ART 18 DIPTERA OR TWO-WINGED FLIES — ALDRICH 19 



of macellaria (not of Paralucilia comicma Fabricius, as suggested 

 in my Catalogue, 1905, p. 516). 



Wiedemann's allusion to this form by name occurs in a note fol- 

 lowing his description of macellaria Fabricius. Discussing the 

 variations of the species, h6 says that those specimens having the 

 white dorsal abdominal pollinose spots or interrupted cross-bands in 

 the collection of Count Hoffmansegg were labelled Blusca laniaria, 

 adding that they are not otherwise materially different from macel- 

 laria. Although in his description, based on the Fabrician type or 

 types and additional material of his own, he had described these 

 fasciae as if i\\Qj were typical of maceUarla, his note seems to make 

 it clear that laniaria differs from macellaria in possessing them. 



Genus CHRYSOMYIA Robineau-Desvoidy 



Chrysomyia Robineau-Desvoidy, Myiodaries, 1830, p. 444. — Townsend, 

 Journ. Wash. Acad. Sci., vol. 5, 101.5, p. 646. 



CHRYSOMYIA DESVOIDYI Hough 



Chrysomyia desvoidyi Hough, Kans. Univ. Quart., vol. 9, 1900, p. 203. 



This was described from Brazilian specimens. As far as known 

 it is the only American species with the hind calypter hairy, a char- 

 acter fortunately mentioned by Hough, It must be admitted how- 

 ever that the species is somewhat intermediate in this regard, since a 

 considerable area of the lateral apical portion is bare. 



Eyes of male almost contiguous for a considerable distance, sepa- 

 rated only by the width of the front ocellars. The female has the 

 front slightly narrowed just above the antennae, where it is about 

 one-fourth as wide as the head (0.26 in each of tv/o measured by 

 micrometer). Halfway between the posterior ocelli and the eye, on 

 the vertex of the female, there is one distinct bristle curved back- 

 ward and laterally. The ocellar bristles in the female are close to 

 the anterior ocellars and are directed straight to the side, opposite 

 to each other. In the male, however, the ocellars are parallel and 

 proclinate. Thorax in both sexes with much less distinct stripes 

 than in the genera Paralucilia and Cochlioinyia, In all the speci- 

 mens seen the body color is deep blue-green. The hind calypter is 

 dark brown, with white rim only in two females. The second and 

 third abdominal segments have each a black band on the hind mar- 

 gin. Additional characters are given in the original description. 



Six males and ten females ; Quebrada Secca, Venezuela ; Valera, 

 Venezuela (Dr, C, Uribe) ; Cano Saddle, Canal Zone, Panama 

 (Shannon) ; Erwin Island, Canal Zone, Panama (Shannon) ; Trini- 

 dad Rio, Panama (Busck) ; Las Cascadas, Canal Zone, Panama 

 (A, H, Jennings) ; San Carlos. Costa Rica (Schild and Burgdorf ) ; 

 Cordoba, Mexico (Knab). 



