1916.] NATURAL SCIENCES OF PHILADELPHIA. 525 
Lake, June 8, 1915 (Alexander); Tompkins County, Ithaca, May 13 
to August 7, 1910; Albany County, Albany, June 2G, 1912 (Young); 
Helderberg Mountains, June 12, 1915 (Alexander) ; Rockland County, 
West Nyack, June 15, 1912 (W. Sheffield); Westchester County, 
Tarryto^vn, June 9, 1914 (Frost). 
New Jersey, Bergen County, Ridgewood, July, 1911 (Leonard); 
Mercer County, Princeton, June 18, 1915 (Alexander). 
Maryland, Montgomery County, Forest Glen, July 6, 1914 
(McAtee); Plummers Island, May 26, 1914 (Shannon). 
District of Columbia, Washington (Osten Sacken) ; the type-locality. 
Virginia, Alexandria County, Rosslyn, May 11, 1913 (Knab); 
Fairfax County, Four-mile Run, July 13, 1912 (Knab). 
North Carolina, Buncombe County, Black Mountains, June 
13, 1912 (Beutenmuller) ; Jones County, Pollocksville, July 8, 1915 
(Alexander) . 
Michigan, Walnut Lake, June 26-28, 1907 (Needham). 
Saskatchewan, Farewell Creek, September (Mrs. V. A. Anthony). 
Missouri, St. Louis County, West St. Louis, May 12, 1914 (W. V. 
Warner) . 
Kansas, Pottawatomie County, Onaga (Crevecoeur). 
Montana, Beaver Creek, altitude 6,300 feet; August, 1913 (Hunter). 
The wing is shown on Plate XXVI, fig. 33. 
The male hypopygium (Plate XXVI, figs. 83-85) mth the ninth 
pleurite elongate, rather slender, the dorso-lateral angle produced 
caudad in a slender, fleshy lobe that is provided with numerous long 
hairs; ventral pleural appendage (v) a long, slender, pale brown 
lobe that is almost straight, slightly expanded toward the blunt 
apex, provided with numerous setigerous punctures; dorsal pleural 
appendage (d) two-lobed, the caudal lobe a powerful, heavily chitin- 
ized, curved spine that is directed cephalad at its tip, provided with 
two or three small, acute denticles before the apex; the ventral arm 
is again bifid, the caudal portion a sharp, chitinized, feel^ly curved 
spine, the cephalic portion a small, subfleshy lobe with several hairs 
and short spines. Penis-guard very elongate, pale, narrowed at the 
apex, at the base on either side with a subtending, slender, subchi- 
tinized rod that is more or less flexible. 
Gonomyia obscura Doane^ is unrecognizable; the type in the National 
Museum is a broken female that is close to subcinerea, although its 
8 Journal of the New York Entomological Society, vol. 8, p. 192, PI. 8, fig. 7 
(1900), described as a Phyllolabis. 
