6 PROCEEDINGS OF THE NATIOoSTAL MUSEUM vol. 79 



Tyfe locality. — British Columbia. 



Food fla/nt. — Unknown. 



Remarks. — Described from male type and one male paratype from 

 British Columbia but without definite locality label (" 9-7-25 " and 

 "9-8-25," Biackmore Nos. 85 and 86); one male paratype from 

 Saanichton, British Columbia (" 31-VII-1922," John G. Colville, 

 "397 ") ; one male paratype from Departure Bay, British Columbia 

 (" 21-7-08," Biackmore No. 598) ; one male paratype and one female 

 paratype from Quamichan Lake, Vancouver Island (" 16-VII-22 " 

 and "'ll-VII-08," Biackmore Nos. 399 and 398). 



The new species is at once distinguished by its exceptionally dark 

 hind wings. A. gigantalis Barnes and Benjamin, the darkest of pre- 

 viously described species, shows more contrast in fore and hind wings 

 and is a much larger insect. The genitalia of the various AgJossa 

 are quite similar, displaying slight but apparently consistent differ- 

 ences. A. cuprlal'is Hiibner has a narrow, distinctly chitinized trans- 

 tilla lacking in the other species. The harpes of cupHalis., cuprina 

 Zeller, and haba Dyar are broader and more abruptly tapering 

 toward apex. The aedoeagus is at least one-third shorter in propor- 

 tion to its diameter in haha than in cuprma, cupri^dis, or furva; while 

 acallalis Dyar has an aedoeagus of different shape from that of all 

 the other species, the organ being much more slender on basal three 

 quarters. A. oculalis Hampson (from Texas) I do not know. This 

 species, however, has pale hind wings. 



Family OLETHREUTIDAE 



Subfamily LASPEYRESIINAE 

 GYMNANDROSOMA DESOTANUM Hcinrich 



Plate 5, Figure 18 



Remarks. — In addition to the original female paratype we now 

 have in the National Museum collection two males and a female from 

 Miami Beach, Fla., reared by T. E. Snyder, June 30, August 10, and 

 July 21, 1916, from larvae feeding in red-mangrove seed. The males 

 have the secondary characters (tufted hind tibiae and hair pencil) 

 decidedly less developed than those of py/nctidkcaimim Dyar. Vein 5 

 of the hind wing is also appreciably bent toward the base in both 

 sexes. The male genitalia, however, show that desotanuin must be 

 associated with pnmctidiscanum, the only striking difference being in 

 the shape of the cucullus of the harpe. This is shorter and has more 

 of a projection at neck in desotanum than in Dyar's species. 



Male genitalia figured. 





