96 NORTH AMERICAN 



Form linear, depressed ; sides parallel ; head very large and flat ; eyes 

 small ; genae long. 



Head strongly punctate toward the eyes 11. COlllllieilS. 



Head not distinctly punctate; body extremely slender and linear; 



size very minute 12. pei'teiiuis. 



Pronotnm not having a median canaliculation or punctiform impression upon 

 the disk ; under surface of head having a dense pad of erect setae. 

 Prothorax strongly transverse ; median impression near the base very 

 large and almost circular, nearly one-half as long as the entire pro- 



notum 13. cavicoUis. 



Prothorax very moderately or feebly transverse ; posterior median impres- 

 sion moderate or small, strongly dilated laterally. 

 Large species ; pubescence very short and dense, giving an opaque 



appearance to the integuments 14. crillitllS. 



Integuments polished ; pubescence scarcely noticeable. 

 Larger species, not less than 1.4 mm. in length. 



Head very small 15. capitllllllll. 



Head larger, as long and nearly as wide as the prothorax. 



16. decoi'us. 

 Minute species, not exceeding 1.2 ram. in length. 



Form very convex and rather robust ; prothorax rather strongly 

 narrowed behind, sides very evenly arcuate anteriorly ; color pale 



reddish-testaceous 17. ai'CliatllS. 



Form somewhat depressed ; color dark piceous-brown or piceous- 

 black. 

 Prothorax distinctly wider than long ; sides feebly convergent 



posteriorly; color plceous-black throughout 18. leviccps. 



Prothorax nearly quadrate, sides jiarallel ; color of elytra blackish- 

 castaneous, that of the remainder of the body piceous-brown. 



19. ruficeps. 



1. E. caiialicillatUS Lee. — Bost. Joum. VI. p. 107. — Form rather 

 robust. Pubescence somewhat long, fine, and dense, pale fulvo-cinereous 

 and rather conspicuous ; color of body pale ferruginous throughout, shining. 

 Head rather small, slightly broader than long ; eyes moderate in size and 

 prominence ; genae scarcely prominent, shorter than the eye, strongly con- 

 vergent behind ; base broailly sinuate ; interocular surface polished, some- 

 what asperate, extremely convex, having a conspicuous longitudinal medial 

 canaliculation at the occipital declivity, and at more than one-third the 

 length from the base, two very minute spongy-pubescent foveae, very close 

 to the eyes, intermediate surface nearly three times as wide as the distance 

 of either fovea from the eye, very strongly convex and prominent, abruptly, 

 strongly, and conspicuously declivous at one-tliird the length from the frontal 

 transverse ridge ; the latter strongly arcuate anteriorly, swollen longitudi- 

 nally in the middle, where it bears a small acute dorsal tubercle ; innnedi- 

 ately behind this inter-antennal ridge and along the bottom of the declivity 

 of the inter-foveal convexity there is short, transverse, posteriorly arcuate 

 (•hannel dilated at the ends ; supra-antennal tuberculations moderate, angu- 



