86 PROCEEDINGS OF THE NATIONAL MWEVM. vol. xxv. 



length 3f wing, separated from the first and not connected with it b3^ 

 a crossvein, apex of first near one-third length of third, fourth forks 

 at small crossvein; length, 2 mm. Two female specimens collcctccl 

 by Mrs. Annie T. Slosson. 



Hahitat. — Bisca3nie Bay, Florida. 



Type.— Cat No. 6155, U.S.N.M. 



CERATOPOGON INERMIS, new species. 



Black, the antenna? and legs dark brown, the palpi, scutellmn, 

 halteres, and tarsi yellow; eyes rather widely separated on the front, 

 mesonotum opaque, on the sides gra}^ pruinose; femora slender, with- 

 out spines, first joint of hind tarsi nearly twice as long as the second, 

 last joint over three times as long as the fourth, without spines, claws 

 large and of an equal size, no empodia; wings hyaline, Ijare, third vein 

 separated from the first, ending near five-sixths length of wing, fourth 

 vein forking slightly beyond the small crossvein; length, nearly 1 mm, 

 A feniale specimen collected June 27 by Mr. H. S. Bar))er, 



Hahitat. — Hot Springs, Yavapai County, Arizona. 



Tyj)e.—C%i. No. 6156, U.S.N.M. 



CERATOPOGON EXILIS, new species. 



Black, the mouth parts, broad margin of scutellum, legs and halteres 

 light yellow; plumosity of antenme whitish, mesonotum polished, legs 

 slender, without spines, first tarsal joint aljout twice as long as the 

 second, the last two of nearlv an equal length, claws small, of an equal 

 size, empodia large; wings hyaline, bare, third vein contiguous to the 

 first, ending near two-thirds length of wing, apex of first vein near 

 middle of the third, fourth A'ein forking slightly beyond the small 

 crossvein; length, 1 nmi. A male specimen collected May 15 by Mr. 

 H. S. Barber. 



Hahitat. — Washington, District of Columbia. 



Type.—OAt. No. 6157, U.S.N.M. 



CERATOPOGON STIGMALIS, new species. 



Black, the knolxs of halteres light yellow, legs brown, both ends of 

 the tlhiie and whole of tarsi except apices of the joints yellow; eyes 

 contiguous, mesonotum apparently subopaque (injured), legs slender, 

 not spinose, first joint of hind tarsi about twice as long as the second, 

 the fifth twice as long as the fourth, not spinose l)elow, claws on all 

 tarsi unequal in size, the longest almost as long as the last tarsal joint; 

 wings hyaline, bare, third vein considerably thickened, ending near 

 three-fifths length of wing, connected to the first by a crossvein, apex 

 of first vein near three-fourths length of the third, costa emarginate 

 at apex of the latter, lower branch of fourth vein obliterated except 



