REVISION OF THE OECOPHORIDAE — CLARKE 89 



Labial palpus whitish ochreous, second segment irrorated with 

 blackish fuscous exteriorly; third segment with subbasal and supra- 

 medial bands blackish fuscous. Antenna fuscous. Head, thorax, 

 and fore wing light ochreous. Face shining light silvery ochreous; 

 head with light infuscation anteriorly; thorax and fore wing irro- 

 rated with blackish fuscous and shaded with fuscous; extreme base 

 whitish ochreous, with a single blackish fuscous spot in the fold and 

 followed by a rapidly fading fuscous shade; along costa and around 

 termen a series of blackish fuscous spots; at basal third, in cell, two 

 black discal spots, obliquely one above the other, followed by a fuscous 

 cloud; the latter is in turn followed by a blackish fuscous spot at end 

 of cell; cilia light grayish fuscous irrorated with wiiitish ochreous. 

 Hind wing grayish fuscous, cilia concolorous, with a slightly darker 

 basal band. Legs whitish ochreous ; fore and mid legs heavily over- 

 laid with fuscous except at joints; hind leg overlaid with fuscous on 

 femur with slight infuscation on tibia and tarsus. Abdomen fuscous 

 above; beneath whitish ochreous with broad, fuscous lateral line on 

 each side. 



Male genitalia. — Harpe almost entirely clothed with fine hairs; 

 cucullus rounded, with several long, coarse marginal hairs; 

 clasper straight, reaching just beyond middle of harpe; anellus 

 a moderately sclerotized plate (with the posterior edge convex), 

 with large sparsely hairy lobes laterally. Vinculum rounded, with 

 dorsoanterior process well developed. Aedeagus stout, slightly bent 

 about middle, and bearing a flat, sclerotized basal process by which 

 the aedeagus articulates with the anellus. Transtilla a narrow, lightly 

 sclerotized band. Gnathos a heavily spined cone. Socii flat, hairy 

 lobes. Terminal portion of tegumen pointed. 



Female genitalia. — Genital plate narrow. Ostium semicircular. 

 Ductus bursae membranous, becoming gradually larger to form the 

 symmetrical bursa copulatrix. Signum an oblong-oval, toothed plate. 



Alar expanse, 17-24 mm. 



Types. — In the United States National Museum. 



Type localities. — Kaslo, British Columbia {pallidella) ; Silverton, 

 Colo, (terinella) ; Pullman, Wash, {serrae). 



Food plant. — Senecio serra Hook. 



Disfrihution. — ^Western United States and southwestern Canada. 



United States records 



California: Warner Mountains, 3 miles east of Davis Creek, Modoc County, alt. 



5,500 feet, 2 $ $ and $ (VII-8 to 15-22, A. W. Lindsey). 

 Colorado: Silverton, 3 $ $ and 5 ( August 24-30 ) . 

 Utah: Stockton, 2 5 5 and 5 (VII-8-07, VII-30-13, VII-21-07, Tom Spalding) ; 



Warner Ranger Station, La Sal Mountains, 9,000 feet, (July 1933, A. B. 



Klots). 



