434 AMERICAN PACHYBRACHYS (cOLEOPTERa) 



Pygidium entirely black or with two small elongate apical yellow spots. 

 Body beneath black, the last ventral sometimes in part yeUow. Legs yellow 

 with broad black femoral rings and with the tibiae more or less blackish beyond 

 the middle. 



Length 2.75 to 3.4 mm.; width 1.45 to 1.85 mm. 



Distribution. — New Mexico: Cloudcroft (type), specimens before me from 

 type locality collected by Wickham, Knaus and Viereck — June and July; 

 Beulah, Aug. 17 (Skinner in Am. Ent. Soc. Coll.); Las Vegas Hot Springs, 

 Aug. 2 (Barber & Schwarz), (Snow). Colorado: (Liebeck Coll.); Colorado 

 Springs (Wickham); "Col" (J. B. Smith— Nat. Mus. Coll.), (Snow); Pike's 

 Peak, 7,000-10,000 feet (Wickham), two female examples doubtfully referred. 

 Arizona: Bright Angel, July 10 (Barber & Schwarz). 



This species is very similar to and cannot be separated super- 

 ficially from melanostictus, but attention to the ocular lines, and 

 front claws of the male, will enable the student to distinguish 

 them without difficulty. 



115. Paehybrachys sonorensis Jacoby 



Dull yellow, prothorax suffused with a darker rufous tint, 

 alutaceous and opaque, thickly brown to blackish punctate, the 

 standard spots as a rule more or less evident throughout, rather 

 small and not much confluent on the elytra, rarely completely 

 suffused and almost entirely black. Eyes separated by nearly 

 twice the length of the basal antenna! joint in the male, and by 

 fully three times the length of this joint in the female; front 

 without ocular lines; elytra confusedly punctured almost through- 

 out; front claws of male only very slighth' larger than the others. 

 Ave. length 3.6 mm. Arizona to western Texas. 



Head rather finely unevenly punctate, frontal and vertex spots moderate to 

 heavy. Antennae two-thirds as long as the body in the male, with the tenth 

 joint about three times as long as wide; scarcely more than one-half the length 

 of the body in the female, the tenth joint not much more than twice as long as 

 wide, the basal joint unusually small in both sexes. 



Prothorax rather strongly transverse, widest at about basal two-fifths in the 

 male or basal one-fourth in the female, sides nearly straight and moderately 

 convergent in front, sinuate before the hind angles, the punctuation rather 

 fine, close in the dark areas, side margins smooth, thoracic M moderate to 

 heavy, more commonly not attaining the front margin. 



Elytra confusedly punctured, the eighth stria alone entire, the seventh some- 

 times traceable in part, punctures of the eighth stria often moi-e or less double 

 or irregvdar, the lateral interspace with some punctures basally ; shield wanting. 



Pygidium black, with two obliciue apical yellow spots. Body beneath 

 black, last ventral with or without yellow sj)ots. Legs rufo-testaceous, fc^mora 

 with black rings, tibiae with blackish diffuse shades. 



Length 3.2 to 4 mm.; width 1.(55 to 2.2 mm. 



