430 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



never seen an example of varians in which the standard marks 

 were not completely represented, though very inconstant in 

 extent, the general tendency in variation being toward an ampli- 

 fication and fusing of the markings rather than a reduction. 

 The general aspect is also very much like that of a small lodingi, 

 but if this latter should ever occur with the spots of quadri- 

 oculatus it may at once be distinguished by the much more dis- 

 tant eyes. 



110. Pachybrachys fractus new species 



Yellow, black punctate, and with the standard markings more 

 or less developed on the prothorax, very small or wanting on the 

 elytra, except the humeral spot; eyes separated by twice the 

 length of the basal antennal joint in the male, front without 

 ocular lines, front claws of male not enlarged. Ave. length 2.7 

 mm. Texas. 



Head sparsely punctate in the yellow areas, densely so in the rather broad 

 and sharply defined black markings; antennae moderate, barely attaining the 

 hind coxae in the male, outer joints blackish, tenth three times as long as 

 wide (cf). 



Prothorax widest at or near the basal third, sides moderately rounded pos- 

 teriorly, a little convergent in front; unevenly punctate; standard marks vari- 

 ably developed, the M quite distinct in the type, attaining only the apical third, 

 the lateral vittae not closely connected with the furcate median one. 



Elytra confusedly punctate baso-suturally, the striae as a rule irregular or 

 fragmentary, not or but slightly impressed, eighth stria fairly distinct and 

 one or two of the discal ones more or less so; marginal interspace sparsely 

 punctate; shield small, not conspicuous. 



Pygidium black with rather large apical yellow spots. Body beneath black, 

 last ventral yellow at sides. Legs mostly yellow, the front thighs with a large 

 black spot on the upper side, middle and hind thighs and all the tibiae with very 

 small black spot. 



Length 2.7 mm.; width 1.4 mm. 



Distribution. — Texas. The type is a male from the Liebeck 

 Collection which I am kindly permitted to retain. A second 

 male in the Nat. Mus. Coll. seems identical, whik^ a female in 

 the same collection is doubtfully referred. All bear the label 

 "Tex." simply. 



111. Pachybrachys truncatus Bowditch 



Rolnist, i)ale yellow, mottled with dark brown; i)rothorax 

 scarcely narrowed in front, ocular lines wanting, front claws of 

 male only slightly enlarged. Ave. length 2.9 mm. Arizona. 



