320 Annals Entomological Society oj America [Vol. VI, 



46. Agromyza abnormalis, new species. 

 Plate XXIX, Fig. 9. 



Fentale: Frons black-brown; center stripe opaque; orbits black, 

 shining; breadth of frons over one-third that of head; orbits at widest 

 part one-third as wide as center stripe at that part; five strong 

 orbital bristles present, and in the type a weak one anterior to the 

 lower strong one; upper two bristles situated near to inner margin of 

 orbits, the others nearer to center; besides the bristles there are scat- 

 tered short hairs present on the orbits nearer to eye margin than bristles; 

 ocellar region raised, shining black; ocellar triangle not defined; frons 

 in profile slightly protruding anteriorly; antennae black-brown, of 

 moderate size; dorsal bristle on second joint distinct; third joint rounded 

 in front, slightly longer than broad, pilosity very short; arista rather 

 thick, swollen more distinctly on basal fifth, pubescence short, but 

 distinct; length of arista equal to from its base to upper orbital bristle; 

 face shining black, slightly retreating, mouth margin not produced, 

 center keel very slight; cheek opaque brown, half as high anteriorly as 

 posteriorly, where it is half as high as eye ; marginal bristles of moderate 

 length; the vibrissa slightly differentiated; proboscis yellow; palpi 

 black, normal; occiput slightly projecting. Mesonotum black, sub- 

 shining; four pairs of dorso-centrals present, the anterior pair in front 

 of suture, discal setulas numerous and rather regularly arranged in 

 rows, of which there are about five between the dorso-centrals; no 

 differentiated bristles between posterior pair of dorso-centrals; pleurae 

 shining black, the sutures and below wing base brown; squamae gray- 

 brown, margins black-brown, fringe brown; scutellum concolorous with 

 disk of mesonotum, the bristles subequal. Abdomen black, glossy; 

 segments rather strongly setulose; ovipositor very glossy black. Legs 

 black, tibiae and tarsi brownish; mid tibia without posterior bristles. 

 Wings grayish; first costal division distinctly over one-half as long as 

 second; subcostal vein indistinct, but complete, not fused with first 

 at its apex; inner cross vein distinctly, but not greatly in front of end 

 of first vein, and at or shghtly beyond middle of discal cell; outer cross 

 vein at about its own length from inner and very slightly beyond end 

 of first vein; veins 3-4-5 gradually and slightly divergent on their last 

 sections; last section of fifth vein twice as long as penultimate section. 

 Halteres brown. 



Length 3 mm. 



Type: Cat. No. 15583, U. S. N. M. 



Locality: Washington, District of Columbia, June, 1903, 

 No. 9727— "on Aphid"— "On roots of Amaranthus." 



Paratype: labeled "Twilight" Lawrence, Kansas, (E. S. 

 Tucker). 



