38 A REVISION OF THE NEARCTIC SCIOMYZIDAE 



Originally described from Rigaud, Quebec, Canada, and type 

 in collection of C. W. Johnson. Before me is a female from 

 Ottawa, Canada, July 19, [C. W. Johnson]. 



Sciomyza aristalis Coquillett (PL II, fig. 25.) 



1901. Dryomyza aristalis Coquillett, Proc. U. S. Nat. Mus., xxiii, 617. 

 1904. Bischofia aristalis Coquillett, Can. Ent., xxxvi, 12. 



9. Tawny to yellow; shining to polished. Frons anteriorly, sides of 

 face, cheeks, antennae, halteres, fore coxae, legs except fore tarsi, paler. 

 Arista and the dense plumosity, face median ly below, apices of palpi and 

 fore tarsi, black. Wings yellowish, with cross- veins and apices clouded. 

 Scutellum broad, slightly emarginated apically. Length. — 7 mm. 



Originally described from Ottawa, Canada, [U. S. N. M. no. 

 5505]. 

 Specimens examined. — 4 9 . 



Canada: Kearney, Ontario, July 15, (M. C. VanDuzee), [VanDuzee]. 

 New Hampshire: Bretton Woods, June 28, (C. W. Johnson), [B. S. N. H.]. 

 New York: Niagara Falls, July 7, [VanDuzee]. 

 Michigan: Mackinac Island, July 5, [VanDuzee]. 



DICHROCHIRA Hendel 



1902. Hendel, Abh. Zool.-Bot. Ges. Wien, ii, 57. 



Seemingly a poorly defined genus structurally, but well marked 

 in color characters. The known species are slender, shining, 

 with shining frons; arista black, loosely plumose; wings immacu- 

 late, at most with costa and veins clouded; pteropleura setulose. 

 IVIostly black, especially the mesonotum, abdomen and fore tibiae. 

 The species should not be confused with those of Hemitelopteryx. 



Genotype. — Sciomyza 7iigrimana IVIeigen (1830), by original des- 

 ignation. 



Key to the Species 



1. Palpi and third antennal joint entirely black albicalceata 



Palpi and third joint mostly yellow 2 



2. Pleura and metanotum black 3 



Pleura and metanotum tawny apicata 



3. Apices of fore tarsi white; only one frontal bristle pleuralis 



Tarsi entirely black; two frontal bristles glabricula 



Dichrochira apicata Loew 



1876. Sciomyza apicata Loew, Zeit. fur Ges. Naturw., Berlin, xlviii, 33. 



This species, as I have recognized it, may be distinguished by the pale third 

 antennal joint, which is, however, margined with black, the i)ale palpi, 

 which arc also margined, and the pale pleura, including the metanotum. The 



