160 NORTH AMERICAN 



The surface of the pronotum appears to he much rougher and more 

 irregular in the female. The eyes are comparatively small and in- 

 conspicuous, very narrow. 



6. A. europs n. sp. — Form slender, sub-cylindrical ; sides nearly parallel 

 behind the head; pubescence sparse, recumbent, fine, piceo-cinereous, in- 

 conspicuous. Head very large, much wider than any other portion of the 

 body, fully twice as wide as long ; interocular surface moderately depressed, 

 less than twice as wide as the eye ; sulfations moderate in depth, rounded 

 at the bottom ; intermediate surface rather strongly convex, wider than 

 the lateral portions; punctures large, evenly distributed, deeply impressed, 

 round ; interspaces much narrower than the punctures, moderately convex, 

 shining ; oc-ular lines meeting at slightly more than one length in advance ; 

 antennae slightly longer than the width of head, slender, pale piceous-brown 

 throughout ; third joint two-thirds longer than the fourth, joints of club 

 elongated, narrow, increasing slowly in length, last two of equal width; 

 maxillary palpi long, slender, piceo-flavate throughout. Prothorax widest 

 distinctly in advance of the middle, where it is slightly narrower than long; 

 sides moderately convergent posteriorly and feebly sinuate; anterior margin 

 longer than the posterior, nearly equally and very feebly arcuate ; surface 

 very feebly tuberculate near the basal angles ; narrowly and distinctly 

 canalicnlated nearly throughout its length ; punctures close, rather strong, 

 confusedly coalesceut at some spots, isolated at others ; interspaces narrow, 

 convex, and shining. Elytra at base much narrower than the prothorax, 

 equal in width to the latter at base ; sides strongly divergent posteriorly, 

 much longer than the width at base, strongly and evenly arcuate; together 

 broadly, roundly, and extremely strongly emarginafe behind ; suture much 

 shorter than the pronotum : surface of each elytron near the suture narrowly 

 impressed, sutural margins not depressed ; punctures deeply impressed, 

 somewhat even, nearly coalesceut, rounded ; interspaces much narrower 

 than the punctures, very strongly convex, polished. First three abdominal 

 segments equal in width, as wide as the contiguous elytra ; surface polished ; 

 nearly cylindrical ; closely, evenly, and coarsely punctulate ; transverse 

 carinae not cusped ; lateral margin obsolete except at the bases of the seg- 

 ments, where it is very narrow and feeble. Legs slender, pale piceous-brown 

 throughout ; first joint of the posterior tarsi as long as the next three together ; 

 fourth narrowly bilobed. 



Male. — Sixth ventral segment sinuate at apex, sinus as wide as the apices, 

 more acutely rounded at the bottom, strong, nearly four times as wide as 

 deep : seventh deeply and roundly emarginate at tip, lateral teeth acute. 



Female. — Sixth segment broadly angulate at the apex. 



Length 3.1-3.7 mm. 



Deer Park, Maryland, 7 ; Lee County, Virginia, 4 ; Pennington 

 Gap, Virginia, 1. 



Closely related to megalops, although the abdomen is more dis- 

 tinctly margined in that species. The very large conspicuous head 

 in these species forcibly reminds us of strangulatus in the preceding 

 senus. 



