172 CASEY 



elytra at base as wide as the thoracic base to somewhat narrower, be- 

 tween three and four times as long as the prothorax, the sides straight 

 and scarcely visibly converging to apical two-fifths, there very grad- 

 ually rounding and arcuately converging to the very narrow stronger 

 arcuation extending to the sutural angles; surface irregularly but sub- 

 equally cribrate, with rather small and deep punctures, nearly wanting 

 in two broader, feebly convex Unes on each near the suture, dense 

 laterally, the submarginal prominent ridge rather evident; under sur- 

 face finely, more feebly punctate, rather closely so laterally, the surface 

 smooth and convex, the fifth ventral transversely truncate at the rather 

 narrow apex, with the ends of the truncature minutely dentiform, the 

 edge impunctate to a fine transverse striiform parallel line a short dis- 

 tance therefrom, apparently not differing noticeably in the two sexes. 

 Length 9.0-12.2 mm. ; width 3.0-4.3 mm. Texas (El Paso). [=Ha- 

 lecia gentilis Horn and Agceocera gentilis Waterh.] gentilis Horn 



The male is smaller and narrower than the female, if I have prop- 

 erly identified the sexes, but does not differ otherwise, except in 

 having the prothorax more parallel and less narrowed anteriorly. 

 The single male before me has a small irregular depression at each 

 side of the median line near anterior fourth, but these impressions are 

 probably adventitious. 



Nanularia n. gen. 



This genus and the two following form a group, altogether distinct 

 from any of those that precede in having the mesosternum separated 

 from the metasternum by a deep cleft; there is, however, little or no 

 harmony between these three genera in other structural characters, 

 and I am unable at present to assign a definite value to the character 

 as a means of dividing the entire family into lesser subdivisions. The 

 body in Nanularia is small, convex and deep, not unlike Anataxis 

 in this respect, as well as in sculpture, except that the outline is par- 

 allel and not cuneate. The head is relatively large and but little 

 narrower than the prothorax, the front even, but with a narrowly 

 impressed and subentire median line, the eyes moderate, with their 

 inner margins converging upward though very feebly, the epistoma 

 not depressed, broadly, feebly sinuate, the labrum short, subcoria- 

 ceous, feebly sinuate, sparsely punctate and with short stiff sparse 

 hairs, the mentum short, very transverse and very broadly, parabolic- 

 ally rounded, the palpi rather slender. The antennae are inserted in 

 small and widely separated fovea:, each margined above by a small 

 inconspicuous oblique ridge, the ridges tending however to join each 



