ADAMS : NORTH AMERICAN DIPTERA. 449 



joints of fore tarsi and last two of both intermediate and hind 

 tarsi blackish. The interrupted brown border of the wings does 

 not reach the third longitudinal vein, the remainder of the 

 wing very indistinctly reticulated, the hyaline spots arrange 

 themselves on each side of the veins and leaves a very narrow 

 brown band in the center of the interval. Length, 4.5 mm. 

 One specimen ; Washington. 



ICTERICA. 



TABLE TO THE SPECIES. 



1. The brown border at apex of wing contains a hyaline streak following the 



margin from just beyond the tip of second vein to just before tip of 



fourth vein fasciata, n. sp. 



The brown border not interrupted at this point 2 



2. Two large brown spots completely surrounding the cross-veins, 



lichtensteinii Wied. 

 Brown near cross- veins dissolved into smaller reticulations 3 



3. The recticulations in the center of wing consist of small angular spots, 



arranged in double rows between the veins seriata Loew. 



The reticulations consist of small brown ringlets, either open or closed, 



circinata Loew. 



Icterica fasciata, n. sp. 



Male and female : Head and members yellow, arista, except 

 extreme base, and bristles of front brownish. Thorax yellow, 

 covered with yellow pollen and pile, bristles of mesonotum and 

 scutellum yellowish brown, the latter four in number, halteres 

 yellow. Abdomen yellow, shining, with yellow pile and pollen, 

 ovipositor shining, its tip black. Legs, their bristles and pile, 

 yellow. Wings brownish yellow reticulated, the reticulations, 

 as in I. circinata Loew, consist of brownish ringlets, some open 

 and some closed, but near the center of the wing the ringlets 

 are of bolder face and of a darker shade of brown, causing a 

 distinct band, arising at stigma and passing over both cross- 

 veins to posterior border of wing, it is slightly concave, the 

 concavity toward the base of wing, the costal border before 

 stigma is yellow except for two indistinct brownish spots, and 

 then for two-thirds the distance to tip of second vein is yellow, 

 except for one small spot, the last third of this distance, or just 

 before second vein, is brown save for two, sometimes three, 

 small yellow spots, the first of which attains the costa, from 

 tip of second vein there is a continuous brown band bordering 



