SARCOPHAGA AND ALLIES 109 



den by the folding together of the sides of the fourth 

 segment in the only female. 



Length 4-71/2 mm. 



Ten males, one female. One male, Trenton, N. 

 J., June 26, 1910 (Harbeck) ; two males Opelousas, 

 La., April and May, 1897 (Hough collection) ; one 

 Uvalde, Texas, July 16, 1914, adult on fresh cow- 

 dung (Bishopp, No. 3489) ; one without locality label 

 (Bishopp 3325) ; Cincinnati, O. (Hine) ; Manayunk 

 and Castle Rock, Pa. (Harbeck) ; LaFayette, Ind. 

 (J. M. A.) ; one male and one female. Key West, 

 Fla., Mav 1-3, 1915 (Sturtevant) . 



Holotvpe.— Male, No. 20508, U. S. N. M., from 

 Uvalde, Tex. 



Alotype.— Female, No. 20508, U. S. N. M., 

 from Key West, Fla. 



No. 44. Sarcophaga melampyga var. alata n. var. 

 Differs from malampyga only in the structure of 

 the penis. The distal segment on the posterior side 

 has a median rather double keel, which divides and di- 

 verges at each end; the terminal tube is larger in di- 

 ameter ; and on the front side beginning near the mid- 

 dle is a wide turned-back fold or thin, pale, corrugated 

 or ruffle-like expansion, which turns back and nar- 

 rows laterally. This last is represented in melampyga 

 by a rather narrow flap as shown in the figure. In 

 melampyga the body of the distal segment is full and 

 round on the sides, w^hile in the variety it is hollow. 

 The difference would easily be specific if accompanied 

 by any other characters, but in their absence this form 

 may stand as a variety. 



Twenty-seven specimens, both sexes; eight of 

 both sexes from Miami, Fla. (C. H. T. Townsend 

 and Mrs. Townsend) ; six from Key West, Fla., Feb. 

 1-6, 1869 (C. V. Riley) ; one male, one female, on 

 same pin, Biscayne Bay, Fla. (Mrs. Slosson) ; one 

 male, Miami, Fla., American Museum Nat. Hist.; 

 one male, Witfeld, Fla., July, 1882 (C. V. Riley) ; 

 ten both sexes, Havana, Cuba, in the writer's collec- 



