II. C. FALL 383 



In this species the head and especially the prothorax are dis- 

 tinctly alutaceous, and the latter shows scattered minute punc- 

 tures between the larger punctures. The elytra are moderately 

 shining and barely detectably alutaceo-rugulose. 



66. Pachybrachys snowi Bowrlitch 



Large, robust, yellow with red-brown to piceous markings; 

 eyes in male separated lyy one-half the vertical width, and in the 

 female by scarcely the width of their upper lol)es; front without 

 ocular lines; lateral intersj)ace of elytra impunctate behind the 

 subbasal interruption; front claws of mak^ a little enlarged. Ave. 

 length 4.4 mm. Arizona. 



Head with the usual marks, broader and more diffuse in the female with 

 correspondingly more diffuse punctuation. Eyes (cT) separated by the length 

 of the basal joint of the antennae, in the female by one and three-fourths times 

 the length of the basal joint or a little more. Antennae short, scarcely passing 

 the humeral umbo in the female; about two-thirds the length of the body in the 

 male; tenth joint three times as long as wide. 



Prothorax moderately (cf) or more strongly (9) transverse, narrowed in 

 front, rather strongly rounded at sides behind the middle, esperialb' in the 

 male; surface verj' minutely alutaceous and moderately shining, punctuation 

 rather fine, not dense, though somewhat closer in the darker areas, a narrow 

 smooth median line in anterior half; the side margins smooth, more broadly 

 so behind; M rather broad, somewhat broken but with distinct outlines. 



Elytra very little wider than the prothorax, punctuation coarser than in the 

 latter, broadly confused on the disk, serially arranged on the convexity and 

 with the two outer striae distinct, only lightly impressed; shield undeveloped 

 or small and inconspicuous. Standard spots evident, the lateral ones well 

 marked; the front one of the inner series diffuse and indistinct, the other two 

 elongate, the middle one extending back and joining the posterior one on its 

 outer side, the effect being to form a broken posterior fascia on the convexity. 



Pygidium brown with yellow apical spots. Body beneath red-brown, the 

 last ventral segment more or less yellow. Femora yellow with dark rings; 

 tibiae brownish yellow, paler at base. 



Length 4 to 4.75 mm.; width 2.2 to 2.7 mm. 



Distribution. — Arizona: Bowditch reports it from Baboquivari Mountains, 

 Santa Rita Mountains, Douglas and Prescott. Specimens are l)efore me from 

 the first two named localities from the Snow and National Museum Collections 

 respectively, also from the Huachuca Mountains (Beyer), and a specimen 

 from ^^'ickham labeled "Riverside to Tucson." 



67. Pachybrachys turbidus LeConte 



Medium to large, yellow with red-brown markings which ma^- 

 become nearly black on the elytra; elytral striae deep with convex 

 intervals; surface shining though minutely alutaceous; front 



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



