SYSTEMATIC ACCOUNT. 101 



Java (?); 1895, Fall River, Massachusetts; 1898, Philadelphia, Pennsyl- 

 vania; about 1900, Hawaii; 1904, Nashville, Tennessee; 1909, Bermuda. 

 The mating habits of D. repleta are described on page 7; the sperm- 

 atheca is figured on page 37; its mutations are discussed on page 14. 

 This species will breed on fruit, and is attracted to human excrement (see 

 Sturtevant, 1918). 



Drosophila hydei, new species. 



9 , cf. No constant differences from D. repleta and D. mulleri except as follows: 

 First coxae pale brown below. No lateral gray areas on abdominal segments. 



Type and gonotypes: from stock collected at Lakeland, Florida (C. W. 

 Metz). As in the case of D. immigrans, the gonotypes are not descended 

 from the type, but the whole type series is known to be descended from 

 one individual. 



Other specimens examined: Boston (C. W. Johnson), Woods Hole, 

 Massachusetts; Providence, Rhode Island (C. W. Johnson); Riverton, 

 New Jersey (C. W. Johnson) ; Frankford, Pennsylvania (C. W. Johnson) ; 

 Bloomington (F. Payne), North Manchester (R. R. Hyde), Indiana; Coal 

 Creek, Tennessee (W. S. Adkins); Flat River (T. Pergande), St. Louis 

 (A. Busck), Missouri; St. Augustine (C. W. Johnson), Daytona (C. W. 

 Johnson), Jacksonville (Mrs. Slosson), Miami, Florida; Kushla, Alabama; 

 New Orleans, Louisiana (C. W. Metz); Willis, Texas (U. S. Nat. Mus. 

 coll.); Berkeley (E. B. Babcock), Claremont (C. F. Baker), Newport (C. 

 W. Metz), Spreckels (C. F. Stahl), California; Calabacillas, Chihuahua 

 (S. McGibbon); Cuernavaca (C. C. Deam), Amatlan (F. Knab), State of 

 Vera Cruz; Punta Gorda, British Honduras (J. D. Norton); Alajuelo, 

 Panama (A. Busck); Nassau, Bahamas (coll. C. W. Johnson); Havana, 

 Guareiras, Cuba; Cayey, Porto Rico (Lutz and Mutchler). 



The species is named for Dr. R. R. Hyde, who first discovered that it is 

 distinct from D. repleta in the color of the abdomen and that it will not 

 cross with that species. I have verified these points and found the addi- 

 tional character of coxal color. As pointed out in the discussion of D. 

 repleta, there is also a difference in eye-color and in average size that can 

 be seen in life. 



The mating habits of this species are discussed on page 6, and a muta- 

 tion that Dr. Hyde has studied is listed on page 14. The eggs have 

 four anterior filaments. The species will breed on fruit. 



Drosophila hydei is evidently an introduced species in the United States, 

 since it would have been mistaken for D. repleta, and we have already seen 

 that that species was not known to the earlier collectors. The following 

 dates are the earliest known to me for the species: 1891, St. Augustine, 

 Florida; 1897, Frankford, Pennsylvania; 1900, State of Vera Cruz, Mexico; 

 1903, Willis, Texas; 1904, St. Louis, Missouri, and Providence, Rhode 

 Island; 1905, Nassau, Bahamas. 



Drosophila mulleri, new species. 



D. repleta, variety a. Metz. 1916. Amer. Nat., 50, 595. 



cf , 9 . No constant differences from D. repleta and D. hydei except as follows: 

 First coxa pale brown below. Lateral gray areas present on abdominal segments as in 



D. repleta, often a little larger than in that species. 



Type (d^) and four paratypes: Houston, Texas, 1915 (H. J. Muller). 



Other specimens examined: Miami, Key Largo, Florida (F. Knab); 

 Herradura (C. W. Metz), Havana, Guareiras, Aguada Pasajeros, Guan- 

 tanamo (C. T. Ramsden), Cuba; Kingston, Jamaica (M. Grabham); 

 Tegucigalpa, Honduras (F. J. Dyer). 



