462 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



Head scarcely wider than the thoracic apex, but the eyes are usually a little 

 prominent as viewed from above ; front opaque, not very closely punctate. Eyes 

 separated in the male by fully three times the length of the basal antennal 

 joint or by a distance greater than their own vertical length, in the female by 

 nearly or quite one and one-half times their vertical length. Antennae moder- 

 ate, black, obscure brownish red toward the base, tenth joint scarcely two and 

 one-half times as long as wide in the male. 



Prothorax moderately transverse {cf), or more strongly so ( 9 ), punctuation 

 rather dense, not coarse, nearly uniform in distribution. 



Elytra conspicuously more coarsely jounctate than the thorax, punctures 

 confused medio-basally, elsewhere arranged in moderately impressed lines, 

 which may be either quite regular or considerably confused ; submarginal stria 

 straight or but slightly sinuate basally, marginal interspace with few to many 

 punctures; shield not distinct; color usually entirely black, very rarely with the 

 elytral margin at apex in part rufous. 



Legs black in general aspect, but with the tips of the femora and the tibiae 

 obscurely brownish. 



Length 2.5 to 3.75 mm.; width 1.35 to 1.85 mm. 



Distribution. — New York: Peekskill (Sherman); Van Cortlandt, July 2, 

 (Zabriskie— Nat. Mus. Coll.); "vicinity of New York City" (Beyer); N. Y. 

 (leng Coll.). New Jersey: (Nat. Mus. Coll.); Da Costa; Westville, Aug. 14 

 (Wenzel). District of Columbia: Washington, May to June (Hubbard & 

 Schwarz). Georgia: Tybee Island, July 2 (Wenzel). Florida: Tampa, May 

 21, and New Smyrna, June (Hubbard & Schwarz). Alabama: Mobile, April 

 to July (Loding) ; Wadley (H. H. Smith — Nat. Mus. Coll.). Louisiana: Ver- 

 non Parish (Leng Coll.). Arkansas: Howard Co. (Wickham). Missouri: 

 (Nat. Mus. Coll.), (Liebeck Coll.); St. Louis (Nat. Mus. Coll.). Kentucky: 

 (Am. Ent. Soc. Coll.). Illinois: Algonquin (Nason) ; So. 111., May 26 (Soltau). 

 Michigan: Marquette, July 8 to Aug. 1. (Hubbard & Schwarz). Minnesota: 

 Jackson Co., June (W. S. Marshall — Nat. Mus. Coll.). Kansas: Baldwin 

 (Wickham Coll.); Onaga (Wickham Coll.); So. Kans. (Knaus); Douglas Co. 

 (Snow) identity doubtful. Nebraska: Fillmore (Am. Ent. Soc. Coll.). 



Var. janus new variety 



Specimens from Nebraska (type 9 ), Dakota, Montana, Colo- 

 rado, and Manitoba (Brandon), differ more or less obviously from 

 typical carbonarius of the South and East by the more shining 

 surface — especially of the prothorax — of which the alutaceous 

 sculpture is less pronounced. This form Hes exactly between 

 typical carbonarius and nigricornis and merges into both so 

 gradually that I am as yet completely unable to draw the dividing 

 lines. The difficulty of separating nigricornis from the dark 

 varieties of autoiycus has already been alluded to, and as these 

 varieties connect gradationally with the typical form, there 

 results a gradual transition from the bright yellow, black vittate 



