94 DIPTERA OF NORTH AMERICA. [PART IV. 



that of the first longitudinal vein. The outline of the wing is 

 peculiar, as it is hardly narrowed at all towards the apex. 



Hah. Trenton Falls, N. Y. ; on fences, in September, numerous 

 male and female specimens. 



t. L.. indigeiia 0. S. % and 9- — Flavescens ; tliorace vittis, ab- 

 domine fasciis fuscis ; alls fusco-nebulosis ; venule transversa mar- 

 ginali ab apice venae longitudinalis primae remota. 



Yellowish, thorax with brown stripes, abdomen with brown bands ; wings 

 clouded with brown ; the marginal cross-vein at some distance from the 

 tip of the first longitudinal vein. Long. corp. 0.4 — 0.45. 



Syn. Limnobia indigena 0. Sa.cken, Proc. Ac. Nat. Se. Phil. 1859, p. 215. 



Head black, front with a silvery reflection ; antennae and palpi 

 black ; first joint of the flagellum nearly twice the length of the 

 second. Thorax pale brownish-yellow, shining, with three dark 

 brown stripes, the intermediate one is double and does not quite 

 reach the transverse suture ; scutellura dark brown with a yellow 

 line in the middle ; metathorax brown ; pleurae with a brown 

 stripe, running from the basis of the wings to the intermediate 

 coxoe ; a large brown spot anterior to the basis of the halteres ; 

 the latter pale yellow, faintly infuscated in the middle of the 

 stem ; feet yellowish-tawny, with two brown bands on the femora 

 and a pale one between them ; tip of the tibiae and the tarsi in- 

 fuscated. Abdomen brown ; base of the second and of the follow- 

 ing segments with a broad yellow band ; forceps of the male like 

 Tab. Ill, fig. 1. Wings tinged with yellowish, stigma brown ; 

 central cross-veins clouded with brown; three brow^n clouds form 

 an interrupted and more or less distinct band, in the middle of 

 the first basal cell, on the fifth longitudinal vein and across the 

 anal and axillary cells ; veins in the apical portion of the wing 

 all margined with fuscous : the marginal cross-vein is anterior to 

 the middle of the stigma. 



Ilab. Maine (Packard) ; Upper Wisconsin River (Kennicott) ; 

 Washington, D. C. ; New York. May, June. 



S. L,. tristignia 0. S. '^ and 9- — Ferrugineo-flava, capite nigro, 

 thoracis vitta fusca ; alis flavescentibus immaculatis, nebulis quatuor 

 marginalibus parvis, pallide fuscis ; venula transversa marginal! ab 

 apice vense longitudinalis primse remote,. 



Ferruginous-yellowish, head black, thorax with a brown stripe ; wings 



