278 Annals Entomological Society of America [Vol. VI, 



palpi pale yellow, of nonnal size, bare. Mesonotum shining black on 

 disk, finely granulose; lateral margins broadly pale yellow; hiimeri 

 brown; four pairs of dorso-central bristles present, the posterior pair 

 more widely separated and stronger than the others ; in addition there 

 is in the type an additional pair of bristles, sHghtly anterior to the front 

 pair, which may be abnonnal ; no setulee present between dorso-centrals 

 on any part of disk; pleurae glossy black, sutures narrowly yellow; 

 squamae pale yellow, fringe concolorous; scutellum pale yellow on disk, 

 broadly black on sides; normal bristles four, but the type has an 

 adventitious bristle close to base of posterior one on left side; post- 

 notum glossy black. Abdomen glossy black; a narrow posterior 

 marginal band on all segments, and a narrow longitudinal dorsal line 

 on last three segments yellow; base of ovipositor glossy black; all seg- 

 ments with dorsal hairs, those on apex of sixth segment bristle-like. 

 Legs yellow; blackened more or less on mid and hind coxse; bases of 

 femora; apices of tibiae, and all tarsi; mid tibia without posterior 

 bristles. Wings clear; first costal division one-half as long as second; 

 subcostal vein distinct, outer cross vein at slightly before the end of 

 first vein, and at about its own length from inner cross vein; last section 

 of fifth vein four times as long as penultimate section; veins 2-3-4 

 gradually divergent on their last sections, the cells enclosed by these 

 veins of equal width at below apex of second vein. Halteres yellow. 

 Length, 1.5 mm. ^ 



Type: Cat. No. 15559, U. S. N. M. 



Locality: Adamana, Arizona, May 7, 1903 (H. S. Barber) 

 one female. 



This species is so evidently distinct from those of the 

 pusilla group that I consider it safe to describe it from a single 

 specimen. 



Food-plant unknown. 



4. Agromyza pusilla Meigen. 



Syn: Agromyza pusilla Meigen, Syst. Beschr, Vol. 6, 1830, p. 185, species 60. 



Agromyza pumila Meigen, 1. c. p. 185, species 62. 



Agromyza strigata Meigen, 1. c. p. 186, species 63. 



Agromyza exilis Meigen, 1. c. p. 186, species 64. 



Agromyza orbona Meigen 1. c. p. 186, species 65. 



Agromyza pusio Meigen, 1. c. p. 187, species 66. 



Agromyza pvella Meigen, 1. c. p. 187, species 67. 



Agromyza amoeyia Meigen, 1. c. p. 187, species 68. 

 (?) Agromyza blanda Meigen, L c. p. 188, species 69. 

 (?) Phytomyza diminuta Walker, Trans. Ent. Soc. Lond., n. ser. 4, 1857, p. 232. 



Oscinis Irifolii Burgess, Dept. Agric. Rept. 1879, p. 201. 



Oscinis brassicce Riley, Dept. Agric. Rept. 1884, p. 322. 



The above synonomy is I am confident correct, as an 

 •examination of a large number of specimens from widely 

 separated localities, including Europe, and many states in the 

 Union, reared from different food plants proves that all the 



