Fossorlal Uymenoptera of Nortli America. G7 



tinuous forming; that triangular region peculiar to the Crabrones. In 

 Bfepharipus, the front is still rather narrower. 



There is but slight variation in the clypeal region. In Anacrahro the 

 portion covered with pubescence is short, and has the appearance of being 

 deeply indented in the middle, since the front edge is thickened, and full, 

 naked, and there is no perceptible ridge above. In Blepharipus it is 

 much longer and ridged distinctly, and in Crahro it is much produced in 

 front and somewhat pointed; in the other genera it varies very slightly. 

 In the antennae of our genera there is but little difference. In Ana- 

 crahro they are shortest and thickest. In the more typical species of 

 Thyreoput they are flattened, and the second joint shorter than usual 

 aud flattened, in the other aberrent species, the antennae are long and 

 slender cylindrical. 



ANACRABRO, nov. gen. 



Body short and flattened, thorax globular, short, head and thorax 

 together equalling in length the flattened short abdomen, which is 

 concave beneath. 



Head very short, being (in a transverse sense) elliptical oblong, 

 much less than one-half as long as broad, since the hinder region 

 posterior to the eyes, is not developed as usual in this subfamily. 

 Eyes broad, truncated above and regularly rounded below the ocelli; 

 the triangular front very small and short, rapidly narrowing towards 

 the antennal groove. Clypeus very short, appearing broadly indented 

 in front, the front margin rounded and naked in front where it is sud- 

 denly deflexed, presenting a triangular squarely truncated face. An- 

 tennae much as usual in the subfamily, thickening a little towards the 

 tip, joints unusually cylindrical and equal, second joint hardlylonger 

 than the others. Ocelli placed in a low triangle. Palpi and lingua shorter 

 and thicker than usual. 



Thorax not much longer than broad, subglobose. Meso-scutum 

 shorter than broad ; flanks of the meso-thorax square in front, the sides 

 being straight and suddenly deflexed beneath. 



Wings shorter and broader than usual, pterostigma large and dis- 

 tinct; second costal space large; first median much shorter than usual; 

 costal and submedian recurrents not opposite each other, the sub- 

 median being placed much nearer the base of the wing than the costal 

 recurrent; median newure joining the first subcostal within the mid- 

 dle of the space, (in Crahro the juncture takes place at the outer end 

 of the space.) 



Legs not so stout as usual, joints simple, hardly dilated as much as 



