SYSTEMATIC ACCOUNT. 



105 



minute. Only one prominent oral bristle. Carina narrow, confined to upper part of face; 

 face blackish brown. Cheeks brown; their greatest width one-sixth greatest diameter of 

 eyes. Eyes with very fine, sparse pile. 



Acrostichal hairs in four rows; no prescutellars. Mesonotum and scutellum velvety 

 black. Notopleural suture yellow; pleurge velvety black down to a line from base of first 

 coxa to haltere, pale yellow below this fine. Legs pale yellow. Apical and preapical 

 bristles on first and second tibiae, preapicals on third. 



Abdomen yellow, each segment with a posterior opaque black band that is wider at the 

 sides. 



Wings brownish tinged; veins dark brown, except at base, which is pale yellow. Costal 

 index about 1.5; fourth-vein index about 1.8; 5x index about 1.4; 4c index about 1.3. 



Length of body 1.5 mm.; of wing 1.5 mm. 



Fig. 49. — Drosophila superba. Wing of type specimen. 



Specimens examined : St. Vincent, West Indies (Williston type material) ; 

 Mayaguez, Porto Rico (F. E. Lutz) ; Port Antonio, Porus, Jamaica (C. W. 

 Metz). Williston (1897, Kans. Univ. Quart., 6) has recorded the species 

 from Brazil. 



This species suggests Mycodrosophila, but can not go in that genus because 

 it has two well-developed dorsocentral pairs, and because the thorax has 

 not the shape characteristic of Mycodrosophila. It also resembles the group 

 typified by D. dubia, but has large postverticals and is dull in color. The 

 four acrostichal rows are aberrant, and suggest Scaptomyza, but this form 

 resembles that genus in no other respect. 



Species of Drosophila recorded from North America that are not listed above. 



D. adusta Loew, to Scaptomyza. 



D. alhipes Walker, not recognizable from the description. 



D. amoena Loew, to Chymomyza. 



D. ampelophila Loew, synonym of D. melanogaster Meigen. 



D. annulata WiUiston, new name is D. annularis Sturtevant. 



D. apicata Thomson, to Scaptomyza; is a synonym of D. terminalis Loew. 



D. bellula Williston, new name is D. pulchella Sturtevant. 



D. bimaculata Loew, to Leucophenga. 



D. brevis Walker, not recognizable from the description. 



D. cellaris Linnaeus, erroneous name for D. funebris Fabricius. 



D. colorata Walker, not recognized. Suggests D. sulcata Sturtevant, and was so identified 



by Coquillett. 

 D. confusa Staeger, does not occur in North America. The material that has been so 



recorded is mostly D. affinis Sturtevant. 

 D. decemguttata Walker, probably is a Diastala. 

 D. dimidiata Loew, to Mycodrosophila. 



