\'ol. xxix] ENTOMOLOGICAL NEWS 183 



Wings strongh- lilackened on front and liasal 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 nun. 



84 specimens, of both sexes: Saskatchewan: 2 Farewell 

 Creek. August, 1907. Idaho: ii Moscow, April 23 to May 

 22; I Craig's Mt., June 21-25, 1894; 2 Lawyer's Canyon, June 

 16. 1909. Californl\: 5 Clareniont (C. F. Baker). Colo- 

 rado: 61 Tennessee Pass, July 24-26, 191 7. 



\"ariations : The cruciate frontal bristles of the female are 

 sometimes absent ; some females show the palpi lengthened as 

 in )iifciis; the pubescence of the arista is occasionally almost as 

 long as in iiifciis. 



Pogonomyia nitens Stein. 



v^tein, Berl. Ent. Zeitsch.. xiii, 199. 1897 (Spilocjasfcr) . 

 Malloch, Bull. 111. St. Lab. Nat. Hist., 1915, 356 (flm-inervts) . 



This species differs from afcrrima 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 iiitois are longer and more slender than is usually the 

 case in atcrrima. 



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

 paratype of flavincrz'is, from Mr. Malloch; eight specimens, 

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

 F. Baker, which I found in the collections at Stanford Univer- 

 sity ; one female. Waubamic. Ontario. 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 LTniversity of 

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

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

 A.\\ of the recorded dates of collection are in quite early su(m- 

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

 sidered. 



