270 Maine; agricultural experiment station. 1909. 



long as the body, blackish apically. Stripes on mesonotum and 

 spots on the pleura sub fuscous; abdomen blackish apically; 

 hypopygium blackish. Coxae yellow, posterior pairs fuscous at 

 the apex, pile black; legs pale, tarsi subfuscous. Wings yellow- 

 ish with light cinereous tinge, apically and posteriorly with 

 rather long pile ; a rather large central spot, fuscous ; a complete 

 subapical fascia and apex of wing, fuscous-cinereous ; apex 

 of Ri not thickened ; R2+3 very long and bent down, length of 

 wing 5 mm. Halteres yellow. Recorded from the District of 

 Columbia. 



In the type specimen the distance from Ri to R2+3 is about 

 1-3 or 1-4 as great as from R2+3 to R4+5, and the bands at apex 

 of wing are not connected with each other by clouds along the 

 veins. 



8. Macrocera formosa Loew. 

 1866. formosa Loew, Berl. Ent. Zeitschr. X. 6. 



Male and female. Length 4 mm. Pale yellow. Antennae 

 yellow, darkened apically. Thoracic stripes wholly lacking or 

 but faintly indicated. Posterior margin of each abdominal seg- 

 ment black, the last three in the male sometimes wholly black, 

 forceps yellow. Legs pale, tips of the middle and hind femora 

 black, of hind tibiae subfuscous, tarsi subfuscous, darker towards 

 the tip. Wing hyaline, apically and posteriorly with longer pile ; 

 a minute blackish spot near the base, a large spot on the middle 

 extending from the costa to the cubitus ; apex with two fasciee, 

 the first subapical, arcuate, the second apical; these bands 

 coalescing on the costa and along the course of the veins. 

 Recorded from New York. 



Var. indigcna, n. var. Differs from Loew's type specimen in 

 having three distinct thoracic stripes which are usually brown, 

 though in one specimen is almost black. The hypopygium is 

 dusky yellow in the paler specimens, but is usually dark brown. 



Male. Head and mouth parts yellow, vertex brown, antennae 

 yellow, infuscated toward the tip, about one and two-thirds times 

 the length of the insect; mystax black. Thorax yellow with 

 three dark brown stripes on mesonotum; sternum, metanotum 

 and a spot on pleura near base of wing brown; setae black; 

 scutellum pale yellow with transverse row of small black set^e. 



