504 PROCEEDINGS OF THE ACADEMY OF [Oct., 
knobs brown. Legs with the coxse and trochanters dull yellow; 
femora brown, a little paler basally; tibiae and tarsi brown. Wings- 
subhyaline, stigma indistinct, veins pale brownish yellow. Venation 
(Plate IHj%g. 36) : Sc long, ending beyond the fork of the sector; Sct 
about four to six times as long as Sd; Rs long, gentlj^ arcuated; cross- 
vein r present, connecting with 7^2+3 at about one-third its length; 
R2. oblique (as in Gonomyia suhcinerea) ; cell 1st M2 closed; basal de- 
flection of Cui at about one-third to one-fourth the length of the cell. 
Abdomen brownish yellow, the sternites paler yellow. Male 
hypopygium (Plate XXXI. fig. 98) with the pleurites moderately 
slender, broader basally, bearing three appendages, the largest 
appendage (a) very elongate, digitif orm, with numerous long scattered 
hairs on raised tubercles, the apex a little flattened, blunt, this 
appendage decussate with its fellow of the opposite side; the two^ 
smaller appendages are slender, one (6) directed proximad, decussate, 
pale, the tip drawn out into a long point; the third appendage (c) 
slender, directed cephalad, slightly enlarged beyond the middle, the 
tip subacute. Penis-guard rectangular, on the ventral side running 
out into a sharp, median chitinized point. In a position of rest the 
large finger-like appendages lie parallel and are more or less approxi- 
mated, but not decussate, directed strongly ventrad. 
Females have the eyes smaller, the prsescutum more yellowish; 
ovipositor powerful, the valves elongate, upcurved toward the tips. 
Habitat. — Northeastern United States. 
Holotype, cf , Mountain Lake, Fulton County, New York, altitude 
1,600 feet, June 13, 1916 (Alexander). 
Allotype, 9 , Buell Mountain, Fulton County, New York, altitude 
1,800 feet, June 18, 1916. 
Paratopotypes, 2 cf 's, 35 9 's. 
Type in the collection of the author. 
The holotype occurred on rich vegetation along a small temporary 
stream flowing into the lake on June 13. Associated with the 
■species at this time were the following crane-flies: Dicranomyia 
puhipennis, Ormosia rubella, Erioptera {Empeda) stigmatica, Limno- 
phila toxoneura, L. areolata, L. nigripleura, L. brevifurca, L. rufibasis, 
L. Sylvia, Ulotnorpha pilosella, Rhaphidolabis (Rhaphidolabis) 
tenuipes, R. {Rhapidolabina) flaveola, R. {Plectromyia) modesta, 
Tricyphona vernalis, T. calcar, Dolichopeza americana, Oropeza venosa, 
Tipula senega, T. iroquois, and T. hermannia. 
The allotype and several of the paratypes occurred along a small 
temporary torrent pouring do^vn the eastern slopes of Buell Mountain 
