358 AMERICAN PACHYBRACHYS (cOLEOPTERa) 



The species most likely to be confused with the present one 

 are diversus, ahdominalis and longus, but all are quite easily 

 separated by the tabular characters. In addition to the more 

 remote eyes, both diversus and ahdo7ninalis have the front claws 

 distinctly enlarged in the male and the ocular lines are more 

 conspicuous. 



40. Pachybrachys macronychus new species 



Rather large, yellow, brown punctate, minutely alutaceous, 

 moderately shining; cephalic spots small, pale brown, thoracic 

 M represented by pale diffuse rust colored shades, elytra without 

 spots; ocular lines wanting, front claws of male very large. Ave. 

 length 3.8 mm. Texas. 



Head densely punctate in the darker areas, elsewhere sparsely so or nearly 

 smooth. Eyes separated in the male by about one and one-half times the 

 length of the basal antennal joint, the distance nearly the same as the vertical 

 width of the upper lobe of the eye. Antennae (d^) long and thin, not much 

 shorter than the body, tenth joint four times as long as wide. 



Prothorax two-fifths wider than long, sides distinctly convergent in front, 

 strongly rounded posteriorly, incui'ved at base, surface moderately closely 

 punctate, quite thickly so in the shaded areas, median line narrowly and im- 

 perfectly or incompletely smooth, side margins smooth. 



Elytra less than twice as long as the prothorax, coarsely punctate, the second, 

 third and eighth striae fairly regular in one example, the second and eighth in a 

 second specimen, the other striae much broken or confused; eighth stria 

 moderately impressed and with a subhumeral dislocation, other striae less 

 evidently impressed; shield indicated but not very well defined. 



Pygidium blackish in basal half, marked as usual. Body beneath blackish 

 brown, the propleura lighter browm, margin of last ventral segment broadly 

 yellow. Legs rufo-testaceous, ends of middle and hind tibiae. pale. 



Length 3.7 to 3.85 mm.; width 1.9 mm. 



Distribution. — Texas: Green Valley, Chisos Mts., Brewster Co., July 15 

 (type c?), and Davis Mts., July 8 (H. A. Wenzel). 



Three males of this fine species are before me, submitted by 

 Mr. Henry Wenzel. 



41. Pachybrachys erassus Bowditch 



Robust, pale yellow, brown punctate, finely alutaceous, not 

 shining, markings small on the head and prothorax, usually 

 wanting on the elytra, the lateral spots sometimes indicated; 

 eyes more narrowly separated than the width of tlicir upper 

 lobes in the female, ocular lines wanting. Ave. length (9) 

 4.2 mm. Utah and Arizona. 



