1913] Agromyza and Cerodontha. 317 



in size. Abdomen glossy black; all segments with numerous short 

 hairs on dorsum; those on lateral margins of segments longer; the 

 posterior margin of last abdominal segment not noticeably bristly; 

 last segment slightly elongated; hypopygium small. Legs black- 

 brown, shining, tibiae and tarsi paler; posterior bristles on mid tibia 

 present, but not large. Wings clear; veins brown; first costal division 

 fully one-half as long as second; subcostal vein indistinct, fused with 

 first at near apex; inner cross vein below swelhng caused by junction 

 of first vein and costa; outer cross vein at wing middle, and at nearly 

 its own length from inner; last section of fifth vein shghtly shorter 

 than penultimate section. Halteres black. 



Length 3.5 mm. 



Female: Similar in color and size to the male, but the cheeks 

 as in figure 25; the last segment of abdomen has the bristles at apex 

 stronger than in the male; and the ovipositor is glossy black. 



Type: Cat. No. 15579, U. S. N. M. 



Locality: Georgia, no other data on specimens. Two 

 males, one female. 



Food-plant unknown. 



43. Agromyza affinis, new species. 



Female: Frons black, center stripe opaque, orbits shining; breadth 

 of frons slightly over one-third the head width; orbits less than one- 

 half the width of center stripe: four strong orbital bristles present, on 

 both sides there is a weaker bristle close under the front one; hairs 

 on orbits, between bristle and eye margin, short, but ntmierous, on 

 front half of orbit; antennas black, of moderate size; second joint with 

 distinct dorsal bristle; third joint rounded, pilosity very short, dark; 

 arista black, basal swelhng slight and tapering, pubescence very short 

 and close; length of arista equal to from its base to a little beyond 

 second uppermost orbital bristle; face black, opaque, concave in pro- 

 file, mouth margin produced, keel distinct ; cheek black, brown on lower 

 half, higher anteriorly then posteriorly, vibrissa very clearly differ- 

 entiated from the inarginal bristles; proboscis brown; palpi in type 

 retracted. Mesonotum shining black; two distinct pairs of dorso- 

 centrals present; disk covered with short setrdse, which are carried 

 back beyond the transverse line of the posterior pair of dorso-centrals; 

 pleurce shining black, brownish along sutures and below wing base; 

 squamas brown-black, fringe almost black; scutellum concolorous with 

 disk of mesonotum. Abdomen glossy black; all segments with discal 

 setulae; those on posterior margin of sixth segments most noticeable, 

 but not strong; base of ovipositor distinctly longer than preceding 

 segment, its surface covered on the sides and apex with short hairs. 

 Legs entirely black, shining; posterior surface of mid tibia without 

 distinct bristles. Wings grayish, veins brown; outer cross vein at dis- 

 tinctly less than its own length from inner, and at wing middle; last 

 section of fifth vein distinctly shorter than the penultimate section. 

 Halteres black. 



Length 2 mm. 



