1916.] NATURAL SCIENCES OF PHILADELPHIA. 517 



The male hypopygium (Plato XXIX, fig. 63) with the pleurites 

 very elongated, broader at the base, tapering to the obliquely trun- 

 cated apex which bears on the inner side a single appendage 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 (Xeiponeura) manca Osten Saeken. 



Gonomyia manca Osten Saeken; Monographs of the Diptera of North 

 America, part 4, pp. 178, 17H ( lst>9). 



A rather wide-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 

 Saeken); 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 Dicranomyia 

 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 shown on Plate XXVI, fig. 22. 



The male hypopygium is of the type of G. puer Alexander. G. incrmis 

 Alexander et at. 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 

 wit h a st tong 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 slight ly dorsad at the apex. 



