THE CANADIAN ENTOMOLOGIST 25 
Holctype, cf, Woodworth's Lake, Fulton Co., New York; 
altitude 1,600 feet; August 13, 1910 (Alexander). 
Allotype, 9 , with the type. 
ParaU polypes, lOcT 9 . 
Ormosia tnesccera, sp. n. 
Related to 0. movticola O. S.; antennae shorter and the flagellar 
scgnerts net so greatly attenuated ; wings more nearly hyaline. 
Male. — Length 3.7-3.8 mm.; wing 4.4-4.8 mm. 
Rostrum and palpi dark brown. Antenna dark brown; seg- 
ments only moderately elongated, not greatly attenuated as in 
movticola; each flagellar segment with a slight, apical, narrowed 
stem that is equal to about one-half the basal swelling; each seg- 
ment with abundant rather short hairs and verticils. Head dark 
bro'w n. 
Pronotal scutellum dull, light yellow. Mesonotum reddish 
with a sparse, gray bloom; thoracic stripes indistinct. Pleura 
pale brown, very sparsely gray pruinose. Halteres short, the 
knobs large, pale brown. Legs with the coxa? and trochanters pale 
yellowish brown; femora dark brown, paler basally; tibiae and tarsi 
brcwn. Wings pale grayish subhyaline, the costal region and 
stigma m.ore brownish; veins dark brow^n. Venation: cell 1st Mz 
open ; anal veins slightly convergent. 
Abdomen dark brown, the hypopygium a little more reddish. 
Hypopygium with the pleural appendages short, blunt, slightly 
curved. 
Habitat. — Northeastern United States. 
Holotype, cf, Simmon's Woods, Gloversville, Fulton Co., New 
York; altitude 900 feet; June 22, 1916 (Alexander). 
Parotopotype, cf. 
Related to 0. monticola O. S. (Mon. Dipt. N. Am., pt. 4, pp. 
145, 146; 1869), but the antennal segments much shorter, the in- 
dividual segments of the flagelhim not greatly attenuated and with 
the hairs and verticils shorter; no indication of the paler apices to 
the flagellar segments, and the hypopygial details different. 
O. monticola is a late summer species, most abundant in 
August; 0. mesocera appears to be more vernal in its appearance 
en the wing. 
