61 Z. tarmia Serv. This iiifsuct is very common throughout central and northern Arg-entina where it occurs for the most part on low ground or in the vicinity of water where vegetation is rank. It has sometimes been reported in sufficient numbers to cause noticeable injury to vegetation. (All of the collections).
Fitr. 26.~Zoniopod(i taisuta Serv.— male Fi^. 27. — Zoniopoda ouniicolor Serv. — female Z. jiniconiin Berg. This insect has been reported only from swampy localities where it occurs sparingly upon rushes growing in the water. Specimens have been recorded from San Lorenzo, Jujuy, and Resistencia, Chaco (Giglio-Tos) ; Buenos Aires (Dr. Berg).
Z. > onniicn/or Blanch. Found moderately abundant at Cordoba. This insect was described and figured by Blancluird in Voyage dans I'Amer. merid., Vol. VI, pt. 2, Ins. j). (l'K)) PI. XXVII, tig. 8, and aj^pears to be the same one described by Stal (Recens. Orth., I, l^s?;], p. ~)'2) as Z. eiii(ir<jiii(i1<i. Note. Bolivar described an insect under the nauie of Zoniopoihi pivta (Viaje al Pacif., Orth., 1884, p. 37) that later seems to have been placed in the genus Dipont/iu.s and given the sjjecitic name pnclcIniH (Pictet et Saussure, Cat. d' Acrid., in Bull. Soc. ent. Suisse, VII, p. o?.')).
62 GENUS CLARAZELLA, PICT. ET SAUSS.
G. iMtagona Pict. et Sauss. This insect has been reported from Bahia Blanca, near the boundary of Patagonia (Pictet et Saussure).
GENUS TROPIDACRIS, SCUDD.
T. cristata (Linn.) The "Langosta Negra" of Argentina occurs throughout the various provinces bordering the Andes mountains, where it sometimes joins the manga s of Hclmtocerca 'paranensis as these drift over the country. This insect does not, however, become sufficiently numerous to commit depredations in cultivated fields. It has been reported from San Louis, Rioja, Cordoba, Catamarca, Tucuman, Salta and Jujuy.
GENUS DIPONTHUS, STAL.
TABLE FOR SEPARATING THE SPECIES.
A. Tubercle of the prosternnm with the apex acuminate, retro-arcuate, b. Grass-green. The tegmina immaculate: wings greenish-hyaline. Pronotum with the posterior lobe one-halt' longer than the antex-ior. Posterior tibia^ green, not dotted with black. electiis Serv.
bb. Black besprinkled with yellow. Tegmina fuscous varied with yellow, wings dilute rose color. Pronotum with the posterior lobe not one-half longer than anterior. Posterior tibi:v dotted with black, the base and apex also black. claraziaiius Pict. et Sauss.
A A. Tubercle of prosternum straight, not retro-arcuate. b. Tegmina olivaceous or black and yellow, very densely punctate, c. Body and legs not black spotted.
d. Apex of wings clouded, the veins fuscous. Base of ventral segments black, e. Larger. Posterior lobe of pronotum entirely greenish testaceous, arg'eiitiiius Pict. et Sauss.
ee. Smaller. Posterior lobe of pronotum black except hind border. Knees of hind legs, head and pronotum varietl with i-ed. Scliulzi Bruner.
dd. Apex of wings hyaline, the veius greenish. Base of ventral segments not black. perniistus Serv.
cc. Body and legs decidedly spotted with black, d. General color greenish, varitd with yellow and lilack. comiuuiiis Bruner.
dd. General color dull grayish-brown or dark olive, varied witli red and black. " pyciio.stictiis Pict. et Sauss. bb. Tegmina fuscous and yellow-marbled.
c. Larger. Pronotum with posterior lobe one-half longer than the anterior, rounded behind. Body and legs spotted with black. iiigTO-coiisper.sus Stal.
63 cc. Smaller. Pronotum with posterior lobe less than half as long again as the anterior, obtuse-angled. Head, ])ronotum. alxlomen below, and apex of hind femora with Itase of tibia? marked with red. puelchus Pict. et Sauss.
D. elect ns Serv. Patagonia (Pict. et Sauss.). D. (iaruzlanuH Pict. et Sauss. Bahia Blanca, Entre Rios (Pict. et Sauss.)
1). (nr/e)iti)(ns Pict. et Sauss. Buenos Aires (Pict. et Sauss.): Carcarana (O. Thomas).
I>ij)(»ifhi(s ScJtnlzl n. sj).
