16 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.63. 



chaetae usually present on the third segment although sometimes re- 

 duced to erect bristly hairs; in some specimens discal bristles are 

 present on both of the intermediate segments. Legs usually black, 

 the tibiae sometimes yellow; mid tibiae with two strong bristles on 

 the outer front side near the middle; hind tibiae coarsely ciliate, 

 with two or more longer bristles. Third vein with three or four 

 bristles at its base. Hypopygium black, inner forceps long, curving 

 inwardly and tapering to a fine point, outer forceps shorter, about 

 three-fourths the length of the inner ones, slender and tapering as 

 the others. 



Redescribed from several specimens of both sexes: the type is 

 from White Mountains, N. H. (Morrisson) ; one from Crawford's 

 and three from Franconia, N. H. (Mrs. Slosson) ; one "\^niite Moun- 

 tains, New Hampshire, and one Spot Pond, Massachusetts (Town- 

 send) ; one Seattle, Washington (Aldrich), There is also a series 

 in the gypsy moth laboratory, Melrose Highlands, Massachusetts. 

 Johnson lists it from New Jersey. The only rearing record is re- 

 ported by Tothill, the host being Amphidasia cognataria Gueneo, at 

 Coldstream, British Columbia. 



r?//?e.— Male, Cat. No. 3624, U.S.N.M. 



ZENILLIA OCHRACEA Van der Wulp. 



Exorista ochracea Van der Wulp, Biologia Centrali-Americ:ina, Diptera, 



vol. 2, 1890, p. 63. 

 Chrysomasicera horealis Townsend, Joiirn. New York Ent. Soc, vol. 23, 



1915, p. 230. 



Thorax and abdomen golden pollinose, the latter with the apical 

 margins of last three segments polished black; mid tibiae with one 

 bristle on the outer front side near the middle. 



Front of male 0.280 and in the female 0.326 of the head width; 

 front mostly golden pollinose, the face less so, silvery in some speci- 

 mens; facial ridges bristly on the lowest third; bucca one-fifth the 

 eye height; face wider than front; antennae nearly as long as face, 

 third joint in male five times the second and in the female slightly 

 less; arista gradually tapering from base to apex, the penultimate 

 joint short. Thorax yellowish pollinose marked with four fine black 

 vittae; four dorsocentral macrochaetae ; scutellum yellowish bearing 

 two or three pairs of long bristles besides the very short fine pair 

 of apical ones which are cruciate and turned upward. Sternopleura 

 with three bristles. Abdomen with weak discal bristles on the second 

 segment and stronger ones on the third, the fourth segment has a 

 marginal and submarginal row of macrochaetae, first segment black, 

 remaining ones yellow pollinose except on apical fourth which is 

 opaque black, sharply contrasting. Legs black; mid tibiae bearing 

 but one bristle on the front side near the middle: hind tiliiae weakly 



