AMERICAN DIPTERA. 367 



in the male noticeably contracted toward the base, this constriction 

 being greatest between the second and third segments. 



Face and front light golden, sometimes nearly white, pruinose; 

 antennae and palpi yellowish. Hair of antennae black ; of the palpi 

 yellowish or black; bristles of the occiput behind the vertex brownish 

 or black, lower down and along the outer orbits reddish. Thoracic 

 stripes velvety black, the median one but indistinctly divided by a 

 reddish stripe and abbreviated posteriorly behind the transverse 

 suture; separated from the lateral stripes by a clearly defined light 

 golden pruinose stripe. Lateral stripes narrowly bisected at the 

 transverse suture, much attenuated posteriorly; lateral margins of 

 dorsum broadly golden pruinose. Hair and bristles of entire dorsum 

 and before the halteres black ; scutellum reddish with two marginal ■ 

 bristles black. Abdomen elongate, more cylindrical, rather slender ; 

 in the male distinctly contracted toward the base, the constriction 

 being greatest between the second and third segments; the female 

 abdomen is a trifle stouter, but is not contracted as in the male: in 

 both sexes the abdomen is wholly reddish, without black or golden 

 spots of any sort, but sometimes darker on the distal half; the short 

 hairs black, golden on the distal portion and on the reddish hypo- 

 pygium. Wings rather broad, yellowish hyaline; the entire half and 

 the posterior margin brownish. Legs wholly yellowish-red, long, with 

 black and reddish hairs, and black bristles. 



Type.—U. C. Z. 



Habitat. — Cuba (type) ; St. Augustine, Fla. (C. W. Johnson) ; 

 Round Mt., Tex.; Las Cruces, N. M. (Aug. 19, C. H. T. Towns- 

 end) ; Garden City, Ks. (Aug.) ; Mo. ; Rocky Ford, Col. (Aug. 7). 



I have before me eight specimens of this species representing 

 both sexes. They are easily separated from the other species 

 by the long cylindrical abdomen, which in the male is de- 

 cidedly contracted toward base, and in this regard somewhat 

 resembles Blepharepium coarctatum. The legs are very long 

 and "scraggly." It is much larger than winthemi. 



Deroniyia iinibrina. 



Diogmites umbrintis Loew, Cent., VII, 43, 1866. 



f Dasypogon herennius Walker, List, II, 339, 1849 (query by J. 



M. A.). 

 Diogmites umbrinus Osten Sacken, Cat., 233, 1878; note on type 



of D. basalis Walker. 

 Deroniyia umbrina Williston, Trans. Am. Ent. Soc, XI, 25, 1884 



(note) . 

 Deromyia herennius Howard, Insect Book, 1902, PI. XIX, fig. 18. 



TRANS. AM. ENT. SOC, XXXV. SEPTEMBER, 1909 



