SYSTEMATIC ACCOUNT. 61 



Leucophenga oraatipennis Loew. 1865. Berlin, ent. Zeit., 9, 183 (as Drosophila). 



Specimens examined: type material (Gundlach), Bartle (C. W. Metz), 

 Cuba. The specimen from Bartle has more yellow on the abdomen than 

 the type, but apparently represents the same species. 



Chjmiomyza Czerny. 1903. Zeit. Hymenopt. Dipt., 3, 3, 199. 



Arista plumose; lower reclinate orbital large, placed below proclinate orbital; ocellara 

 present; post verticals small; vibrissse present, other oral bristles large; eyes bare or nearly 

 so; carina confined to upper part of face; a few enlarged ommatidia in lower front part of 

 eye; two dorsocentrals; two scutellar pairs, posterior ones crossed; a small propleural 

 sometimes present; preapicals on all tibia;; first femora of males with numerous strong 

 bristles below; costa reaches fourth vein; anal cell and vein present; hypopygium promi- 

 nent; slender species. 



The species are to be found around bleeding trees, on windows, or at 

 fruit. Dr. Metz and I have bred C procnemis Williston from banana, 

 and C. amoena Loew from apple and banana. Shannon has bred the latter 

 from walnut and butternut husks, and Banks has bred it from acorns. The 

 members of the genus have a characteristic habit of waving their wings 

 constantly, after the fashion of species of Sepsis or Euxesta. 



The type species is Drosophila fuscimana Zetterstedt, from Europe. The 

 following species may be recognized: 



Palsearctic: Chymomyza albopundata Becker; C. caudalula Oldenberg; C. coslata Zetter- 

 stedt; C. distinda'EggeT; C. fuscimana Zetterstedt. 



Etliiopian: C. bicolor Lamb. 



Nearctic: C. aldrichii Sturtevant; C. amcena Loew; C. caudalula Oldenberg; C. procnemis 

 WiUiston. 



Neotropical: C. procnemis WilUston. 



Deducting for double entry of caudalula and procnemis, the total is nine 

 species. 



Oldenberg (1914, Arch. Naturgesch., 80, A, 2, 14) has discussed the 

 Palsearctic species. He has studied the male genitalia, which are evidently 

 of importance as taxonomic characters in this group. I have found their 

 study difficult to carry out, however, and have used the character only 

 enough to identify C caudalula from the Pacific coast, and to determine 

 that C. procnemis (specimens from Lakeland, Florida) is distinct from 

 C. fuscimana and C. distincta, which it greatly resembles. I am certain 

 that a study of these organs would show that what passes as C. procnemis 

 is really a mixture of several species. 



There are at least two Neotropical species of the genus Chymomyza 

 (Haiti, British Guiana) with laterally produced eyes, suggestive of Zygo- 

 thrica. I have not described them because it seems better to wait for a 

 study of the male genitalia before attempting to determine specific limits 

 in the section of the genus to which they belong. 



The described North American species may be separated by the following 

 key: 



1. Wings much spotted; front legs yellow amoena 



Wings clear, or blackish along anterior margin, or with a white tip; front femora, 



tibiae, and basal tarsal joints blackish 2 



2. Front yellow or reddish yellow procnemis 



Front dark opaque brown 3 



3. Wings clear; face whitish caudalula 



Costal cell brown; face brown aldrichii 



Chymomyza amoena Loew. 1862. Berl. ent. Zeit., 6, 230 (as Drosophila). 



Specimens examined: Hanover, New Hampshire (C. W. Johnson); 

 Brattleboro, Vermont (C. W. Johnson); Worcester (C. W. Johnson), 



