230 



removed from the tip of Sci, the latter longer than m-cu; Rs in alignment with 

 R2+3, about one-half longer than the basal deflection of Ri+$; cell 1st Mi 

 relatively small; m-cu variable in position, usually before the fork of M. 



Abdominal tergites dark brown, the sternites more yellowish, especially the 

 basal segments; hypopygium reddish brown. Male hypopygium with the 

 caudal margin of the ninth tergite with a deep V-shaped notch, the lateral lobes 

 conical, darkened, setiferous. Basistyle with the ventro-mesal lobe large, ap- 

 pressed to the mesal face. Ventral dististyle relatively small, the rostrum 

 stout, bearing a single spine. Dorsal dististyle slender, strongly curved, the 

 tip acute. Mesal lobe of each gonapophysis slender, gently curved, the tip 

 blackened. Anal tube with a conspicuous group of about seven or eight 

 . strong spinous setae. 



Range. — Northeastern North America. 



Holotype, male, Whately Glen, Franklin Co., Mass., altitude 250 feet, Oc- 

 tober 4, 1925 (Alexander). Allotype, female, Mt. Toby, Mass. Septem- 

 ber 15, 1925 (Alexander) . Paratopotypes, numerous alcoholic specimens 

 (Crampton); paratypes, Orient Springs, Hampshire Co., Mass., altitude 375 feet, 

 September 18, 1925; Holyoke Range, Hampshire Co., Mass., altitude 700 feet, 

 October 3, 1926; Halifax Gorge, Vermont, September 6, 1925; Mount Desert, 

 Maine, August 31-September 8, 1926; Gloversville, New York, altitude 900 

 feet, August 31-September 1, 1925 (Alexander). 



Dicranomyia spinifera has been confused in collections with 

 D. halter ata O. S., and it is probable that all late summer and 

 autumnal records for the latter in northeastern North America 

 really pertain to the present species. The fly is very common in 

 shaded places and may be swept in numbers from the ferns and 

 other rank herbage late in the season. 



Molophilus soror, sp. no v. 



General coloration brownish gray; wings whitish, the costal margin con- 

 spicuously yellowish; a brown seam along vein Cui and a cloud on m-cu and the 

 basal section of Ms+i- 



Female. — Length 4-5 mm. ; wing 5-6 mm. 



Rostrum dark gray, the palpi black. Antennae short, brownish black, the 

 first segment pruinose; basal flagellar segments subcylindrical, passing into 

 elongate oval, the outer segments smaller. Head yellowish gray. 



Pronotum dark. Lateral pretergites narrowly whitish. Mesonotal praescu- 

 tum brownish gray, paler laterally ; humeral triangles usually a little brightened; 

 interspaces between the three usual stripes appearing as narrow darker brown 

 vittae; pseudosutural foveae elongate, transverse, black; scutum grayish brown, 

 the centers of the lobes somewhat darker; scutellum obscure fulvous; postnotum 

 grayish brown. Pleura dark gray. Halteres pale. Legs with the coxae dark, 

 pruinose, especially the fore coxae, the posterior coxae more reddish brown; 

 trochanters reddish brown; femora brownish yellow, the tips narrowly darker 

 brown; tibiae pale brown, the tips narrowly infuscated; tarsi dark brown. 

 Wings whitish, the costal margin and wing-base strongly yellowish; a brown 

 seam along vein Cu\, a brown cloud on m-cu and the basal section of Mz+t 



