E. T. CRESSON, JR. 37 



Type.—d': IManchester, Vermont, June 8, 1910, (C. W. John- 

 son), [B. S. X. H.]. Paratypes. — 1 9 ; topotypical. 1 d^ ; New 

 Jersey, [A. X. S. P.]. 1 9 ; Niagara Falls, New York, June 13, 

 1909, (AI. C. VanDuzee), [VanDuzeej. 



Tribe Sciomyzini 



This is somewhat of a heterogeneous group, possessing most 

 of the characters mentioned under the subfamily. It is men 

 tioned here simply in contradistinction to the other tribe. 

 The antennae are short; third joint broad and rounded apically, 

 with a black arista. The face is generally flat in profile, or rarely 

 concaved with prominent epistoma. 



SCIOMYZA Fallen 



1820. Fallen, Dipt. Suec, Sciom., 11. 



1902. Bischofia Hendel, Ver. Zool.-Bot. Ges. Wien, Hi, 52. 



The above synonymy is necessary on account of the selection 

 of Sciomyza simplex Fallen (1820), by Westwood in 1840, as the 

 type-species of Sciomyza, and l)y Hendel, in 1902, as the type- 

 species of his new genus Bischojia. The Sciomyza of authors is 

 now known as Melina Desvoidy. 



In the present genus we have the general characteristics of 

 Melina with the following differences: Fore and middle tibiae 

 with two preapicals; arista long plumose; epistoma strongly 

 IDrojecting. The species are more robust and larger than those 

 of Melitm. The wings of the known species are immaculate, 

 at most with clouding along the costa and cross-veins. The 

 known species show more or less sexual dimorphism in color and 

 structure, so care should be exercised in describing new ones. 

 Our species are known only in the female sex, and may be sep- 

 arated as follows: 



Alostly black; arista sparingly plumose varia 



Tawny ; arista densely black plumose aristalis 



Sciomyza varia Coquillett 



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



9 . Black, shining. Head including antennae, pleura, halteres. sometimes 

 scutellum and lateral margins of abdomen, all coxae, bases of hind femora, 

 middle legs except apices of femora, paler. Wings infuscated along costa 

 and veins. Palpi black. Length. — 6 mm. 



TR.iNS. AM. ENT. .SOC, XLVI. 



