395 



curves outward toward costal patch and is preceded by some black scales. 

 Other black scales form a broken basal dash below cell and line the margins 

 of both lobes near base of cleft, the inner rather slightly, the costal usually 

 heavily. Fringes whitish on costa, with a light brown patch at apex preceded 

 by a similar but smaller patch; on inner margin ochreous-gray, in cleft dark 

 brownish gray in marked contrast with wing. Secondaries and their fringes 

 gray-brown, very evidently darker than primaries. Expanse 29-30 mm. 



Described from three specimens. Holotype 3 , Redington, Ariz., in coll. 

 Barnes. Allotype and paratype $, Bear Wallow Trail, Santa Catalina Mts., 

 Ariz., July, in Am. Mus. 



The type is in rather good condition but lacks hind legs, while 

 the allotype and paratype are in poor condition, but supply this defi- 

 ciency. The species is very similar in appearance to poUux, but is 

 at once distinguished by its tufted tibiae and the dark fringes in the 

 cleft of the primaries. None of the types bear biological data. 



12. OlD.'\EMAT0PH0RUS POLLUX n. sp. PI. XLVII, fig. 11. PI. LII, 



fig. 1. 



Head, thorax and abdomen whitish, tinged with gray-brown, sometimes 

 distinctly yellowish. Abdomen with two subdorsal parallel white stripes, some- 

 times inconspicuous. Antennae and palpi white, the latter moderate, oblique. 

 Legs white. First two pairs with tibiae and femora, and to a certain extent 

 tips of tarsal joints, infuscated. No tibial tufts. 



Primaries white to pale yellowish white, costa from base to apex tinged 

 with gray-brown and with a blackish dash above base of cleft, followed by one 

 or two dots in a few specimens. Extreme apex of first lobe blackish, sometimes 

 continued through fringes in a dark pencil. Apex of second lobe with a black- 

 ish streak along vein Mg, continued through fringes. At a short distance before 

 cleft is a small subtriangular brownish black spot, concave outwardly as it 

 curves toward costal spot. There is sometimes a dot at middle of cell. The 

 wing is sparsely sprinkled with dark scales which tend to collect along the 

 veins and inner margin, and to obscure the base of the costa. Fringes con- 

 colorous except as mentioned. Secondaries and fringes gray brown, as a rule 

 conspicuously darker than primaries. Expanse 27-33 mm. 



Described from 25 specimens. 



Holotype $ and allotype from Paradise, Cochise Co., Ariz., Sept. and 

 Aug., in coll. Barnes. 



Twenty-three paratypes, three $ and twenty 9 , from Mohave Co., Para- 

 dise, Palmtrlee and Prescott and the Baboquiviiri and Chiricahua Mts., Ariz., 

 Apr., July to Oct. distributed as follows: 1 c5 and 19 U. S. N. M. type No. 

 23466, 1 9 coll. Fernald, 1 9 coll. Meyrick, 1 9 Cambridge Museum ; remainder 

 in coll. Barnes. 



This beautiful species is placed here with some misgivings, since 

 the smooth tibiae would seem to indicate a lower position in the genus. 