A very beautiful insect belonging to the same grouj) with the i^receding but considerably smaller and more varied with light and dark markings. The frontal costa, median line on fastigium and occiput continuous with the line on jjronotum. The cheeks, back and below the eyes, an oblique line on the sides of pronotum commencing at about the middle and directed upwards and backwards, also lower edge of each side brig?it greenish yellow. There is also a similarly colored line on both the meso- and metapleurae, other portions of the head, pronotum, and meso- and metathorax black. Tibiae black in some specimens ; the lower part of face, edges of occiput and ends of hind femora, with back edge of pronotum bright red. Antennae black, basally the joints annulated with light yellowish. Hind femora with a basal spot outside and inside, and two very heavy black bands on outer, upper, and inner faces ; sometimes continued more or less strongly on the lower edge also ; knees also black both internally and externally ; posterior tibiae w^ith the tips and under side of base black ; anterior and middle femora, along with tibiae, more or less black. Abdomen yellow with rather heavily marked basal bands of black; above varied with black and yellow streaks.
Length: of body, c? 25-26 mm. V 30 mm: of lu'onotum, -f' 4.25 mm, 9 6 mm; of tegmina, cf' 20 mm, '? 2!^ www. hind femora, (^"12 mm, ? 16 mm.
This beautiful species was contained in the collections of F. Schulz and H. Stempelmann.
64 It occurs, so far as I am at j^resent aware, only in the vicinity of Cordoba, where it is fairly abundant. D. peruiistuii Serv. Bahia Blanca, Buenos Aires (Pict. et Sauss, ); Carcarana (Bruner, O. Thomas).
DipontJiJis coiiniiKn/s n. sp.
Very similar in size and form to D. pijcnoKtictus and D. arf/entiiius, but differing from those two insects in being of a bright olive green color instead of testaceous or red ; and with the prothorax, sides of body, and hind tibiae together with femora, less mottled with black than in those sj^ecies. Tegmina with the general color varying from dark olive green to black, mottled by lighter markings. Antennae either unicolorous or light with the apex of joints dark, giving these appendages an annulated appearance. Wings with the base and disk red, the apex greenish, in some specimens infuscated, the veins darker. Anterior and middle femora more or less speckled with black; the tibiae in some specimens black, in others greenish ; posterior femora with two more or less complete dusky bands on outer, upper, and inner faces ; the knees both inside and out black ; extremity of posterior tibiae black : spines black tijjped. Abdominal segments with indications on venter of transverse black bands on basal portion, other parts of venter more or less closely si^eckled with black.
Fig. 28. — Dijiontlnis comvmnis Bruner.
Length: of body, c? 18 mm, ? 36 mm; of pronotum, d^ 5 mm, 9 7.5 mm; of tegmina, d 22 mm, ? 30 mm; of hind femora, cJ 12 mm, + 17 mm.
On camp in provinces of Cardoba, Santa Fe, and Buenos Ayres. (Collection of O. Thomas).
65 This, next to the i^receding, appears to be the eoiiiinonest species of I)ii)(»it/n(M upon the pami^as. It seems to be partial to a small, thorny Solanum as a food-plant. B. /){/cnosf ictus Pict. et Saiiss. Entre Rios {Pict. et Saiiss.); Province of Sanat Fe (Bruner).
I). }ihji-o-co)is[)ersas Stal. La Republique Argentine (Pict. et Sauss.)
D. puelclins Pict. et Sauss. Cordoba (P. Schulz, H. Stempelmann. ) This insect seems to be the same as that decribed by Ignacio Bolivar as Zoniopoda pict a (Artrop. del Viaje al Pacitico, p. 37, 1SS4). Should this prove true Bolivar's name would have priority.
GENUS LEPTYSMA, STAL.
L. Jiiiforiiils {Sew.) This insect occurs at San Lorenzo, Jujuy, and Resistencia, Chaco (Giglio-Tos). GENUS LEPTYSMINA, GIGLIO-TOS.
TABLE FOR SEPAKATlNc; THE SPECTES.
A. Tnbei'cle of the prosteniuin eoiiipressecl from tlic sides, the apex dilated and rounded. I>alli<ia Giyjiio-Tos. AA. Tubercle of the prosternum with the apex not tlilattid. rosea Giylio-Tos.
L. iKilllda Giglio-Tos. Resistencia. Chaco (Giglio-Tos). L. rosea Giglio-Tos. Buenos Aires (Giglio-Tos) : Carcarana, and Rosario, Prov. Santa Pe (O. Thomas). Hg. 29. — Leptysinina rosea (jiiglio-Tos. GENUS ARNILIA, STAL.
TABLE FOH SEPAKATlNc; THE SPECIES.
A. Larger. The front more or less rugose. <'.vlin<Ir<»<l<"s Stal. AA. Smaller. The front smooth. .nr.ioili.s (iiglio-Tos.
66 A. cyUndrodes Stal. Resistencia, Chaco (Giglio-Tos). A. Gracilis Giglio-Tos, GENUS STENOPOLA, STAL.
St. puncticeps Stal. San Lorenzo, Jujuy (Giglio-Tos); Resistencia, Chaco, (Bruner).
GENUS PARACORNOPS, GIGLIO-TOS.
