386 G. R. CROTCH, M. A. 



Tribe 1. — Eretini. 

 ERETES, Lap. (Type siicticus.) [Eunectes || Erichs. Lee] 

 Head large, rather exerted, eyes prominent ; thorax with the sides 

 straight, margined, pi*osternum narrow, acutely pointed ; episterna and 

 epimera of the mesosternum vertical, triangular ; metasternum narrow, 

 acute, laciniae linear, dilate at apex, episterna trapezoidal, epimera tri- 

 angular, distinct; coxal plates emarginate near the epipleurae (which 

 they only just reach), and with a strong fold on the outer lower edge 

 above the first ventral; coxal processes rounded divergent, marginal 

 lines effaced anteriorly; posterior femora with the apical angle simple; 

 tibiae short, without deep punctures, claws unequal ; elytra with the 

 suturaJ angle produced, acute; epipleurae very short, grooved. 



E. sticticus, Linn. Syst. Nat. Ed. xii., ii., p. 6fi6, 12. — Obovate, depressed 

 above, sub-convex beneath, ochreous; head punetulate, the occiput and a spot 

 on the vertex black; thorax hardly punetulate; elytra punctate, the punctures 

 black, obsoletely impressed at the base, deeply towards the apex; the three 

 rows of larger punctures visible, a sub-marginal spot about the middle and an 

 irregular fascia towards the apex, also black. % anterior tarsi broadly patelli- 

 form, beneath with two sub-equal discs; intermediate tarsi simple, claws very 

 elongate. L. -48— .60 inch. 

 Texas, California. 



Tribe 2. — Hydroporini. 



A. Scutellum visible Celina. 



Ab. Scutellum absent. 



B. Elytra acuminate at apex, form very short Hydrovatu*. 



Bb. Elytra simple, form generally ovate Hydroporus. 



CELINA, Aube'. 



Structure of the sternum and coxae similar to that of Hydroporus, 

 from which it differs by the mucronate elytra and the singular inter- 

 mediate tibiae of the £ which are sharply angulate, the basal portion 

 short and narrow, divided by a narrow peduncle from the broad tri- 

 angular apical part. 



C. anglistata, Aube, Spec, vi., p. 447. — Parallel, elongate, brownish-red ; 

 elytra darker, alutaceous; thorax transverse, sides gently rounded, surface 

 very finely and sparingly punetulate, with deep punctures in front and on 

 either side the base; elytra sparingly punctate, dorsal series evident. L. 14 

 inch. 



Southern States, Cayenne. (Aube.) 

 C grossula, Lee. New Spec, p. 22. 



Louisiana. (Leconte.) 



This differs from the preceding by its larger size ('22) and slightly 

 closer punctuation. 



