432 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



to six more or less broken or confused at middle; shield small; standard spots 

 small. 



Pygidium^ dark brown and yellow, the latter color predominating. Body 

 beneath fuscous with tip of abdomen pale. Legs pale, with small median 

 brownish femoral and tibial spots or shades. 



Length 2.5 to 2.6 mm.; width 1.35 to 1.4 mm. 



Distribution. — Arizona: Santa Rita Mountains, type, male (Snow); Chiri- 

 cahua Mountains, July 1 (Hubbard & Schwarz); Williams, July 1 (Barber & 

 Schwarz); "Ari" (Morrison— Nat. Mus. Coll.), (Am. Ent. Soc. Coll.); Miller 

 Cafion, Huachuca Mountains, July 10 to 21 (Wenzel); Oak Creek Canon, one 

 male. Snow Coll., doubtfully referred. New Mexico: Socorro, Aug. 1894 

 (Snow), one male doubtfully referred; Near Las Vegas Hot Springs (Snow), one 

 male doubtfully referred. Texas: Chisos Mountains, July 16 (Wenzel). 



In a second male from the type locality and evidently specifi- 

 cally identical with the type, the eyes are perceptibly more dis- 

 tant, being separated by slightly more than the vertical width of 

 their upper lobes. It is because of this variation that I have 

 placed here the doubtfully referred specimens above mentioned. 

 In all of these the eyes are nearly as in the second Santa Rita 

 male. In the Socorro and Oak Creek examples the elytral 

 markings are more heavy than in the type, while in the Las 

 Vegas Hot Springs one they are almost wanting. These doubtful 

 specimens vary from the type in the direction of nogalicus, of 

 which I have a very homogeneous series collected at Nogales, 

 Arizona, by Mr. Nunenmacher. These latter differ by the eyes 

 being still a little more widely separated, the markings heavier 

 than in typical precarius, the sides of the prothorax a httle more 

 strongly rounded, and the point of maximum width seems in 

 most specimens to be farther from the base. The two species are 

 certainly closely allied and further collecting may fill the gap 

 between them. 



11.3. Pachybrachys nogalicus new species 



Pale yellow with rather sharply defined black markings; pro- 

 thoracic M broad, elytral spots small to moderate; eyes rather 

 distant, front without ocular lines, front claws of male not en- 

 larged. Ave. length 2.7 mm. Arizona. 



Head as wide as the thoracic ape.x, front closely punctate, markings broad. 

 Eyes {&) separated by twice the length of the basal antermal joint or slightly 

 more, in the female by about three times the length of the basal joint, .\nton- 

 nae about three-fourths as long as the body in the male, outer joints blackish. 



