370 ERNEST A. BACK. 



Type. — The type of misellus is at the M. C. Z. 



Habitat.— Mass. (July 10-Aug. 30); Conn.; N. Y. ; N. J. 

 (July 12-Aug. 18); D. C. (type, misellus); Raleigh, N. C. 

 (July 15) ; Ga. ; Fla. ; Tex. ; 111. 



Loew states that this species (i. e. his misellus) is easily dis- 

 tinguished from ternata by the smaller body, by the longer 

 thoracic hair, and by the median stripe being always reddish 

 anteriorly, and, finally, ,by the anal cell of the wing being 

 wholly destitute of microscopic pubes. I do not put any 

 faith in the presence or absence of microscopic pubes in the 

 anal cell in this species, for of the twenty-four specimens be- 

 fore me representing captures from Massachusetts, Florida 

 and Texas, I find that this is variable, the females being more 

 apt to possess these pubes than the males. Loew's type is 

 of the male sex. 



LESTOMYIA. 



Lestomyia Williston, Trans. Am. Ent. Soc, XI, 19, 1883. 

 Clavator Phillippi, see Osten Sacken, West. Dipt., 292, 1878. 



Front tibise with a terminal curved spur. Head similar to 

 that of Cyrtopogon, but smaller and narrower (narrower, also, 

 than that of C. punctipennis as figured by Phillippi, 1. c, pi. 

 XXVII, fig. 29) ; mouth larger and more oblique; sides of the 

 face only a little diverging below, gibbose, the pile or hairs in 

 the middle of the gibbosity not reaching the antennse or eyes. 

 First joint of the antennae subcylindrical, short, the second 

 yet shorter, the third longer than the first two taken together, 

 narrow at the base, and then expanded to twice or three times 

 as wide, gently narrowed and then rounded at the tip; at the 

 end with a minute cylindrical style, ending in a microscopic 

 bristle. Ocellar tubercle, dorsum of thorax and edge of 

 scutellum with stout bristles. Abdomen subcylindrical, nar- 

 row, somewhat broader at the base, male hypopygium not 

 stouter than the abdomen; female ovipositor with a star of 

 short spines. Legs rather strong; tibiae and tarsi spinose; 

 front and middle femora with a single spine on the hind side 

 a short distance from the tip. Claws and pulvilli long. Wings 

 like those of Cyrtopogon; anal cell very little open, sometimes 

 closed ; anterior cross-vein about the middle of the discal cell ; 



