1913] Agromyza and Cerodontha. 305 



Lafayette, Indiana, (P. Luginbill) Webster's No. 9700, reared 

 from timothy grass, and two specimens with the No. 6719, 

 July 13, 1895, District of Columbia. There is one specimen 

 in C. W. Johnson's collection from Auburndale, Massachusetts. 



"30. Agromyza setosa Loew. 

 Syn: Agromyza setosa Loew, Dipt. Amer. Sept. Indig., Cent. 8, 1869, species 83. 



Male and Female: Frons "black or black-brown; center stripe 

 opaque; orbits shining; width of frons equal to slightly over one-third 

 the width of head; orbits about one-half as wide aS center stripe; five 

 orbital bristles present, situated nearer to inner than outer margin of 

 orbits; in addition to the bristles there are nimierous short hairs pres- 

 ent, between the eye margins and the bristles, which are particularly 

 numerous on the lower half of 'orbit and terminate in an irregular row 

 at about level of upper orbital bristle; ocellar region shining; ocellar 

 triangle slightly indicated, shining; antennae black, moderately large; 

 second joint slightly over the average size, with numerous hairs, the 

 usual bristle distinct; third joint rounded at apex, barely longer than 

 broad, covered with short brownish pilosity; arista brown, for a short 

 space paler beyond the distinctly thickened base; pubescence short 

 but distinct, very close; length of arista equal to from its base to the 

 second uppermost orbital bristle; face and cheeks black -brown; the 

 former perpendicular and with a rounded central keel; cheeks increasing 

 in height from anterior to posterior margin, where they are about one- 

 fourth the height of eye; marginal bristles of moderate length, in two 

 rows, and rather numerous, the upper row upwardly directed; vibrissa 

 differentiated; probocis brown; palpi black, of moderate size, rather 

 numerously bristled; eyes microscopically haired. Mesonotum sub- 

 shining black; thickly covered with hairs and with four pairs of dorso- 

 central bristles, the anterior pairs much reduced and the front pair 

 not much stronger than the other dorsal hairs; the pair of bristles 

 between the posterior dorso-centrals distinct, and of moderate length; 

 pleurae concolorous with disk of mesonotum, only brownish below 

 wing base; squamae brown, fringe concolorous; postnotum and scutellum 

 colored as pleurae. Abdomen concolorous with thorax; the surface 

 rather thickly covered with hairs; sixth segment with some bristle- 

 like hairs on posterior margin; hypopygiiun of male almost similar to 

 that of parvicornis; ovipositor of female with base thickly covered with 

 hairs. Legs black, tibiae and tarsi black brown; posterior bristles on 

 mid tibiffi very weak. Wings grayish, veins brown; first costal division 

 nearly one-half as long as second; subcostal vein indistinct, almost 

 coalescent with first at its apex; costa thickened at end of first vein; 

 inner cross vein at slightly beyond end of first vein or at just below it; 

 outer cross vein at slightly beyond wing middle, and at slightly more 

 than its own length from inner cross vein ; last section of fifth vein about 

 one-half as long as pentdtimate section; veins 3-4 only slightly diver- 

 gent at apices. Halteres yellow, stalk darkened at base. 



Length 3-4 mm. 



