AKT. 17. NORTH AMERICAN PHOROCERA ALDRICH AND WEBBER. 17 



ciliate with one longer bristle. Front pulvilli twice the lengtli of 

 those of the hind tarsi. 



Redescribed from eight specimens: the type of Chrysomasicera 

 horealis^ which is a male taken at " Top of Las Vegas Range, New 

 Mexico, June 28" (Cockerell) ; one female, allotype of the same, 

 Las Vegas Hot Springs, New Mexico, August 9 (Barber) ; one 

 female, Mexico City (Roberto Miiller) ; five females. Hell Canyon, 

 Manzano National Forest, New Mexico, September 19, 1916, on foli- 

 age of oak (Townsend). The last are considerably smaller than the 

 rest. The allotype bears Coquillett's identification as ochracea Van 

 der Wulp, which in this case seems considerably more certain than 

 in most of Wulp's species. Cockerell noted " In life brilliant golden 

 shot with green," and Wulp records a similar observation about the 

 green tinge by H. H. Smith, who collected his material. 



The type of ochracea is in the British Museum; that of horealis 

 is Cat. No. 19613, U.S.N.M. 



ZENILLIA MARGINATA, new epecies. 



? Clirysoexorista viridis angusUfronH Townsend, Bull. Amer. Mus. Nat. 

 Hist, vol. 35, 1916, p. 21. 



Thorax and abdomen wholly golden pollinose; with three sterno- 

 pleural bristles; fourth segment of the abdomen with two rows of 

 macrochaetae; apices of the intermediate segments black. 



Front of female 0.28 of the head width; front golden pollinose 

 the face slightly less so, sides of the former sparsely haired; facial 

 ridges bristly on the lowest fifth ; bucca grayish pruinose with yellow- 

 ish tinge, about one-sixth the eye height; palpi yellow; antennae 

 nearly as long as face, the third joint three times the length of second, 

 arista thickened on the basal third, penultimate joint short. Thorax 

 black, yellowish pollinose bearing four black vittae; three or four 

 dorsocentral macrochaetae present; scutellum yellowish with three 

 long and one shorter pair of apical bristles. Sternopleura with three 

 bristles. First segment of the abdomen black, intermediate segments 

 golden pollinose, their narrow apical margins polished black ; fourth 

 segment wholly golden pollinose; venter black, gray pollinose. Dis- 

 eal and marginal macrochaetae present on all segments but the first, 

 which has only the marginals. Legs black; mid tibiae bearing one 

 stout bristle on the outside near the middle; hind tibiae evenly ciliate 

 with one longer bristle. Anterior portion of the wings brownish; 

 third vein with two bristles at its base. 



Length 7 mm. 



Described from one female collected at Boulder, Colorado, October 

 13, 1917 (Cockerell). Another female probably belonging to the 

 species is from Cornelia, Georgia, under Codling Moth band {Car- 



