372 AMERICAN PACHYBRACHYS (cOLEOPTERa) 



marginal punctures, body below very dark brown, with the usual parts picked 

 out in dark red, legs light reddish yellow, with light ends to femurs and shanks. 



"One (f, Leeds, Utah. Type coll. Bowditch. 



"As compared with longus the thorax is more transverse and not as long; 

 the eyes in proximus are much more distant and the antennae and body below 

 darker. The punctuation of the elytra is very similar." 



56. Pachybrachys nunenmacheri new species 



Yellow, with red-brown to dark brown standard markings 

 and brown elytral striae; eyes separated by a distance which is a 

 little less in the male, and a little greater in the female than the 

 vertical width of their upper lobes; front without ocular lines; 

 front claws of male moderately enlarged. Ave. length 2.9 mm. 

 Extreme southern portions of Arizona and California. 



Head not wider than the thoracic apex, markings rather broad, punctuation 

 uneven, close in the darker areas. Eyes separated by the length of the first 

 two antennal joints in the male, and by about two and one-half times the 

 length of the basal joint in the female. Antennae moderate, outer joints 

 darker, tenth joint three times as long as wide in the male, a little less elongate 

 in the female. 



Proihorax widest at basal two-fifths, obviously though not strongly narrowed 

 in front, sides rather strongly rounded posteriorly, incurved at base, not dis- 

 tinctly sinuate before the angles; the M moderate to heavy, more or less diffuse; 

 punctuation dense in the dark areas, elsewhere sparser, with small scattered 

 smooth spots of lighter color; side margins smooth. 



Elytra not very much wider than the prothorax, punctuation confused in the 

 baso-sutural region, striae two to four variable, one or more of these nearly 

 entire, five and six much confused except on the convexity, seven and eight 

 entire, the latter with the usual subbasal interruption; marginal interspace 

 impunctate or with but two or three punctures near the subbasal interruption 

 in the male, more numerously punctate in basal half in the female; shield 

 small, sometimes entirely undefined; spots rather small, those of the outer 

 series distinct, the middle and posterior inner spots usually more or less con- 

 fluent, the basal one sometimes wanting. 



Pygidium blackish brown with the usual confluent apical pale spots. Body 

 beneath brown with the last ventral segment and sometimes the sides of the 

 abdomen pale. Legs yellow, with median parts of femora and tibiae dark; 

 front thighs mostly dark with a small pale spot at middle. 



Length 2.7 to 3.1 mm.; width L4 to 1.75 mm. 



Distribution. — Arizona: Nogales (type cf ), Aug. IS to Sept. 22 (Nunen- 

 macher); Santa Rita INIts., 5,000 to 8,000 ft. (Snow). 



With the above I have associated two examples — male and 

 female — taken at or near San Diego, California, by Professor 

 Wickham. They have the elytral spots somewhat less dis- 

 tinctly marked, especially in the female, and in the male the eyes 

 are a little more prominent than the thoracic apex. 



