SYSTEMATIC ACCOUNT. 57 



tinct; in general appearance and in the shape of the head two types certainly 

 exist, but the wing characters that have been used as the only means of 

 separating them are evidently not valid. 



The type species of Stegana is S. coleoptrata Scopoli, a European species, 

 designated as type by Westwood (1840, Intr., 2, 153). The type of Phortica 

 is the European Drosophila variegata Fallen, which was the only species 

 included in the genus originally. 



The group here considered as forming the genus Stegana includes nine 

 described Palaearctic species (Europe), five Neotropical (St. Vincent, Peru, 

 Bolivia; I have seen the genus from Mexico and Central America), and 

 twelve Oriental (Ceylon to Formosa and New Guinea). I have seen an 

 Ethiopian specimen, collected by the American Museum Kongo Expedition. 

 Our knowledge of the Nearctic species is in a very unsatisfactory condition, 

 and I am not sure that the treatment given below will stand after more 

 study. Six Nearctic species are recorded, but I am unable to recognize 

 more than two in the large number of specimens that I have seen. 



Stegana coleoptrata Scopoli. 1763. Ent. CarnioL, 338 (Musca). 



S. hypoleuca Meigen. 1830. Syst. Beschr., 6 (cJ'). 



Phortica vittata Coquillett. 1901. Proc. U. S. Nat. Mus., 23. 



Loew recognized S. curvipennis Fallen (as S. nigra Meigen) from North 

 America; I have seen a specimen so labeled in the Loew collection, from 

 Pennsylvania. I am unable to see any good reason for separating this 

 specimen from S. coleoptrata, though it appears from the accounts of Schiner 

 and of Oldenberg that in Europe the two species are quite distinct. The 

 European species seem to have been little understood in Loew's time. It is 

 now customary to identify the darker specimens as *S. coleoptrata, the lighter 

 ones as P. vittata; but intermediates occur; and I can find no other char- 

 acter that will separate the supposed two species. 



Specimens examined: Mount Desert, Maine (C. W. Johnson); Mount 

 Washington (Mrs. Slosson), Franconia (Mrs. Slosson), Bretton Woods 

 (C. W. Johnson), New Hampshire; Brattleboro, Vermont (C. W. Johnson); 

 Brookline, Fall River, Massachusetts (C. W. Johnson); Buttonwoods, 

 Rhode Island (C. W. Johnson) ; Danbury, Winnipauk, Middletown, Roway- 

 ton, Darien, Connecticut (C. W. Johnson); South Wales (M. C. Van- 

 Duzee), Ithaca (S. W. Frost), New York; Delaware Water Gap (type of 

 vittata), Clemonton (C. W. Johnson), Avalon (C. W. Johnson), New 

 Jersey; Polk County, Wisconsin (C. F. Baker); Great Falls, Virginia (N. 

 Banks); Daytona, Florida (C. W. Johnson). 



Recorded in Europe from England to Hungary. 



Stegana htuneralis Loew. 1862. Centuria, 2, 93 (Amiota). 



A. leucostoma Loew. 1862. Centuria, 2, 94. 



(?) Drosophila alboguttata Wahlberg. 1838. K. Vet. Ak. Hand., 22. 



The types of Loew's two species are quite distinct in color. S. humeralis 

 is somewhat shining black in general color, while *S. leucostoma is brown. 

 I can find no other differences, and an extensive series of more recent 

 material shows graded color variations completely connecting these two 

 extremes. Wahlberg's species was recognized from the Nearctic by Loew. 

 Two specimens so labeled in the Loew collection (from New Hampshire 

 and New York, respectively), appear to me to belong to the same species 

 as the type of *S. humeralis. I am, however, unwilling to substitute Wahl- 

 berg's name without more study. 



Specimens examined: Waubamic, Parry Sound, Ontario (Aldrich coll.); 

 Franconia (Mrs. Slosson), Center Harbor (H. G. Dyar), Glen House (C. W. 



