Sept., I9I3-] Melander: Synopsis of Diptera. 269 



I 



lunule cinereous, differing in this respect from the other specimens 

 of viaura. The face is receding and slightly carinate, and the tip of 

 the abdomen is bronzed. 



Agromyza tritici Fitch. Length 2 mm. Black, the lower part of 

 the front and the oral margin yellowish; legs blackish; knees yellow; 

 fourth vein evanescent beyond the small discal cell. New York. The 

 description is too brief to place this species in the table. It suggests 

 Mconciira or Napoiiiyaa rather than Agromyza. The figure shows 

 the costa stopping at the third vein. 



Table of the Species of Phytomyza. 



Front narrow; third antenna! joint ending in a point, as in Ccrodonta ; third 

 vein ending far before the tip of the wing. (Eur.; Wash.*) 



aciiticornis Loew. 

 Front normally broad ; the third antennal joint not pointed 2. 



2. Front principally black or cinereous; antennae black 3. 



Front and cheeks largely yellow 11. 



3. Abdomen yellow, except the tip ; thorax and legs opaque cinereous black ; 



mesonotum densely hairy between the bristles. (N. Y.*) 



bicolor Coquillett. 

 Abdomen mostly black (sometimes the incisures narrowly yellow) ; meso- 

 notum not densely hairy 4. 



4. Frontal orbits whitish, contrasting with the brownish central portion of 



the front ; anterior dorsocentrals small ; cheeks one-sixth the eye- 

 height; arista slender. (Id.,* Wash.*) orbitalis n. sp. 



Front blackish, the orbits concolorous ; four dorsocentrals 5. 



5. Frontal orbits, thorax and abdomen shining; wings nearly hyaline 6. 



Frontal orbits opaque ; thorax more or less dusted ; four fronto-orbitals. 



(obscurella Fallen.) 7. 



6. Entirely black, except the halteres and proboscis; \ eins blackish up to the 



base; three fronto-orbitals; fringe of calypteres black; third antennal 



joint shorter than deep. (N. Y.,* Id.*) nitida n. sp. 



Legs partly fuscous ; base of wings and notopleural suture yellowish ; four 

 fronto-orbitals ; fringe of calypteres yellow ; third antennal joint 

 longer than deep. (D. C, Ont.*) clematidis Loew. 



7. Wings lightly clouded, especially in front ; mesonotum subshining ; cheeks 



fuscous. (Eur.; Ws^sh.*) ... .obscurella var. nigripennis Zetterstedt. 

 Wings not with fuscous tinge, the marginal cell not brownish 8. 



8. Cheeks black ; abdomen and legs generally black 9. 



Cheeks brown; sides of abdomen, some of the incisures, and the knees 



generally yellowish 10. 



9. Knees paler; second section of the costa four times longer than the third 



