banks: new fossorial hymenoptera. 109 



border of pronotum, and slightly on sides of second abdominal seg- 

 ments; legs mostly yellow, coxae, mid tarsi, hind tibiae, and tarsi 

 darker, spurs pale. Slender; clypeus very broad, truncate, face 

 broad, wider above, vertex convex, pronotum arcuate behind, meta- 

 notum with a broad median groove, basal abdominal segment rather 

 broad; legs slender, inner spur of hind tibia about two thirds as long 

 as basitarsus. Wings nearly hyaline, not darker at tip, second sub- 

 marginal hardly longer than broad, third not longer and narrowed 

 above, recurrent veins received at middle of cells; basal vein strongly 

 bowed at base, and almost interstitial with the transverse; in the hind 

 wing the cubital fork arises much beyond cell. Length, 5 mm. 



Ageniella festina, sp. nov. 



Type — M. C. ZAQ,024. Va.: Falls Church, 6 August. Nathan 

 Banks. One specimen. 



d^ Black, with silvery pubescence, lower orbits and small spot 

 each side on clypeus yellow; tip of mandibles reddish; basal part of 

 abdomen reddish, tip white, front and mid spurs pale. Body slender, 

 face rather narrow, narrowed above, clypeus truncate, vertex convex; 

 pronotum with hind margin strongly arcuate; metanotum without 

 definite furrow, but rather depressed in middle area, densely white 

 pubescent, basal segment of abdomen slender at base, subpetiolate; 

 hind pair of legs very long, inner spur of hind tibiae about one half 

 the length of basitarsus; wings rather long, darkened throughout, 

 marginal cell acute, second submarginal much longer than broad, 

 third also elongate, narrowed above, recurrent veins received at middle 

 of cells, basal vein slightly bowed at base, only a little before the 

 transverse, in the hind wings the cubital fork arises a little beyond 

 the cell. Length, 8 mm. 



Ageniella fraternella, sp. nov. 



Type.— M. C. Z. 10,025. Va.: Falls Church, 14 July. Nathan 

 Banks. One specimen. 



cT" Black, basal half of abdomen reddish, white spot at tip, spurs 

 whitish, most noticeable on front pairs, wings nearly hyaline, tip not 

 darkened ; clothed with fine white pile ; clypeus very broad, truncate, 

 face barely narrowed above, vertex convex, pronotum arcuate behind, 



