62 THE NORTH AMERICAN SPECIES OF DROSOPHILA. 
Chester (C. W. Johnson), Monument Beach, Woods Hole, Fall River, New 
Bedford, Massachusetts; Kingston, Rhode Island (C. W. Johnson); Hart- 
ford (Mrs. Slosson), New Haven (C. W. Johnson), Rowayton (C. W. John- 
son), Connecticut; Ithaca (S. W. Frost), Cold Spring Harbor, New York, 
New York; Fort Lee, Paterson, New Brunswick, New Jersey; Plummer’s 
Island, Maryland (R. C. Shannon); District of Columbia (type material) ; 
Dead Run (R. C. Shannon), West Falls Church (N. Banks), Virginia; 
Black Mountains, North Carolina (W. Beutenmuller); Greenville, South 
Carolina; Bloomington, Indiana (F. Payne); Algonquin (D. W. Coquillett), 
Chicago (W. M. Wheeler), Illinois; near St. Louis, Missouri; Kushla, 
Alabama; Palestine, Austin (W. M. Wheeler), Texas. Recorded from 
Pennsylvania (Kahl); Michigan, Kansas (Aldrich); Georgia, Louisiana 
(Melander). 
Chymomyza procnemis Williston. 1896. Trans. Ent. Soc. London, 412 (as Drosophila). 
Specimens examined: Franconia, New Hampshire (Mrs. Slosson); New 
York, New York; Algonquin, Illinois (D. W. Coquillett); Dead Run, 
Virginia (R. C. Shannon); Biscayne Bay (Mrs. Slosson), Atlantic Beach 
(Mrs. Slosson), Tampa (C. W. Metz), Lakeland (C. W. Metz), Florida; 
Kushla, Mobile, Alabama; Herradura (C. W. Metz), Aguada Pasajeros, 
Cuba; Montserrat, Trinidad, West Indies (A. Busck); Panama, Republic 
of Panama (A. Busck). Described from St. Vincent by Williston; recorded 
from Pennsylvania, Kansas, and Brazil by Kahl. 
Chymomyza caudatula Oldenberg. 1914. Arch. Naturgesch. 80, A, 2, 14. 
Specimens examined: Pullman, Mount Constitution, Washington (A. L. 
Melander). Described from Hungary. 
Chymomyza aldrichii Sturtevant. 1916. Ann. Ent. Soc. Am., 9, 325. 
Specimens examined: Potlatch, Yale, Idaho (J. M. Aldrich). 
Mycodrosophila Oldenberg. 1914. Arch. Naturgesch., 80, A, 2, 4. 
This genus was based on the species Amiota (Phortica) pecilogastra 
Loew (= Drosophila johni Pokorny), from southeastern Europe. The 
group was recognized by Lamb (1912, Trans. Linn. Soc. London, 16) and. 
suggested as a subgenus of Drosophila, though no name was given to it. 
Lamb described three species, from the Seychelles, that he placed in this 
group: Drosophila fracticosta, D. nigerrima, and D. nigrobrunnea. He also 
pointed out that D. gratiosa de Meijere, from Java, belongs in the same 
group. I have referred all four of these species to Mycodrosophila (1918, 
Bull. Amer. Mus. Nat. Hist., 38, 442). <A little earlier (1918, Journ. N. Y. 
Ent. Soc., 26, 38) I had referred Drosophila dimidiata Loew (Eastern States) 
and D. projectans Sturtevant and D. thoracis Williston (both from the West 
Indies), to the same genus. To this list we may now add Drosophila pleur- 
alis Williston, also from the West Indies. We have, then, nine species; 
one Palearctic, one Nearctic, three Neotropical, three Ethiopian, one 
Oriental. 
The genus is characterized as follows: middle (lower reclinate) orbital minute; post- 
verticals large, convergent; thoracic bristles as in Drosophila, except that the anterior 
dorsocentral pair is missing or extremely minute, and prescutellars are never present; 
preapical bristles on first and second tibie indistinct or missing; eyes bare or nearly so; 
mesonotum ‘‘ humped up ”’; scutellum rounded, not so flat as in Drosophila; distal costal 
incision (just before tip of first vein) deep, costa somewhat swollen just basal to the incision; 
a single bristle before the distal costal break, instead of the usual two. The nine species 
are all dark and shining above, pale yellow on pleurz, legs, and face; abdomen shining 
dark brown or black with pale yellow markings. 
