448 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



male not appreciably enlarged. Ave. length 4.5 mm. Inhabits 

 the greater part of the United States. 



Head barely as wide as the thoracic apex, densely or closely punctate in the 

 frontal impression and dark areas, elsewhere more sparsely so; markings very 

 variable in extent and depth of color; eyes separated by one and three-fourths 

 (more or less) times the length of the basal antennal joint in the male, and by 

 about two and one-half times the length of the basal point in the female, the 

 distance in the latter sex being always somewhat less than the vertical length 

 of the eye. Antennae reaching the middle of the elytra in the male, shorter in 

 the female, black beyond the middle, tenth joint barely or scarcely three times 

 as long as wide. 



Prolhorax subconical in the male, the sides feebly arcuate, a little more 

 rounded behind in the female; punctuation fine and not very close, side mar- 

 gins narrowly smooth or nearly so; M rarely defined, the entire disk usually 

 suffused with rufous or brownish, leaving the side margins and not infrequently 

 a narrow anterior median line pale. 



Elytra confusedly punctate in baso-sutural region, striae not or scarcely im- 

 pressed, submarginal distinct, the others less so; marginal interspace wide, and 

 impunctate except near the base; shield wanting. The elytra may be 

 described as bivittate with the outer vitta rarely if ever entire, usually inter- 

 rupted to form three spots, of which the median one is often small or wanting 

 and that on the humeral knob less often absent; the sutural bead and the 

 greater part of the lateral edge back of the lobe are black in fully colored exam- 

 ples. 



Pygidium yellow with base blackish. Body beneath brown to black, with 

 apex and sometimes sides of abdomen pale. Legs rufo-testaceous, the tarsi 

 becoming darker. 



Length 3.9 to 5 mm.; width 1.8 to 2.7 mm. 



Dislribution. — New Hampshire: (Fenyes); Hudson (Blanchard); Franconia 

 (Mrs.A.T.Slosson). New York: (Nat. Mus. Coll.). Pennsylvania: (Wonzel). 

 Maryland: Glymont, May 25; Pope Creek, May 22 (both collected by Griffith 

 — Liebeck Coll.). Virginia: (Nat. Mus. Coll.), (Beyer Coll.). Ohio: Cincin- 

 nati, June 29 (Dury). Indiana: (Soltau— in Nat. Mus. Coll.); Wells Co., 

 July 14 (Liebeck Coll.). Ulinois: Algonquin, June 19, July 7 (Nason); Bloom- 

 ington, June 8 (Wickham Coll.); "C. 111." (Nat. Mus. Coll.). Wisconsin: 

 (Leng Coll.). North Dakota: Fargo (Soltau— Nat. Mus. Coll.); Wilhston 

 (Wickham). South Dakota: Volga (Truman — Wickham Coll.). Nebraska: 

 Sand Hills (Bruner — Nat. Mus. Coll.). Kansas: Douglas Co. and Hamilton 

 Co. (Snow); McPherson, Benedict and "So. Kans" (Knaus). Texas: (Nat. 

 Mus. Coll.); Austin, June 28 (Soltau— Nat. Mus. Coll.); New Braunfels (Lie- 

 beck Coll.); Round Mountain, and Davis Mountains, July 7 (Wenzel). Mo7i- 

 tana: (Leng Coll.). Colorado: Colorado Springs, June 15 to 30 (Wickham); 

 Canon City (Wickham) ; Denver, July 7 (Hubbard & Schwarz); "Col" (various 

 collections). New Mexico: Silver City (Dury); Pecos, June 17 (Cockerell). 

 Arizona: Grand Canon of Colorado, July 13 (Barber & Schwarz); Cosnino 

 Canon (Horn Coll.); Winslow (Leng Coll.); San Bernardino Ranch, Cochise 

 Co. (Snow); Chiricahua Mountains, May 30 to June 8 (Clemence); Prescott 



