OF WASHINGTON, VOLUME XVI, 1914 181 



I have not seen the species. The meso-pleura is stated by 

 Melander to be "not setulose, " a character not mentioned by 

 Becker. 



Chyromya nigrimana n. sp. 



Male: Yellow, and slightly shining. Head whitish yellow, cheeks al- 

 most white; arista brown, base yellow; ocellar region black, Pleurse whitish. 

 Legs yellow, last tarsal joint of middle legs black. Wings clear, veins 

 yellow. Halteres yellow. Bristles and hairs yellow. 



Frons one-third the width of head at vertex, distinctly narrowed ante- 

 riorlj-; 3 pairs of orbitals present; of almost equal length; center stripe with 

 a few microscopic surface hairs; arista almost bare; cheek at middle half as 

 high as eye; eye as high as long; its long axis diagonal to the longitudinal 

 line of body. Mesonotum with 2 pairs of strong and usually 1 pair of weak 

 dorso-centrals; about 8 rows of setulse between dorso-centrals; mesopleura 

 with a few weak hairs in addition to the usual bristles; scutellum with 

 4 marginal bristles. Hypopygium large and knob-like. Legs without 

 bristles, except on the postero-dorsal surface of fore femora. Wings with 

 inner cross vein at two-fifths from apex of discal cell; penultimate section 

 of fourth vein about one-fourth the length of ultimate section and sub- 

 equal with ultimate section of fifth. 



Female: Similar to male except that the last joint of mid tarsus is slightly 

 brownish instead of black. Abdomen slightly pointed at apex. 



Length: 1.5 mm. 



Type locality: Urbana, 111., May 20, 1914 (C. A. Hart and J. R. 

 Malloch). Taken by sweeping vegetation along the bank of 

 Salt Fork at the Fair Gounds. 



Paratypes: St. Joseph, 111., May 3-17, 1914 (J. R. Malloch). 

 On bank of Salt Fork. 



Chyromya concolor n. sp. 



Male and female: Entirely yellow with the exception of the black ocellar 

 spot. 



Differs from the preceding species in having the eyes more elongate and 

 nearly in line with the long axis of the body; the dorso-central bristles 

 stronger, the third pair generally distinct, and the inner cross vein nearer 

 to middle of discal cell (in type at middle). 



Length: 1.5-1.75 mm. 



This species is evidently very close in general appearance to 

 minima but unless Becker erred in his description it cannot possibly 

 be that species. 



Type locality: Monticello, 111., June 21-28, 1914 (C. A. Hart 

 and J. R Malloch). Taken by sweeping vegetation on bank of 

 Sangamon River. 



Paratypes: Muncie, 111., May 24, 1914 (C. A. Hart and J. R. 

 Malloch); Algonquin, 111., June 1-10, 1894 (W. A. Nason). 



