NORTH AMERICAN COLKOPTEItA. 57 episternum comes very far from attaining the metasternum in cereum it actually borders it for a short distance in the present species. T. pillictatum n. sp. — Form nearly as in cereum; glabrous ; shining. Head small ; rostrum very short, robust, strongly constricted at the base between the eyes, enlarged at the tip, which is transversely truncate and clothed at the sides with very sparse setae ; surface rather finely rugulose ; front finely punctate in the middle, more coarsely so toward the eyes, minutely granulose, rather strongly convex ; eyes coarsely granulate. Prothorax slightly longer than wide, widest at the base whicli is broadly angiilate, angle broadly rounded ; apex nearly one-half shorter, strongly arcuate ; sides gradually divergent posteriorly except in the middle, where they are abruptly arcuate for a short distance, very feebly sinuate just before the basal and behind the apical angles ; angles at base and apex rather prominent ; disk very sparsely and minutely punctulate toward the base, with a very few widely scattered larger punctures ; surface polished in the apical half, granulose toward the base ; just behind the apical margin there is a transvei'se row of small punctures, which become very large and deep on the flanks. Elytra widest at the humeri, where they are one-third wider than the pronotum at base ; sides thence feebly convergent posteriorly and acutely roiinded behind ; disk very convex, polished, reticulated ; very strongly, coarsely, and sparsely punctate, punctures arranged in rows ; suture nearly two and one-half times as long as the pronotum. Scutellum minute, longer than wide. Legs robust ; last joint of the tarsi slender ; claws very small, strongly arcuate. Last ventral segment as long as the two preceding together, nearly flat, very strongly arcuate behind ; surface sparsely and somewhat finely punctate. Color of the upper surface of the body brassy-bronze, that of the lower surface black, legs piceous. Mesosternal episternum not attainingthe metasternum. Length 4.0 mm.; breadth 1.8 mm.
Willets Point, Long Island.
From cereum this species differs radically in its much larger size, in the shape of the prothorax and elytra, in the punctuation of the latter, in the punctuation of the under surface, especially of the metasternum and last ventral segment, and in the punctuation of the pronotum. In cereum the punctures of the elytra are smaller, and generally joined in the rows by at least a feeble impressed channel, giving sometimes the appearance of a punctate stria, and the sculpture of the last ventral segment is very close, coarse, coalescent, and confused, more particularly so toward the tip. The greatest difference exists, however, in the shape of the pronotum, the sides being abruptly constricted at the base in cereum, so that it is widest before the middle ; that species also lacks the row of punctures behind the anterior margin. The metasternum in cereum is very coarsely and deeply punctate while in the present species it is sparsely and rather finely so. The type specimen was found clinging to the under surface of a stone on the shore of a small pond.
58 TIIOS. L. CASKY.
EXPLANATION OF THE PLATE. Fig. 1. Anterior portion of the head in Harpalus convictor. Fig. 2. The aame in //. riridldiiens. Fig. 3. Tlie same in II. cjiuonicus. Fig. 4. The same in H, lustralis. Fig. 5. The same in H. lenescens. Fig. 6. Structure of the raesosternum between the coxae in Tithams. Fig. 7. Antenna of Titlianis. Fig. 8. Structure of the mesosternura between the coxae in Aleochara. Fig. 9. The same in Emplenota. Fig. 10. Conformation of thg mesosternal and metasternal episterna and the mesosternal epimeron in Tijloderma ni(jrum. Fig. 11. The same in T. wreiim. Fig. 12. The same in T. baridlum.
PLATE
NORTH am?:ricax coleopteka. 59 LIST OF SPECIES DESCRIBED OR CITED. PAGE Pterostichus zephyrus n. sp 2 osculans n. sp 2 Amara apachensis n. sp 3 marylandica n. sp 4 pallida ii. sp 5 ferruginea n. sp 5 Anisodactylus arizonae n. sp 6 Amerinus linearis (Lee.) 7 Bradycellus lucidus n. sp 8 Harpalus opacus n. sp 8 manhattanis n. sp 9 vespertinus n. sp 10 placidus n. sp 10 mutabilis Hald 11 viridiseneus Beauv 12 convictor n. sp 12 canonicus ii. sp 12 lustralis n. sp 12 aenescens n. sp 12 Selenophorus aeneopiceus n. sp 13 Stenolophus gracilis n. sp 14 Bembidium vinnulum n. sp 15 Tachys litoralis n. sp 15 Tithanis valida (Lee.) 17 Emplenota maritima ii. sp 17 Euaesthetus brevipennis n. sp 20 punctatus n. sp 21 floridae n. sp 21 similis n. sp 22 mundulus ii. sp 23 robustulus n. sp 24 iripennis n. sp 25 texanus n. sp 26 americanus Erichs 27 atomus u. sp 28 Edaphus nitidus Leo 29 carinatus n. sp 30 luculentus n. sp 31
00 THOS. L. CASEV. PAGE Tychus testaceus ii. sp 31 Bryazis gracilis n. sp 32 inopia n. sp 33 Carpophilus zuni ii. sp 34 Epuraea papagona n. sp 35 Ennearthron californicum n. sp 36 unicolor n. sj> 37 Lachnosterna subpruinosa n. sp 38 anxia l.ic 39 Drakei Kii-]) 39 consimilis Lee 39 fusca (FriHil) 39 Eurymetopon piceum ii. sp 40 eniarginatum n. sp 41 papagonum ii. sp 42 carbonatum ii. sp 43 sculptile n. sp 44 dubium n. sp 44 Emmenastus nanulus n. sp 45 Coniontis elliptica n. sp 4(3 Eleodes arcuata n. sj) 47 Platydema pernigrum n. sp 49 parvulum ii. sp 50 opaculum n. sp 51 Disonycha pulchra u. sp 51 arizonae n. sp 52 Chcetocnema paupercula n. sp 53 Psylliodes extricata n. sp 54 aenescens n. sp 55 Tyloderma nigrum n. sp 5(} puiictatum 11. sp 57
Casey, Thos. L. 1884. "Contributions to the descriptive and systematic coleopterology of North America. Part 1." Contributions to the descriptive and systematic coleopterology of North America ... 1–60. View This Item Online: https://www.biodiversitylibrary.org/item/36692 Permalink: https://www.biodiversitylibrary.org/partpdf/144949 Holding Institution Smithsonian Libraries and Archives Sponsored by Smithsonian Copyright & Reuse Copyright Status: NOT_IN_COPYRIGHT This document was created from content at the Biodiversity Heritage Library, the world's largest open access digital library for biodiversity literature and archives. Visit BHL at https://www.biodiversitylibrary.org.
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