60 THE NORTH AMERICAN SPECIES OF DROSOPHILA. 



Deducting for the double entry of maculosa, the total is 45 species. 



The genus may be divided into two groups on the basis of the palpi. 

 In one group they are slender and clavate, in the other they are broad and 

 flat. Each group is described from four of the main geographical regions. 

 The group with flat palpi is not to be recognized from the descriptions of 

 Palsearctic species, nor that with clavate palpi among those described from 

 the Oriental region. I have, however, seen specimens from Australia and 

 from Java that have clavate palpi. 



The five North American forms may be separated as follows: 



1. Palpi clavate, yellow 2 



Palpi broad and flat 3 



2. Tip of first vfein dark, wings otherwise clear frontalis 



Dark spots at tips of first and second veins varia 



3. Palpi yellow; both cross-veins and tips of first and second (sometimes also third) 



veins clouded maculosa 



Palpi black 4 



4. Large black spots at tips of first and second veins; posterior cross-vein and tip of 



third clear bimaculata 



Spot on second vein also extends along third to wing tip; that at tip of first reaches 



to base of anal cell; posterior cross- vein surrounded by a black spot . . obscuripennis 



For a detailed discussion of certain species of the genus, and a more 

 extensive key, see Kahl's paper (1917, Ann. Carnegie Mus., 11, 364). 



Leucophenga varia Walker. 1849. List. Ins. 4 (as Drosophila). 



Drosophila quadrimaculata Walker. 1856. Dipt. Saund., 4. 



Specimens examined: Woods Hole, Massachusetts; Riverton, New 

 Jersey (C. W. Johnson); Philadelphia, Pennsylvania (C. W. Johnson); 

 Plummer's Island, Maryland (R. C. Shannon); Brookland, District of 

 Columbia (R. C. Shannon); Bloomington, Indiana (F. Payne); Illinois 

 River (Melander collection); La Follette, Coal Creek, Tennessee (W. S. 

 Adkins); valley of Black Mountains, North Carolina (W. Beutenmuller) ; 

 southern Georgia (Morrison); Jacksonville, Florida (Amer. Mus. Nat. 

 Hist, coll.); Kushla, Alabama; Opelousas, Louisiana (Melander collection). 

 Also recorded from New York, West Virginia, and Kansas by Kahl. 



Leucophenga maculosa Coquillett. 1895. Proc. Acad. Nat. Sci. Phila.,47 (as Drosophila). 

 Specimens examined: Flatbush (J. L. Zabriskie), New York, New York; 

 Plummer's Island, Maryland (R. C. Shannon); Rock Creek, District of 

 Columbia (R. C. Shannon); Bloomington, Indiana (F. Payne), North 

 Carolina (U. S. Nat. Mus. coll.); Archer (type material), Biscayne Bay 

 (Mrs. Slosson), Florida; Kushla, Alabama; Victoria, Texas (E. A. 

 Schwarz); Herradura, Cristo, Cuba (C. W. Metz); Sanchez, Haiti (F. E. 

 Watson); Lima, Peru (Parrish). Recorded from Pennsylvania, Illinois, 

 and Kansas by Kahl. I suspect that L. hasemani Kahl, from Brazil, is a 

 synonym. My specimens of maculosa from Alabama and Cuba have the 

 apex of the third vein infuscated as in hasemani, though they agree with 

 Kahl's description of maculosa in the position of the orbitals. These two 

 characters were the basis of the separation into two species made by Kahl. 



Leucophenga frontalis Williston. 1896. Trans. Ent. Soc. Lond. (as Drosophila). 



Specimens examined : Mayaguez, Porto Rico (F. E. Lutz) ; Guantanamo 

 (F. E. Lutz), Havana, near Pinar del Rio (F. E. Lutz), Cuba; La Ceiba, 

 Honduras (F. J. Dyer). Described from St. Vincent, West Indies. 



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



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

 Cristo (C. W. Metz), Cuba. 



