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 
Palearctic 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: 
t7UPalpi clavate, yellow: Vins cc eee oe oe as Re ete sn an A 2 
Palpi broad and fat os) a8. Fo las sate aed yee ee ee ens he ce 3 
2. Tip of first vein dark, wings otherwise clear.....................0000ce00e. frontalis 
Dark spots ati tips of first and’ second veins... 55°) 6 .4!.. sn i. oe ee ee varia 
3. Palpi yellow; both cross-veins and tips of first and second (sometimes also third) 
WEINA CLOVE eae ieee nee Zh eee ee Ae Bae ete ohne each Renae a maculosa 
Palpiblack io, sek wk mines aie alike eke Pisa doe eaten sala a one iene 6 tae a 
4. Large black spots at tips of first and second veins; posterior cross-vein and tip of 
Chind glean tat again ae Sine ahah Kerio wane ee Near git niles eat ee 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 (EH. 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. 
