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 

 (Mela'nder). 



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 Pennsylvanfa, Kansas, and Brazil by Kahl. 



Chjrmomyza caudatxila 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) poecilogastra 

 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 Palaearctic, 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 tibiae 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 pleurae, legs, and face; abdomen shining 

 dark brown or black with pule yellow markings. 



