Vol. XXlxl ENTOMOLOGICAL NEWS 183 



Wings strongly blackened on front and basal portion. 



Length 5.5-6 mm. 



9 . Front nearly as wide as one eye, velvet black, a shining triangle 

 in front of the ocelli; parafrontals and parafacials wider than in male; 

 frontal bristles eight or nine, large. Middle tibia with three or four 

 setae on outer front side, otherwise as in male ; hind tibia without 

 erect hairs on inner front side. Wings slightly and rather evenly in- 

 fuscated. Length 6-7 mm. 



84 specimens, of both sexes: SASKATCHEWAN: 2 Farewell 

 Creek, August, 1907. IDAHO: IT Moscow, April 23 to May 

 22; i Craig's Mt., June 21-25, l &94'< ~ Lawyer's Canyon, June 

 16, 1909. CALIFORNIA: 5 Claremont (C. F. Baker). COLO- 

 RADO: 61 Tennessee Pass, July 24-26, 1917. 



Variations : The cruciate frontal bristles of the female are 

 sometimes absent ; some females show the palpi lengthened as 

 in a it ens; the pubescence of the arista is occasionally almost as 

 long as in nit ens. 



Pogonomyia nitens Stein. 



Stein, Berl. Ent. Zeitsch., xiii, 199, 1897 (Spilogastcr ). 

 Malloch, Bull. 111. St. Lab. Nat. Hist., 1915, 356 (flarincrris). 



This species differs from atcrrima in so few characters that 

 a full description is superfluous. The main differences have 

 already been presented in tabular form ; I should add that the 

 palpi in nitens are longer and more slender than is usually the 

 case in atcrrima. 



Ten specimens, both sexes: one female, Algonquin, Illinois, 

 paratype of flarincrris, from Mr. Malloch: eight specimens. 

 Polk County. Wisconsin, collected many years ago by Prof. C. 

 F. Raker, which 1 found in the collections at Stanford Univer- 

 sity ; one female, Waubamic, ( hitario, June 14, 1915 ( H. A. 

 Parrish. Coll.). furnished by Professor Melander. 



I have also seen several Wisconsin specimens in the collec- 

 tions of Professors Marshall and Wilson, in the University of 

 Wisconsin, and Mr. Malloch recently informs me that he has a 

 long series from Illinois; but 1 have never found it in Indiana. 

 All of the recorded dates of collection are in quite earlv sum- 

 mer, and this is also true for atcrrima if the altitude is con- 

 sidered. 



