333 



The primaries vary from ochreous buff to white or dull grayish. 

 The dark triangle is always present, brown to dark brownish gray, 

 continued in a white-dotted costal stripe toward base. Lobes crossed 

 by pale line and triangle followed by a pale shade, the included space 

 with a brown or gray shade, rarely with the dark dashes of orthocarpi 

 indicated by a few dark scales. Terminal area hoary. Fringes as in 

 orthocarpi. Spot in cell and near base and middle of inner margin 

 variable. We regard orthocarpi as properly included in this group, 

 but give a separate description of it because the typical form is so 

 distinct. As in that species, the genitalia of the three following re- 

 semble those of Carolina but have a broadly spatulate uncus. 



15. Platvptili.\ fragilis Walsingham. PI. XLIII, fig. 5. 

 Platyt'tihis fragilis Walsingham, Pter. Cal. Ore. 16, pi. 1, f. 12, 1880. 

 Platyftilia frayiUs Fernald, Smith's List Lep. N. A. 87, 1891. 



Id.. Pter. N. A. 28. 1898. 



Id., Bull. 52, U. S. N. M., 443, 1902. 



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



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



Meyrick, Gen. Ins. C, 11, 1910. 



Id., Wagner's Lep. Cat. pars 17. 14, 1913. 



Barnes & McDunnough, Check List 150, 1917. 

 iSteiwptUia coloradcnsis Grinnell, Can, Ent. XL, 321, 1908 (in part). 



In this fonn the general color is more or less huff or hrownish, the marks 

 of the primaries usually all present and well marked. The fore and middle tibiae 

 are definitely striped, and the hind tibiae and tarsi usually with evident dark 

 bands on a whitish ground. Expanse 20-24 mm. 



Distribution : Ariz., Cal., Wash, east to Colo. July, Sept. 



Brightly marked specimens of this group with bufif or brownish 

 appearance and conspicuous maculation may safely be placed here. 

 The doubtful specimens mentioned under orthocarpi may belong to 

 this form. 



16. Platyptilia albida Walsingham. PI. XLIII, fig. 6. 

 Platyptilus albidus Walsingham, Pter. Cal. Ore. 10, pi. I, f. 8, 1880. 

 tPlaiyptiUa albida Fernald, Smith's List Lep. N. A. 87, 1891. 



Id., Pter. N. A. 29. pi. VIII, ff. 10, 11, 1898. 

 Id., Bull. 52 U. S. N. M. 443, 1902. 

 Meyrick, Gen. Ins. C, 11, 1910. 

 Id., Wagner's Lep. Cat. pars 17, 15, 1913. 

 Barnes & McDunnough, Check List 150, 1917. 

 In albida the legs are marked as in fragilis and the wings show about the 

 same dark areas, but of a much colder shade of brownish-gray, almost black. 



