1916.] NATURAL SCIENCES OF PHILADELPHIA. 523 



The Galactoptera Group. 



Gonomyia (Gonomyia) galactoptera Bergroth. 



Gonoim/iu <ial<tctoptcra Bergroth; Wiener Entomologische Zeitung, vol. 7, 

 p. 196 (1888). 



This fly is still known only from the type-locality, Sitka, Alaska. 



It is the only New World species of this genus that I have not seen. 



The Noveboracensis Group. 



Gonomyia (.Gonomyia) noveboracensis Alexander. 



Gonomyia noveboracensis Alexander; Canadian Entomologist, vol. 48, pp. 

 319, 320 (1916). 



A fly of local distribution in the northeastern United States: 



New York, Fulton County, Sport Island, Sacandaga River, June 

 11, 1914 (Alexander), the type-locality. 



The wing is shown on Plate XXVI, fig. 30. 



The male hypopygium (Plate XXX, figs. 79, 80) with the pleurites 

 prominent, elongate, with the dorsal inner edge with a prominent 

 tubercle bearing several hairs, ventral inner edge with a row of large 

 setigerous tubercles; pleurites bearing three small appendages, a 

 small inner dorsal cylindrical appendage (a) directed cephalad, 

 slightly enlarged basally, at the apex bearing three or four prominent 

 hairs; a dorsal apical appendage (b) directed proximad, flattened, 

 enlarged at the apex which bears a row of delicate hairs; a slender, 

 subchitinized ventral apical appendage (c) directed proximad, 

 slightly toothed at the tip and on the lower side just before the tip. 

 Gonapophyses and the penis-guard (Plate XXX, fig. 80) fused into a 

 very large, prominent, cylindrical tube armed with chitinized horns 

 and fleshy lobes; dorsal surface of the tube with two subpendulous 

 fleshy lobes, approximated on the median line, densely provided with 

 short, pale hairs; horns of the cylinder directed caudad and slightly 

 ventrad; outermost horns (a) very broad at the base, tapering to the 

 acute apex which is curved proximad; the next inner pair (b) slender, 

 chitinized, bifid at the apex; innermost pair (c) longest, slender, 

 slightly twisted, narrowed toward the apex. Ninth tergite with a 

 broad, rounded median concavity. Ninth sternite with a broad 

 V-shaped median notch, the adjacent angles produced caudo-laterad 

 as fleshy lobes provided with numerous setigerous punctures. 



The Subcinerea Group. 



Gonomyia i.Gonomyia^ filicauda Alexander. 



Gonomyia filicauda Alexander; Canadian Entomologist, vol. 48, pp. 320, 321 

 (1916). 



Still known only from the type-locality, Webster, near Platte 



Canon, Colorado, altitude 9,500 feet, August 24 to 26, 1915 (Oslar), 



35 



