H. C. FALL 431 



Head a trifle wider than the thoracic apex, front rather sparsely punctured 

 the vertex spot large, median spot moderate, sharply defined, triangular. 

 Eyes separated by about one and three-fourths times the length of the basal 

 antennal joint or by a distance subequal to the width of their upper lobes in 

 the male; in the female by two and one-half times the length of the basal joint 

 of the antennae. Antennae passing the hind coxae in the male, shorter in the 

 female, outer joints darker as usual. 



Prolhorax transversely quadrate, scarcely or but just visibly narrowed in 

 front, punctuation uneven, M moderately well defined, consisting of three 

 basal and two median spots narrowly connected, side margins smooth. 



Elytra short, less than twice as long as the prothorax in the male, striae two 

 three and sometimes four entire, five and six much broken except posteriorly, 

 seven and eight well defined, the latter strongly sinuous and with the usual 

 subbasal dislocation; shield moderate, triangular; marginal interspace with at 

 most two or three punctures at the middle; standard spots more or less distinct, 

 generally rather small and irregular. 



Pygidium blackish at base, the yellow spots broadly confluent. Body be- 

 neath fuscous, sides and apex of abdomen pale. Legs pale with faint median 

 clouds on the femora and tibiae. 



Length 2.65 to 3.15 mm.; width 1.4 to 1.65 mm. 



Distribution. — Arizona: Prescott and Santa Rita Mountains (Bowditch)" 

 Carr Canon, Huachuca Mountains, Aug. (Skinner — Am. Ent. Soc. Coll.). 

 Specimens from the Santa Rita Mountains, collected by Snow, one bearing 

 the name truncatus in Bowditch's handwi'iting are before me. These are a 

 httle less shining than the Prescott type (which I have seen) but seem other- 

 wise identical. In the type the head is barely visibly minutely alutaceous, the 

 prothorax and elytra polished. In the Santa Rita examples the entire surface 

 is very minutely alutaceous, but somewhat shining. 



112. Pachybraehys precarius now sp( cirs 



Pale yellow with sli:ir])ly defined fuscous inarkiugs, the elytral 

 spots small; front without ocular lines; lateral interspace of 

 elytra inipunctate; front claws of male not appreciably enlarged. 

 Ave. length 2..5 nnn. Arizona; New Mexico?; Texas. 



Head not wider than the thoracic apex, front moderately punctate, .spots 

 sharply defined, of medium size. Eyes separated in the male by a distance 

 which is subequal to the length of the first two antennal joints, and barely as 

 great as the vertical width of their upper lobes. Antennae j)ale Ijasally, outer 

 joints blackish, rather more than three-fourths the length of the body in the 

 male. 



Prothorax moderately ti'ansversc, widest at about basal third, a little con- 

 tracted at base, the sides moderatc^lj^ arcuately convergent in front; punctua- 

 tion close in the darker areas, elsewhere somewhat sparse; side margins smooth, 

 M moderate in extent, (juite sharply defined. 



Elytra slightly shining but not polished, confusedly but not densely i)unc- 

 tured ia the scutel'ar region; striae two to three and seven to eight entire, four 



TR.\.\S. AM. ENT. SOC, XLI. 



