Coleopterological Notices, VII. 557 



genera, although the eleventh antennal joint is relatively smaller, 

 and the ninth and tenth joints larger than usual; it is evidently 

 homologous in this respect with the African Periplectus of Raff- 

 ray. The antennae are short throughout this peculiar group of 

 exceedingly minute and obscure forms, widely separated at base 

 and with the last joint large, relatively abrupt and elongate- 

 ogival in form ; the body is less linear than in the allies of Euplec- 

 tus, elongate-oval and always distinctly convex. I would suggest 

 the following arrangement of genera, those not North American 

 being marked with an asterisk : — 



Antenna; ll-jointed. 



Ninth and tenth antennal joints very short, lenticular and transverse, the 

 tenth frequently excentric and transversely triangular. 

 Last joint of the maxillary pali^i normal, much longer and thicker than 

 the third. 

 Elytra with a post-humeral pit, from which an acutely elevated carini- 

 forni line extends to the apex. 

 The elytra with a discal stria extending to about the middle ; pro- 

 notum with a well defined lateral edge toward base, and two 

 large lateral fovese connected by transverse posteriorly cuspiform 

 groove. 

 Tenth antennal joint scarcely at all modified and generally sym- 

 metric ; head never wider than the prothorax, with two parabol- 

 ically connected fovese distant from the eyes ; dorsal segments 



equal in length toward base , Actilim 



Tenth antennal joint abnormal, transversely triangular. 



Head very large, with two connected fovese distant from the eyes ; 



dorsal segments equal in length toward base * Trimiopsis 



Head small, with two very widely separated fovese near the eyes ; 

 first dorsal segment longer than the second, with two long and 



conspicuous carinse Actiastes 



The elytra without a discal stria, but having Instead a large elongate 



basal fovea as in Trimium. 



Pronotum with well defined lateral edges and a large pubescent 



fovea at each side at some distance from the margin, connected 



by the usual transverse sulcus ; first dorsal longer than the 



second ; tenth antennal joint transversely triangular. ..Cupila 



Pronotum without well defined lateral edges, and without definite 



pubescent fovese. 



First dorsal longer than the second ; tenth antennal joint 



transversely triangular ; pronotal sulcus not continued down 



the flanks, the conformation as in Trimium Simploiia 



First dorsal not longer than the following, non-carinate and 

 scarcely at all modified at base ; tenth antennal joint normal 



Annals N. Y. Acad. Sci., IX, June, 1897.— 37. 



