374 Field Museum of Natural History — Zoology, Vol. VII. 



states. The only points known where both species occur are as 

 follows: Custer and Englewood, South Dako+a (Haggard collector); 

 War Bonnet and Monroe canyons in Sioux County, and Pine Ridge, 

 Nebraska. 



The smallest specimen (6.7 mm.) seen by the writer is from War 

 Bonnet Canyon, Nebraska, while the largest (14.5 mm.) is from 

 Pike's Peak, Colorado, 10,000 ft. el., July 20 (L. Brunner). 



Occurs in South Dakota, Nebraska, Alberta, Montana, Idaho, 

 Wyoming, Colorado, Utah, Nevada, New Mexico, Arizona, Cali- 

 fornia, Oregon, Washington and north to Vancouver Island. 



Trichodes bimaculatus LeConte. 



Trichodes bimaculatus Lee, Trans. Amer. Ent. Soc, v, 1874, p. 63. 



Trichodes hisignatus Horn, (err. cler.). Trans. Amer. Ent. Soc. 

 V, 1876, p. 231. 



Moderately robust, dark blue, shining, clothed with moderately 

 long, erect, soft, yellowish pubescence. Antennas black, basal joints 

 sometimes pale testaceous; palpi testaceous. Head rather sparsely 

 and moderately finely punctate. Thorax subquadrate, strongly con- 

 vex; sides anteriorly very feebly constricted, posteriorly feebly com- 

 pressed; rather coarsely, rugosely punctate; a narrow median space 

 near base smooth. Elytra densely, coarsely punctate; punctures 

 substriate near suture; blue with a rounded reddish yellow spot at 

 middle, contiguous with the lateral flanks. Body beneath, abdomen 

 and legs blue. Length 8.5-10 miUim. (Elytral markings, pi. VI, 

 fig. 28.) 



Most closely related to nuttalli Kirby, from which it differs in 

 having the club of antennae broadly triangular, the head more sparsely 

 and the thorax more coarsely punctate and the dissimilar elytral 

 markings, which in nuttalli are rather constant. From ornatus Say, 

 to which it is also allied, it may be separated by the elytral color 

 markings, which are always contiguous with the flanks in bimaculatus, 

 and the more strongly convex thorax, which is less compressed near 

 apex and towards base. 



Known only from California (Pasadena, in author's collection), 

 and Oregon. 



Trichodes nuttalli Kirby. 



Clerus Nuttalli Kirby, Trans. Linn. Soc. London, xii, t8i8, p. 394. 



Trichodes Nuttalli Say, Best. Jour. Nat. Hist., i, 1835, p. 164, 



Klug, Abb. Berl, Akad., 1842, p. 337 ; Spin., Mon. Cldr., i, 1844, 



