June, i8 9 s.] Casey : North American Coleoptera. 85 



Xestocis, gen. nov. 

 A few species of peculiar facies are separated under this name, be- 

 cause of the prosternal carination. The antennae are of the normal 

 structure, with the club well developed and the second funicular joint 

 only slightly longer than wide. The anterior tibiae are strongly oblique 

 and acute externally at apex, except in opalescens, where the external 

 angle is slightly thickened and rounded. The maxillary palpi are usually 

 rather slender. The first ventral segment is subfoveate and densely pu- 

 bescent at the centre of the disk in the males. Our five species are 

 strongly differentiated among themselves, and may be described as fol- 

 lows : — 



Boby glabrous 2 



Body clothed with short pubescence or bristles ... 3 



2 — Clypeus bidentate in the male, the prothorax simple and rounded at apex in both 

 sexes. Male. — Suboval,very dark rufo piceous, sometimes paler, polished; head 

 and eyes moderately developed; prothorax two-fifths wider than long, the sides 

 just visibly convergent from base to the obtuse apical angles, rather distinctly and 

 evenly arcuate; lateral margin very fine, the base finely margined, more dis- 

 tinctly in the middle ; punctures minute and rather sparse ; elytra less than one- 

 half longer than wide, twice as long as the prothorax and barely wider, rather 

 narrowly rounded at apex, very feebly subrugulose, minutely, sparsely punctate. 

 Length 15-19 mm.; width 0.7-0.85 mm. Canada (Toronto), New Jersey, 



Pennsylvania, Indiana and Iowa levettei, sp. nov. 



Clypeus monocerate in the male, the prothorax with two long slender porrect pro- 

 cesses. Male. — Oblong-oval, convex, testaceous, polished, glabrous, each punc- 

 ture with an excessively minute hair ; head and eyes moderately developed, the 

 front impunctate, broadly concave, the clypeus reflexed, with a long erect par- 

 allel process at the middle, feebly expanding toward apex, the latter very feebly 

 emarginate ; prothorax distinctly wider than long, the sides moderately conver- 

 gent and evenly arcuate throughout, the apex prolonged over the head and with 

 two long remote straight and porrect processes, the surface behind their separating 

 sinus broadly impressed ; punctures fine, not very sparse ; elytra short, one third 

 longer than wide, twice as long as the prothorax at the median line and some- 

 what wider, rather rapidly and narrowly rounded at apex, the sides arcuate ; 

 surface nearly smooth, minutely, rather sparsely punctate. Female. — Nearly 

 similar to the male, the clypeus broadly sinuate at the middle, the prothorax 

 broadly rounded at apex. Length 1. 2-1.35 mm. ; width 0.55-0.6 mm. Penn- 

 sylvania (Westmoreland Co ) and Rhode Island ( Boston Neck), .miles, sp. nov. 

 3 — Upper surface normal ; vestiiure distinct, even but arranged without order ; punc- 

 tures of the elytra intermingled with larger sparse punctures, which are some- 

 times disposed in vague series ; clypeus bidentate in the male 4 



Upper surface covered with a waterproof crust, through which the extremely minute 



simple hairs protrude 5 



4 — Ves'iture composed of small simple and subdecumbent hairs Male. — Oblong- 

 oval, moderately convex, rufo testaceous, feebly shining ; prothorax wider than 



