292 Annals Entomological Society oj America [Vol. VI, 



18. Agromyza indecisa, new species. 



Female: Frons elongate, fully one and one-third times as long as 

 broad, two-fifths as wide as head; orbits barely darker than central 

 stripe; four equally strong orbital bristles anterior to front ocellus, the 

 upper only slightly lower than anterior ocellus; besides these strong 

 bristles there are several weak hairs situated nearer to eye margin 

 opposite spaces between the bristles; antennae reddish yellow, shaped 

 and bristled as in citreifrons, arista entirely brown-black, distinctly 

 swollen at base, almost bare, not reaching to anterior ocellus; face 

 pale yellow, not produced at mouth margin, slightly keeled; cheeks 

 distinctly higher posteriorly than anteriorly, at highest part one-third 

 as high as eye; bristles much as in citreifrons; eye as high as long; pro- 

 boscis and palpi yellow. Mesonotum black, subshining, disk slightly 

 gray polHnose; lateral margins and humeri pale yellow; four pairs of 

 dorso-central bristles present; anterior to the one in front of suture 

 there is a small bristle which may be abnormal; other bristling as in 

 citreifrons; pleurae brown-black, shining; • sutures yellow, squamas 

 brown; scutellum concolorous with disk of mesonotum, four bristled; 

 postnotum shining black. Abdomen subopaque, brown-black; seg- 

 ments narrowly bordered posteriorly with yellow; ovipositor with base 

 as long as sixth segment; bristles as in citreifrons. Legs yellowish 

 brown; fore coxae, with ventral surfaces and apices of femora yellow; pos- 

 terior mid tibial bristles absent. Wings grayish; second costal division 

 short of twice as long as first; subcostal vein rather distinct; outer cross 

 vein beyond end of first vein, and at about its own length from inner 

 cross vein; first section of fourth vein longer than second; last section 

 of fifth twice as long as penultimate section. Halteres yellow. 



Length, 1.5 mm. 



Type: Cat. No. 15568, U. S. N. M. 



Locality: Las Vegas, New Mexico, June, 1901, 11,000 

 feet level, (T. D. A. Cockerell). 

 Food-plant unknown. 



19. Agromyza varifrons Coquillett. 



Syn: Agromyza varifrons Coquillett, Jour. N. Y. Ent. Soc, Vol. X, 1902, p. 189. 



Female: Frons parallel-sided, subopaque, center stripe and orbits 

 clear reddish yellow on lower half, blackened on upper half; orbits 

 differentiated from center stripe, very narrow, each about one-fifth as 

 wide as center stripe; four orbital bristles present, which are slightly 

 reduced in strength from upper to lower bristle; no hairs on orbits 

 besides the bristles; antennas yellow, darkened on third joint at insertion 

 of arista ; second joint with dorsal bristle and weak apical hairs; third joint 

 rounded in front, of moderate size, not longer than broad, covered with 

 thick, but very short, white pilosity ; arista brown, short, about one and 

 one-third times as long as antenna, and as long as from its base to between 

 upper two orbital bristles ; pubescence very short but close ; face and cheeks 

 yellow, paler than frons, the latter gradually becoming higher towards 



