260 Journal New York Entomological Society. [^'°1- ^^I- 



ened at the junction of the first vein; auxiliary vein separate from the first 

 vein, but closely approaching it near the tip ; basal section of front edge of the 

 discal cell twice as long as the other section, the latter nearly equalling the 

 posterior crossvein, and about one fourth the length of the ultimate section of 

 the fourth vein; sections of the fifth vein three to two; anal vein faint; the 

 third section of the costa nearly equal to the fourth and about one fifth the 

 length of the second section. 



One specimen, Hayti. 



While the auxihary vein ends independently in the costa, it ap- 

 proaches very closely to the first vein near its end. Its course is thus 

 quite different from that found in the lighter colored species of 

 Agromyza. 



Agromyza maura var. setifrons new var. 



Male. — Seven fronto-orbital bristles, orbital pubescence long; crossveins 

 not approximate, the outer segments of the fourth vein proportioned about one 

 to four, discal segment of the fifth vein a little longer than the last segment ; 

 third vein uniformly curved backward so that it diverges from the second and 

 ends almost at the wing tip, fourth vein ending considerably beyond the tip 

 of the wing ; wings broadly rounded ; four sternopleural bristles in the upper 

 series ; abdomen black. 



One male, from Troy, Idaho, June 14, 1908, collected by William 

 M. Mann. 



The variations of maura indicate permutations of the characters 

 rather than phyletic segregations. The differences between maura 

 and morionella, as stated by authors and repeated in the table, do not 

 exactly tally on the score of European specimens before me. The 

 varieties named in the table are distinct enough in their sets of char- 

 acters, but probably additional specimens from other localities will 

 disclose other combinations lessening the definiteness of varietal limits. 



Agromyza maura var. nasuta new var. 



Male. — Length 2 mm. Ocellar triangle long, its sides concave, the pol- 

 ished frontal orbits with numerous hairs, only the convergent lowermost two 

 fronto-orbital bristles present. Face with a prominent tubercle present be- 

 tween the antennse in lieu of a carina, the subantennal grooves deep ; vibrissal 

 angle projecting, as is also the greatly excised edge of the epistome. Antennse 

 reaching below the middle part of the excision of the epistome, the arista 

 three times as long as the last joint. Palpi slender, somewhat curved, but 

 not flattened. Second section of the costa less than four times as long as 

 the third, which is subequal to the fourth section ; anterior crossvein at two 



