328 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



toward the rear and outer margins, becoming ajjically slightly asperate and 

 subequal in size to the strial punctures. 



PygvHum, body beneath and legs nearly uniformly rufo-testaceous except in 

 one male, in which the body beneath is black except the apical half of the last 

 abdominal segment. Front tibiae distinctly nearly evenly arcuate, and feebly 

 widened apically ; terminal spur very small; hind tibiae with very slender spur; 

 claws of front tarsi not appreciably larger. 



Length 3 to 4.4 mm.; width 1..55 to 2.4 mm. 



Distribution. — California : Colorado River, 1 9 ; Raymond, 1 cf (Fenyes) ; 

 Kaweah, 1 9 (Hopping). Arizona: Hot Springs, 1 cf, 2 9 's (Barber and 

 Schwarz). 



The type is the female from the Colorado River. The Ray- 

 mond male differs in having the markings quite black, the body 

 beneath also black; it is, however, undoubtedly identical with the 

 Arizona male. The tabular characters easily differentiate this 

 species from any other now known, but it should be borne in 

 mind that the spur of the hind tibia is very slender and easily 

 broken off — as indeed it seems to be in one of the specimens at 

 hand. The eyes are more closely approximate than in any other 

 of our pubescent species except vigilans, in which, however, they 

 are in actual contact in the male. 

 4. Pachybrachys connexus new species 



Not very robust, rufo-testaceous, elytra with subsutural and 

 marginal black stripes, which are connected narrowly along the 

 base and more broadly on the declivity; metasternum and abdo- 

 men in great part black; pubescence sparse and short, recurved 

 on the prothorax, suberect on the elytra; integuments shining, 

 without trace of alutaceous sculpture. Length 3.25 mm. Arizona. 



Head clear rufo-testaceous without marks, rather coarsely closely punctate, 

 front not impressed. Eyes in female separated by about two and one-half times 

 the length of the rather small basal antennal joint. Antennae lacking except 

 the two basal joints, which are entirely pale. 



Prothorax rufo-testaceous, a little paler along the side margins, without 

 spots, moderately transverse, widest at or a little before the basal third, sides 

 rather strongly rounded, surface a little uneven, closely subevenly punctate 

 throughout. 



Elytra one-fourth wider than the prothorax, two-sevenths longer than wide, 

 sides somewhat sinuate behind the humeri; punctures confused in a narrow 

 sutural region to behind the middle, elsewhere arranged in nearly regular 

 feebly impressed series; interstitial punctures moderately numerous and 

 distinct though rather fine, forming more or less even single series on the nar- 

 rower intervals. The color of the elytra may be described as flavate, the broad 



