406 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



Length 2.25 to 3.2 mm.; width 1.2 to 1.7. 



Distribution. — California: The male tj-pe ^'as collected by Mr. Geo. H. 

 Field at Alpine (foothills back of San Diego) in July; the female type is from 

 San Diego, May. Other examples before me from San Dimas, Jan. 6; Poway 

 (Blaisdell) and Catalina Island, July 11, differ in having the yellow of a brighter 

 tint but are ahnost certainly identical. 



88. Pachybrachys mobilis new species 



Pale yellow with standard spots variably developed, brown to 

 fuscous; eyes more distant in the male than the vertical width 

 of their upper lobes; front without ocular lines; punctuation 

 rather dense, the elytral striae more or less distinct behind and at 

 sides, marginal interspace punctate; front claws of male evi- 

 dently though not strongly enlarged. Ave. length 3.3 mm. 

 Southern California to Colorado and western Texas. 



Head moderately closely punctate, less closely in the paler portions, the 

 vertex spot large, frontal spot moderate, not very sharply defined. Eyes 

 separated by nearly twice ( c? ) or nearly three times ( 9 ) the length of the basal 

 antennal joint. Antennae pale at base, fuscous apically, three-fourths (cf ) 

 or two-thirds ( 9 ) the length of the body, the tenth joint in the male barely 

 three times as long as wide. 



Prothorax widest at basal third or fourth, sides broadly arcuate, nearly 

 straight and slightly convergent anteriorly, moderately closely somewhat 

 irregularly punctate, sides smoother; M diffuse and not well defined, reddish 

 brown and rather lightly marked, the color becoming somewhat more intense 

 posteriorly, forming three darker ill-defined spots along the basal margin. 



Elytra irregularly closely punctured in a rather large baso-sutural triangle, 

 the striae elsewhere more or less distinct, the fifth and sixth completely con- 

 fused before the middle, punctures generally denser and the striae less regular 

 in the female; shield distinct; marginal interspace more or less punctate; outer 

 standard spots usually distinct but as a rule rather small and a little diffuse; 

 anterior inner spot diffuse and indistinct, middle one small and ill-defined, 

 posterior spot better defined, often coalescent with the corres]5onding outer one. 



Pygidium t>-pically marked. Body beneath blackish, last ventral more or 

 less pale. Legs pale, femora and tibiae with dark rings. 



Length 2.75 to 3.8 mm.; width 1.4 to 2 mm. 



Distribution. — California: San Bernardino Mountains, Aug. 10 (o" type); 

 Siskiyou Co. (Koebele in Nat. Mus. Coll.). Anzona: Williams, July 3 to 5; 

 Wahiut, July 22 (Wickham) ; Hot Springs, June 24 to 26, and Oracle, July 5 to 6 

 (Barber and Schwarz); Nogales, Aug. 12 to Sept. 13 (Nunenmacher) ; Santa 

 Rita Mountains, May 26 to June 2 (Hubbard & Schwarz). Colorado: Colo- 

 rado Springs, Aug. 27 (Soltau— Nat. Mus. Coll.). Texas: Chisos Mountains, 

 July 16 (H. A. Wenzel), one female seems to be identical with the Nogales 

 form 



The somewhat numerous specimens here included exhil)it a 



