305 



With a series of eleven specimens of both sexes before us we 

 are unable to add to this description except by noting the position of 

 the first pair of spurs on the hind tibiae in contrast to the preceding 

 species, as noted in the key. Our specimens are from Denver, Chimney 

 Gulch and South Park, Colo., taken by Oslar. Only two are dated, 

 one June 23 from Chimney Gulch and one Aug. 19 from South Park. 

 We have seen a single 9 labelled Hessville, Ind.. Sept. 8. which was 

 submitted by Mr. A. K. Wyatt for identification. 



5. Pterophoku.s NiNGORis Walsingham. PI. XLI, fig. 7. PI. XLIX, 



fig. 6. 

 Ox-yft'ltts ningoris Walsingham, Pter. Cal. Ore. 26, pi. II, f. 6, 1880. 



Fernald. Smith's List Lep. N. A. 88, 1891. 



Id., Pter. N. A. 20, pi. VI, ff. 1-3, 1898. 



Id., Bull. 52 U. S. N. M. 442, 1902. 



Dyar, Proc. U. S. N. M. XXVII, 923, 1904 (biol.). 



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



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



Meyrick, Gen. Ins. C, 7, 1910. 



Id., Wagner's Lep. Cat. pars 17, 8, 1913. 



Barnes & McDunnough, Check List ISO, 1917. 



Britton, Ins. Conn. 103, 1920. 

 %Oxyptilus nigoris Murtfeldt, Proc. Nat. Sci. Club, 13, 1896. 

 Oxyptilus hernardinus Grinnell, Can. Ent. XL, 315, 1908. 

 Oxyptilus raptor Meyrick, Wagner's Lep. Cat. pars 17, 8, 1913 (in part). 



Barnes & McDunnough, Check List 150, 1917 (in part). 

 General color dull brown with a grayish cast, due to the presence of true 

 brown only at the tips of the scales. Head with a few whitish scales. Antennae 

 light spotted above, otherwise dark. Palpi rather long and slender, oblique, 

 dark brown with both joints white-tipped. Fore and middle legs white striped 

 with brown, the tarsi largely brown on their inner surface. Hind legs pure 

 white with the usual bands at the bases of tlie spurs and on the joints of the 

 tarsi. Tibiae also with an incompletely spiral brown line preceding spurs. 

 First spurs attached about three-fifths from base of tibia and reaching its tip. 

 Abdomen with many white scales and a pair of subdorsal stripes made up of 

 divergent dashes on e.ich segment. Beneath mostly white, due to anastomosis 

 of longitudinal white stripes. 



Fore wings usually with a somewhat hoary appearance, sometimes accen- 

 tuated by the presence of white and fuscous scales, particularly along the costa. 

 First lobe crossed by the usual two lines, the outer slender, the inner broad. 

 Both arc continued on the second lobe, but are ven,' variable, sometimes exten- 

 sive and sometimes greatly reduced. The outer line reaches the anal angle in 

 well marked specimens. Cleft preceded by a few white scales, and disk with 



