454 AMERICAN PACHYBRACHYS (COLEOPTERa) 



Distribution. — Arizona: Bright Angel, July 5 (type cf ); July 14 (Barber and 

 Schwarz); Santa Rita Mountains, June and July (Snow); "Ari" (Horn Coll.); 

 {Morrison — Nat. Mus. Coll.). Utah: American Fork, June 24 (Hubbard & 

 Schwarz); Salt Lake, June 13 (Hubbard & Schwarz). Colorado: (Leng Coll.); 

 Ft. Collins, June 8 (Wickham Coll.) (also in Liebeck Coll.); Platte Canon, 

 June (Dyar and Caudell — Nat. Mus. Coll.). Texas: Fedor; Tex. (Belfrage — 

 Nat. Mus. Coll.); Chisos Mountains July 16, and Round Mountain (Wenzel). 



Var. imperfectus new variety 



In this variety or race the markings are precisely of the same 

 type but in nearly all specimens seen are of some shade of brown 

 rather than black, and are narrower and more or less imperfect, 

 or even in great part obliterated. The eyes appear to be slightly 

 •closer in both sexes, their distance apart in the male being not 

 greater than the vertical width of their upper lobes, or barely 

 twice the length of the basal antennal joint, while in typical van 

 they are a little more widely separated than the width of their 

 upper lobes and by fully or rather more than twice the length of 

 the basal joint of the antennae. The elytra are also finely trans- 

 versely wrinkled and less shining than in van, in which the sur- 

 face is more highly polished. The antennae seem even a trifle 

 shorter than in van but this may be illusory. The scutellum is 

 largely yellow. Size as in vau. 



Distribution. — Texas: (Belfrage in Nat. Mus. Coll.); Flatonia, July .30 (Wen- 

 zel), type cf ; Macdona, July 28 (Wenzel) ; Lee Co., July 2 (Birkrnann) ; Cj'press 

 Mills, Sept. 1, and New Braunfels (Leng Coll.). 



137. Pachybrachys umbraculatus Suffrian 



Pale dull yellow, minutely alutaceous but somewhat shining; 

 prothorax with a blackish Y shaped median vitta and a lateral 

 vitta each side inclosing (as usual) somewhat imperfectly an 

 external pale spot; elytra each with a rather narrow blackish 

 median vitta often imperfect or even nearly obsolete, also with 

 the extremities of a second vitta represented by a blackish spot 

 on the shoulder knob and another on the sixth interval exterior 

 to the apex of the median vitta. Front without ocular lines; 

 front claws of male not enlarged. Ave. length 3.7 mm. Arizona 

 to western Texas. 



Head not very closely, subevcnly punctate, black markings small; eyes in 

 the male separated by about one and three-fourths times tlie length of the 

 basal antennal joint or by a little more than the vertical width of their upper 

 lobes, in the female by twice the length of the basal joint. Antennae {(f) 



