Vol. XXviii] ENTOMOLOGICAL NEWS. 325 



stout, but not as long as in the male. Apex of the ovipositor with the 

 upcurved spines characteristic of the females of this genus. Hind 

 tibiae lack the fine setae of the inner flexor surface. Last section of 

 M 1+2 only about a fifth or a fourth shorter than the penultimate. 

 The size is quite variable, ranging from 4 to 7 mm. in length. 



Type (male) from Melrose Highlands, Massachusetts, in 

 my collection. Paratypes from Melrose Highlands, Massachu- 

 setts, and Ithaca, New York, Melrose Highlands Laboratory 

 and Cornell University collections. April and May. 



Some specimens in Dr. J. M. Aldrich's collection from La- 

 fayette, Indiana, differ only in having a much larger "pra," 

 in having numerous setulae among the acrostichals, and more 

 abundant and larger setulae upon thorax and abdomen. 

 This species differs from H. maculata St., in the chaetotaxy 

 tif the legs and in the structure of the hypopygium of the 

 male; from H. anilincata it differs in having narrower genae, 

 in the form of the fifth sternite and in size. H. maculata has 

 not yet been taken in New York ; my previous reference to 

 it should be applied to H . palndis. 



PROSALPIA. 



This genus resembles Hammomyia and Hylephila in hav- 

 ing an elongate anal vein, a pilose lower surface of the scutel- 

 lum, and narrow front in both sexes, but differs from the 

 former in having a bare or pubescent arista and from both 

 in not having the head inflated. The two species recorded 

 from North America in Aldrich's catalogue may be distin- 

 guished as follows. 



a. Thorax and abdomen shining black, without pruinosity. Female. 



at- date Walker. 

 aa. Thorax brownish gray with darker vittae; opaque. 



sih'cstris Fall. 



There is a female specimen in the Cornell University col- 

 lection from Truro, Nova Scotia, of the second species which 

 I cannot distinguish from my European specimen. Walker 

 (List, IV) described three species from Canada, which Stein, 

 with a slight doubt in each case, considers syimnvmous with 

 syh'cstris. A study of the descriptions reveals but trifling 

 differences. 



