162 NORTH AMERICAN 



surface very narrow, scarcely one-third wider than the eye, flat ; sulfations 

 almost obsolete and very obscure ; punctures rather fine, slightly confused 

 and irregular ; ocular lines meeting at one length. in advance ; eyes extremely 

 large and prominent, twice as long as wide ; antennae slightly longer than 

 the width of head, rather slender, piceo-testaceous, becoming' much darker 

 and piceous-brown at the tip, club rather prominent ; third joint scarcely 

 one-third longer than the fourth, eighth as wide as long, intermediate in 

 width between the seventh and ninth, joints of club robust ; maxillary palpi 

 long, piceo-testaceous, becoming nearly flavate at the base, third joint rather 

 robust. Prothorax arcuately, gradually, and evenly increasing in width to 

 a point nearly three-fourths the length posteriorly, where it is about one-fifth 

 narrower than long; sides thence feebly convergent and distinctly sinuate ; 

 anterior and posterior margins equal in length, the former slightly the more 

 arcuate ; surface strongly and nearly evenly convex, finely, closely punctate ; 

 punctures round and moderately impressed. Elytra at base much narrower 

 than the head ; sides feebly divergent posteriorly, much longer than the 

 width at base, rather strongly and evenly arcuate ; together broadly, roundly, 

 and very deeply emarginate behind ; suture very slightly shorter than the 

 pronotvtm ; surface nearly evenly convex ; coarsely, deeply, closely, and 

 evenly punctate. First four abdominal segments equal in width, very 

 slightly narrower than the contiguous elytra, cylindrical, strongly con- 

 stricted at base ; border obsolete ; surface densely and rather coarsely 

 punctate. Legs rather short and slender, piceous-brown, distal tips of 

 femora and basal tips of tibiae very slightly darker ; first joint of the poste- 

 rior tarsi as long as the next two together, second slightly longer than the 

 third ; fourth joints strongly bilobed. 



Mule. — Posterior edge of the fifth ventral segment just visibly, narrowly, 

 and roundly emarginate in the middle, emargination indefinitely terminated 

 laterally; sixth narrowly and deeply incised at apex, incisure one-half 

 deeper than wide, having the anterior and exterior angles very feebly 

 rounded, sides straight ; seventh segment narrow at tip, where it is very 

 feebly and roundly emarginate. 



Female. — Unknown. 



Length 2.S mm. 



Cambridge, Massachusetts, 1. 



This is a very distinct species, allied by the form of the head and 

 elytra to eitrops and megalops ; apparently intermediate between 

 them and the usual type, but having a much greater affinity with the 

 former. 



9. A. plicipeiillis n. sp. (Schwarz MS.). — Form rather slender. 

 Pubescence excessively sparse, fine, moderately long, and very inconspicuous. 

 Head moderate in size, robust, about twice as wide as long ; interocular sur- 

 face two and one-half times as wide as the eye, slightly convex ; sulcations 

 rounded throughout, rather strong; intermediate surface much wider than 

 the lateral portions ; punctures moderate in size, round, sparse, very irregu- 

 larly disposed ; medial regions with but one or two punctures ; interspaces 



