524 PROCEEDINGS OF THE ACADEMY OF [Oct., 



and the base of Haden 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 (v) 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 Academy 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 (Stan wood). 



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 



