400 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



Concord (Wenzel Coll.). New York: Buffalo (Leng and Nat. Mus. Colls.); 

 "N. Y." and vicinity N. Y. City (Van Dyke Coll.). New Jersey: Anglesea 

 (Wenzel); July 3 (Liebeck); "Atl H," June 18 (Leng). Florida: Duval Co. 

 (Leng Coll.). Ontario: Sudbury (Evans); Toronto (Crew?); Scotia Junction 

 (Wenzel); "Can" (Van Dyke Coll.). Michigan: Isle Royal, July 11; Bache- 

 wanung Bay, Aug.; Detroit; Marquette, July 3 (all Hubbard & Schwarz); 

 "iNIich" (Liebeck Coll.) (Dury Coll.). Wisconsin: Bayfield (Wickham); "Wis" 

 (Linell in N. Mus. Coll.). Minnesota: Duluth (Casey). Indiana: (Liebeck 

 Coll.) (Van Dyke Coll.). louxi: Iowa City, May 23 and Des Moines, July 4 

 (Wickham); Council Bluffs, July 23 (Shoemaker — in Wickham Coll.). Mis- 

 souri: (Nat. Mus. Coll.). Kansas: Medora, May (Knaus); Mt. Hope, June. 

 Nebraska: McCook (Wickham); West Point (Nat. Mus.); "Neb." (Nat. Mus.) 

 (Snow Coll.). South Dakota: Volga (Truman). North Dakota: Fargo (H. 

 Osborn in Nat. Mus. Coll.); Bi,smarck; Devil's Lake, June 6 to 7, and Williston, 

 June 9 to 10 (Wickham). Manitoba: (Am. Ent. Soc. Coll.); Aweme, July 27 

 (Leng Coll.); Winnipeg (Wickham Coll.). Montana: Helena, July 7 (Mann); 

 Kalispell, June (Wickham); Assiniboine, Aug. 21 (Hubbard <t Schwarz); 

 "Mont"' (Nat. Mus.). Wyoming: Laramie, June 2 (Knaus); Big Horn, 

 July 9 (Soltau in Nat. Mus. Coll.); "Wyo." (Snow Coll.). Colorado: Greeley 

 (Wickham); Denver, July 7 (Nat. Mus.), May 9 (Sohau in Nat. Mus. Coll.). 

 Colorado Springs, Aug. 27, (Soltau), June (Wickham) ; Pueblo, May 20 (Soltau) ; 

 Ft. Collins (Liebeck); Pikes Peak, 9-10,000 ft. (HornColl.); Buena Vista (Wick- 

 ham — -in Horn Coll.). Texas: El Paso (Fenyes). New Mexico: Santa Fe, 

 Aug. (Fenyes); Pecos, July 1 (Cockerell); Jemez Springs (Nat. Mus.); Albu- 

 querque, June 29 (Wickham); Las Vegas Hot Springs, Aug. 2 (Barber & 

 Schwarz). Utah: Utah Lake, June 20; Wahsatch Mountains, June 29; Ogden, 

 July 3 (all Hubbard & Schwarz). Oregon: Huntington (Hubbard & Schwarz). 



82. Pachybrachys signatifrons jVIannerheim 



Diagnostic characters same as in )nelanost ictus, verj' dark examples of which 

 are not with certainty separable and probably are not distinct from the present 

 species. According to the original description of Mannerheim, signatifrons 

 is black, with frontal spots, side margins of thorax, basal and humeral margins 

 of elytra, and the femora at base flavo-ferruginous. From this typical colora- 

 tion, variation occurs in both directions; the small yellow marks may become 

 still further reduced or in part entirely lost, though I have never seen an en- 

 tirely black specimen. The spots on the head, though variable in extent are 

 quite persistent, and traces at least of yellow are almost invariably present on 

 the raised basal edge of the elytra. The prothorax is usually punctured to the 

 extreme side margin, and when most closely so the yellow margin entirely 

 disappears. From this condition there is every possible gradation to the 

 smooth entirely pale side mai-giii in tyi)ical melanostictus. The front claws of 

 the male are only feebly enlarged in signatifrons, a little more obviously so in 

 t,yi)ical melanostictus, but the difference is very slight and also gradational, 

 some specnnens or races of nwhinosticttis differing scarcely at all in this respect 

 from signatifrons. There ap|)car to l)e no other marks of distinct ion. 



