390 



The male genitalia have well developed tufts on the outer surface of the 

 valves, and other features as well indicate closer relationship to eupatorii than 

 to gutlatus. 



Holotype S , Ramparts, Alaska, July 17, 1916, U. S. N. M. No. 23472. 



Paratypc $ Ruby, Alaska, July 22, 1916, coll. Barnes. 



This species cannot, for various reasons, be involved in the con- 

 fusion attending those preceding it. 



7. OiDAEMATOPiiORUs GRiSESCENs Walsingham. PI. XLVII, fig. 13. 

 PI. LIV, fig. 4. 



Oedematophorus griscsceus Walsingham, Pter. Cal. Ore. 34, pi. 11, f. 11, 1880. 



Dimmock, Psyche III, 403, 1882. 



Hy. Edwards, Bull. 35 U. S. N. M. 136, 1889. 

 Alucita grisescens Fernald, Smith's List Lep. N. A. 87, 1891. 

 Ptcrophorus grisescens Femald, Pter. N. A. 55, 1898. 



Id., Bull. 52 U. S. N. M. 447, 1902. 



Dyar, Proc. Ent. Soc. Wash. V, 228, 1903. 



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



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



Walsingham, Biol. Cent.-Am., Lep. Het. IV, 446, 1915. 



Barnes & McDunnough, Check List 151, 1917. 

 Pterophorus acrias Meyrick, Trans. Ent. Soc. Lond. 500, 1908. 



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



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



Barnes & McDunnough, Check List 151, 1917. 

 Ptcrophorus behrii Grinnell, Can. Ent. XL, 319, 1908. 



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



Barnes & McDunnough, Check List 151, 1917. 

 Head clothed with gray-tipped white scales, white between antennae. An- 

 tennae with brown bars above. Palpi short, oblique, each joint white-tipped. 

 Thorax similar to head, dark tips of scales forming a band across thorax and 

 tips of patagia. Abdomen mostly white above and below, varying to light gray; 

 in brighter specimens with parallel black dashes above. Hind margins of seg- 

 ments with brown tipped scale tufts, forming the points of V-shaped brown 

 marks on fourth and fifth segments; sides brownish. Legs white, fore and 

 mid tibiae with conspicuous blackish tufts; tarsi variably annulate with dark 

 brown. 



Primaries narrow, heavily sprinkled with white and with some scattered 

 blackish scales. Ground color of inner half brown, of costal half apparently 

 gray brown, the scales tipped with white, but this area of the wing is grayish 

 white because of the predominating white scales in most specimens. Costa 

 with a gray-brown dash over base of cleft and two spots beyond. Cell pre- 

 ceded by a white patch and this by a small blackish spot curving forward to- 

 ward costal dash in slender line. Remainder of wing with variable vague 

 streaking and spotting of gray and white. First lobe with a black dot before 



