H. C. FALL 403 



Distribution. — Texas: Two males and five fcinalfs arc before me from the 

 Leng, National ]\Iuseum and Am. Ent. Soe. Collections. KfiK.'^as: Douglas 

 Co. (Snow). Arizona: Ash Fork (Barber & Schwarz). 



The Texas examples, including the type ( 9 ), are without 

 indication of specific localit}'. The Kansas specimens are more 

 elongate than in the typical form, the eyes in the male a little 

 more distant and the elytral fascia obsolete or faint. In the 

 single Arizona male the form and obsolete elytral fascia are almost 

 exactly as in the Kansas one, but the e,yes are not more distant 

 than in the type form; these variations are probably not specific, 

 at least the}^ need to be supported by more specimens before they 

 can be so considered. 

 85. Pachybrachys vacillatus new species 



Dull yellow, maculate with black, punctuation rather dense 

 and in great part confused on the elytra; front without distinct 

 ocular lines, these detectable but very close to the eyes; front claws 

 of male distinctly enlarged. Ave. length 3.2 mm. California 

 to Colorado. 



Head not wider than the thoracic apex, spots small, sui'face, except in the 

 spots, sparsely punctate; eyes separated in the male by a distance which is 

 t3'pically equal to the width of their upper lobes or about one and one-half 

 times the length of the basal antennal joint, in the female by fully twice the 

 length of the basal joint; antennae slender, blackish in outer half, three-fourths 

 the length of the body in the male, tenth joint three times as long as wide. 



Prothorax moderate in size, widest at about the basal third, distinctly nar- 

 rowed in front, sides strongly rounded at point of maximum width, and 

 broadly arcuate, nearlj- straight or feebly sinuate (in type) anteriorly, rounded 

 in at base; punctuation uneven, moderately close in the IM, which varies from 

 moderate to broad, elsewhere sparse, lateral margins more or less smooth. 



Elytra distinctly wider and rather more than twice as long as the prothorax, 

 punctuation broadly diffused on the disk, striae feebly or scarcelj' impressed 

 and as a rule more or less completely confused excejJt the seventh and eighth 

 and short apical remnants of some of the others, the third and fourth sometimes 

 more or less defined; marginal interspace punctate at least in basal half in 

 male, and throughout its length in the female, in which sex the two outer series 

 of punctures are less distinct than in the male; shield wanting or at most 

 feebly indicated. Maculation variable; the standard spots may l)e all i)resent 

 and distinct or they maj' be broadly diffused and confluent; quite as often the 

 anterior one of the inner series is lacking and the midtlle one is small and joined 

 to the posterior one; the middle outer spot is sometimes obsolete. 



Pligidiinn black with th<> usual pal(> spots confluent at ajiex. Hotly beneath 



TR.\NS. .\M. KXT. SOC. XLI. 



