506 PROCEEDINGS OF THE ACADEMY OF [Oct., 



produced into a sharp point. Hypopygium quite as in pubipennis, 

 but the ventral hook is more blackened, chitinized, and the point is 

 longer, more slender; dorsal hook more slender, not so blackened, 

 the sharp point on the proximo-lateral angle not so long. 



The female has the antennae much longer than in this sex of pubi- 

 pennis, the flagellar segments dark brown, not yellowish, the terminal 

 segments darkened; flagellar segments elongate-oval instead of merely 

 oval; wings (Plate XXVII, fig. 37) with the anterior margin and 

 apex with a fringe of reddish brown to dark brown hairs, not bright 

 yellow as in pubipennis. 



Habitat. — Northeastern United States. 



Holotype, & , Mountain Lake, Fulton County, New York, altitude 

 1,600 feet, July 7, 1916 (Alexander). 



Allotype, 9 , with the type. 



Paratopotypes, 15 cf 9 's; paratypes, 1 d", Taylor, Cortland 

 County, New York, altitude 1,200 feet, July 20, 1916, 2 cf's, near 

 Cincinnatus, Chenango County, New York, altitude 1,300 feet, 

 July 21, 1916. 



Type in the collection of the author. 



A large striking species, the largest yet discovered in the eastern 

 States. 



The types occurred on rich vegetation along a small temporary 

 stream flowing into the lake. This is the same locality described 

 under Erioptera nyctops, but by this date (July 7) the stream had 

 disappeared and the mid-summer crane-fly fauna was quite different 

 from that found less than four weeks before. The principal species 

 recorded now were the following: Dicranomyia immodesta, D. 

 pubipennis, D. macateei, Elephantomyia westwoodi, Erioptera chryso- 

 coma, E. chlorophylla, E. armillaris, E. armata, E. caloptera, E. 

 stigmatica, Molophilus pubipennis, M. ursinus, Lininopkila fusco- 

 varia, L. quadrata, Bittacomorpha jonesi, etc. 

 Molophilus nova-oaesariensis sp. n. 



Size small (wing under 3.2 mm.); coloration dark brownish black; 

 wings dusky with the fusion between Cu x and M 3 slight ; hypopygium 

 of the male with the ventral appendages straight, slender, heavily 

 chitinized. 



Male. — Length about 2.7 mm.; wing, 2.8 mm. 



Rostrum and palpi blackish. Antennae rather elongated, dark 

 brown, the flagellar segments cylindrical with an abundant long 

 pale pubescence. Head dark gray. 



Mesonotum black with a sparse grayish bloom ; pleura dark brown- 



