28 BULLETIN 31, UNITED STATES NATIONAL MUSEOI. 



Pipiza (Penium) albipilosa, n. sp. 



Habitat. — Pennsylvania ! 



$ , Length, 7°^™. Antennae black, the third joint more brownish, and 

 near the base, especially on the inner side, reddish ; in shape obtusely 

 pointed on the lower anterior part, snbcordate, only a little longer than 

 broad. Head and thorax shiniug black, with a greenish reflection, 

 wholly clothed with nearh' white, rather long pile, except just above 

 the insertion of the antennae where there is a small quantity of black 

 j)ile. Abdomen shining black, on the posterior part of the second and 

 third segments with narrow, more dark appearing cross-bands of short 

 black pile ; pile elsewhere light colored, shorter and less abundant than 

 on the thorax. Legs black, wholly with light colored pile ; front and 

 middle tibiae, except a brown ring in the middle, and the hind tibiae at 

 base and end, and all the tarsi, except the last two or three joints (which 

 are brown) luteous. Hind femora considerably thickened, the hind 

 metatarsi only slightly so. Wings hyaline on the basal part, distinctly 

 clouded with brownish across the middle, becoming less strong toward 

 the end and posterior ^art; stigma yellow ', outer anterior angle of the 

 first posterior cell acute, briefly petiolate, the cross-veins at outer part 

 of the first posterior and discal cells nearly parallel Avith the posterior 

 border of the wing ; posterior angle of first posterior cell obtuse, with a 

 stump of a vein. 



Two specimens from Mr. Eugene Keen, collected in Fairmount Park, 

 Philadelphia. 



Pipiza iiigripilosa. n. sp. 



Hahitnt. — Pennsylvania! 



$ . Length 5.5™"". Deep shining black, with black pile. Pile on the 

 posterior part of the vertical triangle ; the post-orbital cilia and the 

 pile of the eyes more brownish black, in some views brownish. Antennae 

 black, third joint brownish red, subcordate, scarcely twice as long as 

 wide. Pile in front of dorsum of thorax in some views more brownish. 

 Abdomen wholly with short erect black pile, except along the bor- 

 ders there may be a few light-colored hairs. Legs black, the tij) of the 

 femora, the front and middle tibiae, except a brownish ring, and the 

 base and tip of hind tibiae, and all the tarsi, except the brownish two 

 or three terminal joints, luteous; pile chiefly black, on the under side 

 of the hind femora more brownish or obscurely yellowish ; hind meta- 

 tarsi only a little thickened. Wings hyaline, first posterior cell short 

 petiolate, the angle acute; the cross-veins at outer part of the first pos- 

 terior and discal cells nearly parallel with the hind border of the wing ; 

 stigma yellowish. 



One specimen collected by Mr. Eugene Keen, in Fairmount Park, 

 Philadelphia. 



