452 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



Distribution. — Nebraska: (type); Lincoln, June (Nat. Mus. Coll.)- Ka7isas: 

 (Le Conte Coll.); Douglas Co., 900 feet (Snow); Salina (Knaus). Hamilton 

 Co. (Snow). Texas: (Blanchard Coll.), (Liebeck Coll.). Colorado: Colorado 

 Springs, June (Wickham). 



This is a somewhat scarce species of which I have seen alto- 

 gether but ten examples. It is easily separable from all others 

 in our fauna except the next (dubiosus), which see for comparative 

 notes. 



134. Pachybrachys dubiosus LeConte 



Very closely allied to vir gains. The type is a female from Texas 3.1 mm. long, 

 as compared with 4.1 mm. for the type of virgatus. The median thoracic 

 stripe is here rather widely bifurcate in front, but does not joint the lateral 

 stripes. In virgatus the median stripe is more abruptly but not greatty dilated 

 at middle, the anterior part not evidently bifurcate, but with subparallel sides, 

 the median line of the dilated portion often narrowly and obscurely paler. The 

 surface is nearly as perfectly smooth and shining as in virgatus, there being at 

 most but the faintest evidence of alutaceous sculpture; the sides of the pro- 

 thorax are a little dilated behind (scarcely so in virgatus) and this is quite con- 

 spicuous in a second example — a male from Texas — subsequently associated 

 with the female type. This male specimen is closely similar to the type in 

 lustre and sculpture and is probably identical but this cannot be asserted with 

 certainty. In it the eyes are separated by scarcely if any more than twice the 

 length of the basal antennal joint, a distance rather less than in a number of 

 females before me which I am placing as dubiosus. In the type the lateral mar- 

 ginal bead is scarcely visibly darkened and the outer elytra! vitta occupies the 

 eighth interspace for a shorter distance than in any other specimen seen by me. 

 In one example (San Antonio, Tex.), the elytral vittae are faint. 



Le7igth 2.7 to 3.S mm.; width 1.45 to 2.2 mm. 



Distribution. — Texas: The type was probably collected by Belfrage, as were 

 certainly some examples before me from the National Museum Coll. Most of 

 the specimens at hand carry simply the state label, but the following specific 

 localities are represented. San Antonio, June 22 (Hubbard & Schwarz); 

 Marfa, July 5 (Wenzel); Alpine, July 20 to 22, 4,400 to 6,000 feet (Wickham). 

 Kansas: Clark Co., 1,962 feet. May; Morton Co., and Marion Co., all collected 

 by Snow. 



13.5. Pachybrachys pawnee new species 



Yellow, lustre dull, i)rothorax with three black stripes not 

 attaining the apical margin, the middle one furcate in front but 

 not joining the lateral stripes; elytra with sutural bead and two 

 discoidal stripes black, the outer one confined to the eighth inter- 

 space; front Avithout ocular lines; front claws of male distinctly 

 enlarged. Ave. length 3.25 mm. Kansas; Dakota. 



