1916.] NATURAL SCIENCES OF PHILADELPHIA. 517 
The male hypopygium (Plate XXIX, fig. 63) with the pleurites 
very elongated, broader at the ])ase, tapering to the obliquely trun- 
cated apex which bears on the inner side a single appentlage shaped 
as a curved hook, bent proximad, dorsad and finally cephalad, the 
apex acute and strongly chitinized. Anal tube broad, pale, bifid 
by a deep median notch, the adjacent lobes rounded. Penis-guard 
(p.gd.) very elongate, slender, tapering gradually to the acute apex,, 
at the base on the ventral side with an oval fleshy lobe covered 
with setigerous punctures on the ventral face. 
Gonomyia (Leiponeura) manca Osten Sacken. 
Gonomyia manca Osten Sacken; Monographs of the Diptera of North 
America, part 4, pp. 178, 179 (1869). 
A rather A\ide-ranging species throughout the eastern United 
States: 
New York, Fulton County, Sacandaga Park, August 26, 1916 
(Alexander) . 
New Jersey, Essex County, South Orange, June 30, 1868 (Osten 
Sacken); the type-locality. 
Maryland, Montgomery County, Forest Glen, June 1, 1913^ 
(Knab); Plummers Island, August 18, 1912 (Viereck). 
District of Columbia, Washington (Coquillett's types of Dicratiomyia 
curvivena) . 
Virginia, Fairfax County, Great Falls, August 23, 1908 (Knab); 
Difficult Run, July 25, 1915 (McAtee and Alexander); Glencarlyn, 
May 28 (Banks). 
North Carolina, Jones County, Pollocksville, July 8, 1915 
(Alexander); Onslow County, Camp Perry, July 9, 1915 (Alexander); 
Buncombe County, Black Mountains, June 24, 1912 (Beutenmuller). 
South Carolina, Charleston County, McClellanville, August 8,. 
1915 (Alexander). 
Georgia, Decatur County, Bainbridge, September, October, 1910 
(Bradley) . 
The wing is sho^ra on Plate XXYI, fig. 22. 
The male hypopygium is of the type of G. puer Alexander, G. inermis 
Alexander et al. It is shown on Plate XXIX, figs. 64, 65; the pleu- 
rites are exceedingly elongated, slender, tapering to the narrow apex, 
the outer face with many long hairs, on the inner face at the apex 
with a strong bristle; pleurites in a position of rest, decussate. Penis- 
guard {p.gd.) long and slender, acute, tapering to an acute point, 
subtended on either side by a flattened blade, ending in a triangular 
black hook that is bent slightly dorsad at the apex. 
