528 PROCEEDINGS OF THE ACADEMY OF [Oct., 
into a slender cylindrical point, the outer or ventral margin with a 
few sharp, appressed teeth. 
RHABDOMASTIX Skuse. 
Rhabdomastix Skuse; Proceedings of the Linnsean Society of New South Wales, 
series 2, vol. 4, pp. 828, 829 (1889). 
Subgenus SACANDAGA Alexander. 
Rhabdomastix (Sacandaga) monticola sp. n. 
Coloration grayish black; wings whitish hyaline with an indistinct 
pale brown stigma; cross-vein r present but faint; cell Ri small; cell 
1st Mi elongate with the basal deflection of Cui inserted at about 
mid-length. 
Male. — -Length about 5.5 mm.; wing, 6 mm. 
Rostrum and palpi dark brownish black. Antennae black, the 
flagellar segments with a long, pale pubescence; flagellar segments 
narrowed, especially terminally. Head black with a sparse grayish 
bloom. 
Mesonotum black with a sparse grayish yellow pollen; tuberculate 
pits on the extreme cephalic margin of the sclerite. Pleura clearer 
gray. Halteres pale, the knobs enlarged, the stem a little darkened 
basally. Legs with the coxse black with a sparse gray bloom; tro- 
chanters brown; femora dark brown; tibiae yellowish brown, a little 
darkened at the base and more narrowly at the tips; tarsal seg- 
ment one and all except the tip of two yellowish bro^\ai; remainder 
of the tarsi dark brown. Wings subhyaline, the stigma fairly distinct, 
oval, pale brown; veins dark brown, Sc paler. Venation (Plate 
XXVII, fig. 41) with Rs elongate; cell R2 small, vein R2 being 
short, oblique; R3 arcuated; cross-vein r present but very indistinct, 
bisecting the stigma; cell 1st M2 rectangular, somewhat elongated, 
the veins issuing from it not elongated, divergent; basal deflection 
of Cui almost mid-length of cell 1st M2. 
Abdomen dark brownish black. 
Habitat. — Western America. 
Holotype, cf, Kokanee Mountain, British Columbia, altitude 
8,000 feet, August 11, 1903 (R. P. Currie). 
Paratopotypes, 3 cf 's. 
Type in the collection of the United States National Museum. 
This species was formerly determined as being R. (S.) caudata 
Lundbeck^ in the first part of this series, but additional material 
^ Diptera groenlandica, Vidensk. Meddel. fra den naturh. Foren., p. 267, 
PI. 6, fig. 18 (1898); as a Goniomyia, subgenus Empeda. 
