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. 



Hab. Trenton Falls, K Y. ; on fences, in September, numerous 

 male and female specimens. 



?. L. indigena 0. S. % and £• — Flavescens ; thorace vittis, ab- 

 doniine fasciis- fuscis ; alis fusco-nebulosis ; venula transversa mar- 

 ginal! 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. 



Stn. Limnobia indigena 0. Sacked, Proc. Ac. Nat. Sc. 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 ; scutellum 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 

 coxae ; 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. 7. Wings tinged with yellowish, stigma brown ; 

 central cross-veins clouded with brown; three brown 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. 



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

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



S. Li, tristigma 0. S. % and $>• — Ferrugineo-fiava, capite nigro, 

 thoracis vitta fusca ; alis flavescentibus immaculatis, nebulis quatuor 

 marginalibus parvis, pallide fuscis ; venula transversa marginali ab 

 apice venae longitudinalis primae remota. 



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



