OXYCEPHALA. 73 



eyes piceous. Head and frontal spine as in Ch. suturalis.. Tho- 

 rax broader ; sides more rounded, upper surface less convex ; the 

 two fovea) on the anterior margin absent ; puncturing on the sides 

 similar ; base impunctate. Elytra entirely pale fulvous, their apex 

 acutely rounded ; each elytron with eleven rows of distinct pimc- 

 tiires, the striae towards their apex and near the lateral border 

 siibsulcate. Beneath pale fulvous ; anterior pair of thighs much 

 incrassate, compressed, clavate, their upper edge very convex, 

 lower siirface armed just beyond the middle with two nearly 

 parallel stout spines ; tibije of the same pair with the apical half 

 incrassate, dilated internally into a flattened plate ; inner surface 

 of basal haK imarmed. {Male.) 



Hah. Columbia? 



A single specimen in the Museum collection. 



The presence of two teeth on the lower surface of the anterior 

 thighs and the dilated plate on the apical half of the anterior tibiae 

 ■Roll at once separate this species from the former. The specimen from 

 which I have drawn the above description is apparently immature. 



Genus XVII. OXYCEPHALA, Guer. Details, Tab. I. Fig. 17. 



Voy. de la Coquille, Zool. t. ii. p. 142. 

 Ceplialoleiae pars, Blanch. 



Antennce (fig, 17 a) filiformes, apice attenuatae, robustae, articulis 

 cylindi'icis aut subcyHndricis, prime incrassato, secundo tertio 

 paullo breviori, caeteris subaequalibus, ultimo acuto. 



Lahrum (fig, 17 6) apice emarginatum, 



Mandihultv (fig, 17 c) trigona?, dcntatse. 



Palpi maxillares (fig. 17 d) articulo primo parvo, secundo subcla- 

 vato, tertio breviori, obconico, subtrigono, ultimo secundo aequali, 

 ovato ; labiales (fig. 17 e) articulo primo parvo, secundo leniter 

 curvato, subclavato, tertio paullo ampliato, ovato. 



Labium (fig. 17/) oblongum ; mento (fig. 17^) trapeziformi vel 

 subtrigono, angulis anticis oblique truncatis ; liguld seymento 

 basllari parvo, fere obtecto, apicali crasso, apice obtuse. 



Copw^fronte (fig. 17 h) antrorsum productfi, tridentata, dente centrali 

 in spinam acutam producto. 



Thorax subquadi'atus, angulis anticis interdiim dilatatis. 

 Scidellum pentagonum. 

 Elytra subelongata, apice rotundata. 



Pedes breves ; femoribus anticis incrassatis ; tibiis basi incurvatis, ad 

 apiccm incrassatis ; tarsis latis. 



Corpus elongatum. (Type, Oxycephala depressa.) 



I have not seen Oxycephala cornigera of Guerin, the species on 

 which he founded the present genus in the Voyage de la Coquille ; 

 but it is 60 closely allied, lioth by description and figure (the latter 



