6 Natural History Bulletin. 



three longitudinal grooves and a transverse binarcuate groove 

 near the base connecting the three fove^e; the head is longi- 

 tudinally oblong; the eyes small, smaller in the ?; the vertex 

 elevated above the level of the eyes, and an arcuate groove 

 connects two occipital foveas on the disk. The antennae are 

 inserted on the sides beneath lateral tumefactions of the 

 frontal margin; the clypeus is variously sculptured; the lab- 

 rum transverse; the maxillary palpi have the first joint small, 

 cylindrical; the second long arcuate-clavate; the third small, 

 globular; the last fusiform, more convex externally. Anten- 

 nas with the three terminal joints always enlarged; the legs 

 long, with clavate thighs and slender tarsi which bear two 

 unequal claws; the trochanters are commonly long, obliquely 

 jointed to the thighs; the anterior coxas are conical and con- 

 tiguous, the posterior pair transverse. 



TABLE OF SPECIES. 



I. Posterior tibiae without a terminal process; intermediate basal elytral fovea 



obsolete; occipital fovea nude. 



1 3 Vertex not carinate in the middle, occiput tumefied, posteriorly overlap- 

 ping the neck; s intermediate thighs with a curved spine near the 

 trochanters. I>ength 2.66 mm. Georgia. .... ionce. 



i2 Vertex with three convergent carina; on the occiput; ^ anterior tibiae 

 with a strong recurved spine near the middle, the intermediate femora 

 notched above. 



2^ Occiput tumefied; $ posterior tarsi with the second joint dilated. 

 Length 2.4 mm. Pennsylvania. .... - armiger. 



2^ Occiput not tumefied, $, posterior tarsi simple. 



Elytra punctulate, sides of prothorax abruptly sinuate behind; 

 ninth and tenth antennal joints sub-equal, the eleventh 

 wider than the tenth, ovate. Length 2.4 mm. Virginia. 



ferox. 

 ji Vertex with one occipital carina (doubtful) - . - - conjinis. 



II. Posterior tibiae with a long terminal process, base of the elytra trifoveate. 



1 2 Head prognathous, front not separated from the clypeus by an inter- 

 antennal excavation in either sex. $ last antennal joint with an erect 

 basal tooth. 



