381 



1. OiDAEMATOPHORUS occiDENTALis Walsingliam. PI. XLV, fig. 7, 

 8. PI. LI, fig. 1. 



Oedematophorus occidcntalis VValsingham, Pter. Cal. Ore. i7, pi. II, ff. 13, 14, 

 1880. 



Dimmock, Psyche III, 403, 1882. 



Hy. Edwards, Bull. 35, U. S. N. M. 137, 1889. 

 jAlucita cretidactyla Femald, Smith's List Lep. N. A. 87, 1891 (in part). 

 \Pterophorus cretidactylus Dyar (not Fitch), Psyche VIII, 250, 1898 (biol.). 



Fernald, Bull. 52 U. S. N. M. 446, 1902 "(in part). 



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



Meyrick, Gen. Ins. C, 17, 1910 (in part). 



Id., Wagner's Lep. Cat. pars 17, 25, 1913 (in part). 



Barnes & McDunnough, Check List 151, 1917 (in part). 

 Stcnoptilia californica Grinnell, Can. Ent. XL, 321, 1908. 



Meyrick, Wagner's Lep. Cat. pars 17, 30, 1913. 



Barnes & McDunnough, Check List 151, 1917. 

 Head, thorax and abdomen creamy white to dull tawny-brown ; head with 

 a pale patch between antennae, otherwise the darkest part ; thorax paler behind, 

 with whitish lateral stripes; abdomen laterally darker near middle. Antennae 

 with brown dots above. Palpi rather small, oblique, whitish below at base; 

 second joint thickened, white tipped. Legs whitish with more or less evident 

 bands at tips of joints, lacking in very pale specimens. Front tibiae with a 

 heavy double tuft of brown scales in terminal half, mid-tibiae with heavy median 

 and terminal tufts of the same color. Inner spur of median pair on hind 

 tibiae almost twice as long as outer. 



Primaries concolorous with thorax, normally with a heavy brown costal 

 mark over base of cleft, preceded and followed by a few whitish scales. This 

 patch is connected with a small brown triangular shade before cleft. The wing 

 is marked with cloudy brown areas and the first lobe is light brown, but these 

 areas are not conspicuously powdery, due to the lack of contrast between the 

 brown scales and tawny ground color. Fringes even tawny-gray. Secondaries 

 brownish, shining, with paler fringes. 



The species is extremely variable, tlie primaries being creamy-white in 

 some specimens with only the oblique shade before the cleft evident, and some- 

 times without the costal dash. One which we include here has tawny-brown 

 primaries with no definite mark but otherwise shows the characters of this 

 species. Normal series .show a wide range of variation of the ordinary markings. 

 Expanse 26-29 mm. 



Distribution: B. C, Ca!., Ariz., Utah, June to Sept. 



The type series of occidcntalis was taken in Colusa, Shasta and 

 Siskiyou Co., Cal., in July and Aug. Four of the "types" are in the 

 Fernald collection. Grinnell's series of californica, now in the South- 

 west Museimi, contains specimens from the San Bernardino Mts. and 



