296 Annals Entomological Society of America [Vol. VI, 



than first and twice as long as outer cross vein; third and fourth veins 

 almost parallel from outer cross vein, only divergent at extreme apices; 

 last section of fifth vein about one-fourth longer than penultimate sec- 

 tion. Halteres yellow. 

 Length, 2 mm. 



Type: Female. Cat.. No. 15569, U. S. N. M. 



Type locality: Fort Collins, Colorado, Webster's No. 

 6G10, (C. N. Ainslie), bred from oats 



Paratypes: Tower City, North Dakota, Webster's No. 

 3047, (G. I. Reeves), swept amongst grass; Fort Collins, 

 Colorado, Webster's No. 6646, reared from Hordeiim jubatum, 

 July, 1910, (C. N. Ainslie); Buckton, Kansas, Webster's No. 

 5555; reared from volunteer wheat, June 11, 1909, (C. N. 

 Ainslie); Hawkins, Summit County, Ohio (?), August 16, 

 1902 (no collector's name) ; Massachusetts (collection Coquillett). 

 I have also examined specimens from C. W. Johnson's col- 

 lection from the following localities: Fern Rock, Pennsyl- 

 vania; Norwich, Vermont, Nantucket, Massachusetts and 

 Hanover, New Hampshire. 



This species is named in honor of the late D. W. Coquillett, 

 whose work has done much to facilitate an understanding of 

 the North American Diptera. 



22. Agromyza longipennis Loew. 



Syn: Agromyza longipennis Loew, Dipt. Amer. Sept. Indig., Cent. 8, 1869, 

 species 90. 



Female: Frons pale lemon yellow, incision above lunule slightly 

 darkened; orbits blackened posteriorly; ocellar region black; breadth of 

 frons equal to over one-third the width of head, in outline the sides are 

 almost parallel or a little divergent anteriorly; four pairs of long orbital 

 bristles present, in addition to the bristles there is an irregular row of 

 weak hairs nearer to eye margins, which begins at base of antennas and 

 •extends to opposite the anterior ocellus; antennse brownish yellow, 

 darker dorsally, of moderate size; second joint with weak hairs on 

 apical margin, and the usual dorsal bristle of moderate length; third 

 joint rounded, covered with thick, but short, pilosity; arista brownish, 

 swollen at base, very thickly pubescent, the pubescence as long as 

 basal diameter of arista, arista as long as from its base to posterior 

 ocelli; face and cheeks clear lemon yellow, the former slightly concave, 

 and with slight keel; cheeks about twice as high at posterior as at 

 anterior margin, at highest part slightly less than one-third the eye 

 height; eye distinctly higher than long, marginal mouth bristles weak 

 but numerous, vibrissa strong. Mesonotum subshining, black; four 

 pairs of almost equally strong dorso-central bristles present; between 

 which are 4-5 rather irregular rows of setulae, no distinctly differentiated 

 bristles between posterior dorso-central s; lateral margins of inesonotum 