P. longipeiinis (DeGeer). Among water plants, Resistencia, Chaco; also Territory of Formosa across the river from Asmicion, Paraguay (Bruner).
GENUS BUCEPHALACRIS, GIGLIO-TOS.
B. Borellii Gilgio-Tos. Formosa, just across the river from Asuncion (Bruner).
Fig. 30. — Aleuas lineatus Stal. — female. GENUS ALEUAS, STAL.
A. lineatus Stal. Quite abundant among Juncus, Carcarana, Rosario, etc,. Province Santa Fe. (O. Thomas, H. Stempelmann).
GENUS JODACRIS, GIGLIO-TOS.
TABLE FOR SEPARATING THE SPECIES.
A. Body cyliudrical, sides of pronotiim provided with a well-deiined dusky band. Sexes equal in size. Cerci of male very long, slender, and with the outer branch more or less curved. Hind tibias with seven spines in outer row ferrug-inea Giglio-Tos. AA. Body more or less compressed, sides of pronotum with but poorlydefined dusky bands. Sexes very unequal in size. Cerci of male not unusually long, straight, the branches nearly equal in length. Hind tibite with eight spines in outer row. b. Wings with base bottle-green. nebulosa Bruner. bb. Wings caerulean. caeruleipeiiuis Bruner. J. ferrnginosa. Giglio-Tos. Found on rotten logs near Ft. Pilcomayo, across from Asuncion, also at San Bernardino, Paraguay in similar localities (Bruner).
67 Although by the use of the table for separating the genera of the sub-family Acridiinae found in Argentina the two following species will fall in the genus Jodacris, they differ considerably from the insect upon which the table was chiefly based ; and, perhaps, form a new genus which would be separated from the preceding in having the body somewiiat slenderer, the pronotum more expanded posteriorily, the head proportionately smaller, H intead of 7 spines in outer row of hind tibiae, and the abdomen compressed rather than cylindrical as indicated for the genus in which they are placed. In looking over the description of the genus Jodacris as given by Giglio-Tos, it appears evident that he had before him a male of the insect mentioned as J. fernu/hiea, and a female of the one named here J. (V) nehulom, hence the agreement of the generic description of Jodocris with the present insects.
Jodacris (?) itcbulosa n. sp.
General color dull ferrugineo-fuscous, with the face, lower and ujDper edges of sides of pronotum, together with an oblique line on meso- and metapleurae somewhat lighter; tegmina obscurely mottled with dark brown or dull black. The hind femora marked with two dusky bands across the upper edge and extending to the inner face; the lower external edge also black. Posterior wings clouded apically, bright bottle green basally. Sides of pronotum a little above the middle with a more or less well marked oblique dusky band which is continuous with that back of the eyes and below the light colored oblique band of meso-and metapleurae. Posterior tibiae obscure grayish blue, more or less mottled with black, paler basally. Pronotum expanding posteriorly, the three transverse sulci profound ; median carina present on front edge of anterior and on posterior lobes ; the anterior edge gently emarginate, and posterior edge broadly angulate. Upper valves of female ovipositor moderately long, acuminte, the edges crenulate before the apex. Circi of male compressed, rather broad basally. beyond slender, quite long, gently curved inwai'd, the apex forked, tlu^ inner prong slightly the
68 longer. Supra-anal plate elongate triangular, the apex slightly upturned ; last ventral segment sharply acuminate. Length: of body, d 14 mm, ? 20 mm; of pronotum, d' 3.25 mm, ? 4.5 mm; of tegmina, d 15 mm, ? 19 mm; of hind femora, d 9 mm, ? 12 mm.
Specimens of this insect were taken both at Asuncion, Paraguay and in the province of Tucuman, Argentina, where it was not uncommon in the open woods ujDon low bushes and among the leaves beneath tliB larger trees. Jodacris [/') vaerulelpennls n. sp.
Very similar in general appearance to J. nehu/osa but differing from it in being somewhat slenderer and in having the base of wings blue intead of bottle green, the sides of pronotum unicolorous instead of banded, and the male circi shorter, more robust, and the outer tooth the larger. The tegmina are also less plainly mottled than in the precedingspecies, while the hind femora are without the black lower edge and have but faint indications of dusky bands above. Posterior tibiae greenish gray, but little infuscated apically. Size about the same as the jDreceding only somewhat more slender.
This insect w^as taken in company with the jDreceding at Asuncion, Paraguay, and across the river in the territory of Formosa.
GENUS VILERNA, STAL.
" V. rugulosa Stal. This insect seems to be widely distributed over all northern Argentina where it occurs abundantly among the different kinds of yuccas and their allies. A favorite retreat of its seems to be between the bases of these spined leaves and the stem to which they are attached. (Giglio-Tos, Bruner).
GENUS OSMILIOLA, GIGLIO-TOS.
O. cmrita Giglio-Tos. San Lorenzo, Jujuy (Giglio-Tos).