401 



The species is similar to pale specimens of fiddi but the evenly 

 colored thorax separates it at once from that species. Paler examples, 

 as the paratype in our possession, are easily confused with occidi'iitalis, 

 but differ in having only slight terminal tufts, no median, on fore and 

 mid tibiae. 



We have had no opportunity to examine the male genitalia, and 

 can give no data on the life history. 



18. OiD.\EMATOPiioRUS BRUCEi Fernald. PI. XLVI, fig. 8. PI. LI I, 



fig. 14. 

 Ptei-oflwrus brucci Fernald, Pter. N. A. 42, 1898. 



Id., Bull. 52 U. S. N. M. 445, 1902. 



? Forbes, Psyche XVI, 136, 1909. 



Anderson, Cat. B. C. Lep. 50, 1904. 



Dyar, Proc. U. S. N. M. XXVII, 924, 1904. 



B. C. Ent. Sec. Check List 42, 1906. 



Meyrick, Gen. Ins. C, 17, 1910. 



Id., Wagner's Lep. Cat. pars 17, 25, 1913. ^ 



Barnes & McDnnnough, Check List 151, 1917. 

 Ptcrophorus chionastcs Meyrick, Trans. Ent. Sec. Lend. 1907, 501, 1908. 



Id., Gen. Ins. C, 17, 1910. 



Id., Wagner's Lep. Cat. pars 17, 25, 1913. 



Barnes & McDnnnough, Check List 151, 1917. 

 White, palpi moderate, oblique, rather slender. Legs touched with fuscous 

 inside and at bases of spurs. Only a trace of scale tufts on fore and mid tibiae. 

 Primaries pure white with some scattered gray-brown scales. Costa with 

 a dash over base of cleft and a lighter one at middle of first lobe which does 

 not enter the fringes. Cleft preceded by a small elongate-triangular spot, some- 

 times connected with costal dash. There is a powdery spot in middle of cell 

 and three more or less vagiie powdery dashes in inner half of wing, the last 

 extending into second lobe from below triangular spot. Inner margin of first 

 lobe with a dot before ape.x. Outer margin of second lobe with some dark 

 scales. Fringes whitish, brownish gray in cleft except a white cluster before 

 apex of first lobe. The dark areas are sometimes greatly extended, and the 

 white parts touched with gray-brown, but all marks remain more or less powdery, 

 cloudy and indefinite except the triangular spot and accompanying costal dash. 

 Secondaries pale brownish gray, sometimes almost whitish, with slightly darker 

 fringes. Expanse 22-27 mm. 



Distribution: Alaska to Ariz., Colo., Manitoba. June to Aug. 

 Mass. (Forbes). Pa. (Cambridge Mus.) Vancouver Is. (Dyar). 



The three types of brucei are in the Fernald collection. One is 

 a male, and the others have broken abdomens. They were taken in 

 Colo, by Bruce. Chionastcs was also described from Colorado speci- 



