Sept., 1913-] Melander: Synopsis of Diptera. 265 



This species is structurally very close to pacifica, differing but 

 slightly in the neuration. The setulae of the mesopleurse are less 

 evident in pacifica and the arista is less robust and more openly pubes- 

 cent. The blackened knob of the halteres is unusual for this section 

 of the genus. 



Agromyza clara new species. 



Male. — Length i mm. Face, cheeks, lower occiput, lower front, antennje, 

 mouth-parts, halteres, legs and most of pleurae whitish to pale yellow. Upper 

 occiput, vertex, mesonotum except lateral margins, scutellum, metanotum ex- 

 cept a subscutellar cinereous line, spots on sternopleuras and hypopleurae, and 

 abdomen except very narrow incisures, black or blackish. Front very broad 

 and square, with three fronto-orbitals ; the ocellar bristles reaching about one 

 third the distance to the antennae ; face greatly receding, nearly flat ; antennae 

 porrect rather than decumbent ; cheeks about one half the eye-height, a single 

 vibrissa and a single oral hair present. Apparently three dorsocentrals present, 

 acrostichals very sparse ; pleurae not setulose. Calypteres with dusky margin 

 and fringe. Tarsi a little darkened ; no tibial bristles. Wings hyaline, veins 

 rather strong and dark ; third section of costa equal to fourth and about one 

 fourth the length of the second section ; discal cell small, the anterior crossvein 

 before the end of the first vein, and beyond the middle of the discal cell ; 

 fourth vein ending at wing tip, its segments about one to ten ; basal section 

 of fifth vein but little more than one half the length of the distal section. 



One specimen, Mount Constitution, Orcas Island, Washington, 

 July 31, 1908. 



Agromyza lima new species. 



Male. — Length 1.5 mm. Yellow and black in color, the following parts of 

 the body are pale yellow ; head, except center of occiput, most of pleurae, sides 

 of mesonotum, most of scutellum, incisures of abdomen, antennae, mouth-parts, 

 halteres, calypteres, root of wings, and most of legs. The following parts of 

 the body are black and more or less overlaid with grayish pollen ; small ocellar 

 triangle, occiput except orbits, a humeral spot, disk of mesonotum extending 

 to the scutellum and scarcely notched along the sides, spot in meso- and sterno- 

 pleurae, the last-mentioned largest ; basal angles of scutellum, metathorax 

 largely, and abdomen mostly, except narrow incisures and broader sides of 

 the segments; the hypopygium is also black. Front slightly longer than broad 

 and narrower toward the antennae ; three or four small fronto-orbitals ; ocellar 

 bristles reaching about one third the length of the front. Antennae reaching 

 half way to the epistome, the arista two times the length of the third joint, 

 its base yellowish. Face moderately carinate ; cheeks nearly as deep as the 

 eye-height ; vibrissae not longer than the four or five oral hairs. Two dorso- 

 centrals, no setulae ; meso- and sternopleurae bare except for the single small 



