AMERICAN COLEOPTERA. 387 



HYDROTATIIS, Mots. 

 No doubt can exist that Motschulsky's genus should include IL/- 

 droporu* cuspidatus, lately separated by Kiesenwetter under the 

 name Oxynoptilus. It may be known by the prostemum triangularly 

 dilated behind the coxae; apex and the elytra produced into a sutural 

 point. 



H. cuspiriatiis. Germ.; pustulatus, Mels. Pr. Acad, ii., 29. — Rounded, 

 sub-convex, alutaceous, head, thorax and underside reddish; elytra brown, 

 base broadly and a narrow sub-apical fascia orange; head smooth, thorax 

 sparsely and faintly, elytra distinctly, punctulate ; metasternum closely punc- 

 tate, abdomen smooth. L. "8 inch. 



Middle, Southern and Western States. 



If, as Dr. Schaum thought, this should be really distinct from the 

 European species, Melsheimer's name must be retained. 



The Southern species are smaller and nearly piceous, but I can find 

 no structural differences. 



H. Iloruii. sp. n. — Extremely like H. cuspidatus, but twice as large, simi- 

 larly colored; head shining, with a few punctures on the vertex; thorax visi- 

 bly but sparsely punctate; elytra at the base (especially externally) very 

 coarsely and closely punctate, with a deep sub-marginal groove ; metasternum 

 very coarsely punctate. L. "13 inch. 



Texas. (Belfrage, 899.) 



II YDROPORI IS, Clairv. 

 A. — Body very convex beneath, clypeus generally thickened in front, intermediate 



femora received into a fovea on the epipleura of the elytra. 

 H. insequalis, Fabr. ; punctatus, Say, Long's Exp. ii., 271. — Broadly ovate, 

 head, thorax and underside rufous ; elytra brownish; head and thorax finely 

 punctate, elytra coarsely, closely and uniformly punctate; sternum beneath 

 deeply, abdomen obsoletely punctate. L. -12 — *13 inch. 

 Var. Elytra with distinct irregular pale markings. 

 Middle and Western States. 



The ordinary American specimens are nearly unicolorous, but two 

 specimens from Illinois are now before me, marked precisely as in the 

 European species. 



H. hydropiens, Lee. Ann. Lye. v., p. 205. — Very closely allied to H. 

 in&qualis, but more closely punctate throughout, especially on the head; the 

 pale markings also are more divided, the broad pale margin being broken up; 

 9 opaque. L. '13 inch. 

 San Diego. (Leconte.) 



H. acaroirtes, Lee. Pro<\ Acad., 1855, p. 294. — Rounded, sub-depressed 

 above, head, thorax and legs rufous, sternum and body black; elytra closely 

 and evidently nunctate, scutellar region, suture and some variable discal mark- 

 ings black; beneath ooarsely punctate. L. - 10 inch. 



