524 PROCEEDINGS OF THE ACADEMY OF [Oct., 
and the base of Haclen Peak, Colorado, altitude 12,000 feet, August 
10, 1915 (Oslar). 
The wing is shown on Plate XXVI, fig. 31. 
The male hypopygium (Plate XXV, figs. 81, 82) with the pleurites 
moderately elongated, the dorsal angle produced caudad and slightly 
dorsad as an elongated fleshy lobe that is sparsely hairy, the hairs 
on the dorsal face strong, those on the inner face weak; ventral pleural 
appendage (y) very long, slender, beyond the base slightly expanded, 
the apical portion slender, slightly expanded toward the tip, dusky 
in color and provided with an abundance of long, delicate hairs; 
dorsal pleural appendage (d) a short, fleshy lobe whose caudal margin 
is produced into a powerful, curved, heavily chitinized hook, directed 
inward and dorsad; at the tip of the fleshy portion of the lobe are 
two stout hairs and a group of about eight smaller ones. Penis-guard 
pale in color, simple, slender, from an enlarged base, the apex split 
by a deep rounded notch. 
Gonomyia (Gonomyia) subcinerea Osten Sacken. 
Gonomyia subcinerea Osten Sacken; Proceedings of The Academv of Natural 
Sciences of Philadelphia, p. 231 (1859). 
This is apparently the commonest and most widely distributed 
species of the genus. It seems to be dimorphic or else there are two 
very closely allied forms that often occur together, one of which is 
sulphur-yellow and brown as described for this species, the other 
much more grayish and more restricted in its distribution than the 
typical form. 
Ontario, Kearney, July 27, 28, 1911 (M. C. Van Duzee); Ottawa, 
August 13, 1912. 
Quebec, Gatineau, July (Beaulieu); Aylmer, June (Beaulne). 
Maine, Aroostook County, Fort Kent, August 28, 1913 (Osborn) ; 
Piscataquis County, Mt. Katahdin, August 22, 1913 (Alexander); 
Penobscot County, Orono, June 8 to September 7, 1913 (Alexander) ; 
Hancock County, Ellsworth, July 10 to August 16, 1913 (Stanwood). 
Vermont, Windham County, Brattleboro, July 15, 1908 (Johnson). 
Massachusetts, Middlesex County, Riverside, August 9 (Johnson); 
Auburndale, August 16 (Johnson). 
Connecticut, Middlesex County, Middletown, June 16, 1909 
(Johnson); New Haven County, East River, July 3, 1910 (Ely). 
New York, Fulton County, , Sacandaga Park, June 1, 1914 
(Alexander); Gloversville, June 3, 1914 (Alexander); Herkimer 
County, Trenton Falls (Osten Sacken), the type-locality; Indian 
Castle, June 9 to 13, 1915 (Alexander); Onondaga County, Green 
