banks: new fossorial hymenoptera. 99 



almost angulate behind; metanotum short, bilobed at base, the 

 posterior face forming a large pit, the lateral angles projecting behind 

 into a stout tooth. Abdomen slightly compressed; entire body 

 devoid of hairs. Legs moderately slender, without spines, except 

 minute ones at tips of tarsal joints below, inner spur of hind tibia 

 about two thirds of the basitarsus. Wings uniformally blackish; 

 basal vein interstitial, marginal cell acute, second submarginal slightly 

 longer than Ijroad, third barely longer, slightly narrowed above, first 

 recurrent near end of cell, second near middle; in hind wings the 

 cubital fork arises beyond the cell. Length 8 to 9.5 mm. 



Planiceps compressus, sp. nov. 



Type. — M. C. Z. 10,007. \'a.: Alexandria Co., near Court House. 

 Nathan Banks. One specimen. 



9 Similar in structure to P. niger, but larger, more plainly clothed 

 throughout with dense russety pollen, and the abdomen beyond 

 middle much more compressed. Venation about the same, but the 

 second submarginal cell is hardly as long, and the second discoidal 

 also shorter. Wings deep black throughout. The antennae are 

 longer, the third, fourth, fifth, etc. joints being plainly proportionally 

 longer than those joints in P. niger. The front margin of the clypeus 

 is truncate, almost slightly concave (faintly convex in P. niger). 

 Length 14 mm. 



Planiceps iiirsutus, sp. nov. 



Tifpc.— M. C. Z. 10,008. Calif.^ Pasadena, August. One speci- 

 men. 



9 Deep bluish, iridescent, rather purplish at tip of abdomen, head 

 greenish in front; antennae and legs mostly black; wings black, 

 deeply purplish iridescent. Head flat, more narrow than in P. niger, 

 eyes reaching up to vertex, from in front vertex is straight across or 

 almost concave; ocelli small; antennae short, second and third 

 joints together not as long as the first; dypeal margin slightly 

 rounded. Pronotum long, plainly longer than broad, rest of thorax 

 and abdomen slender; metanotum without median groove. Legs 

 stout, front pair short, hind tibia with inner spur equal to one half 

 the basitarsus. Wings rather short; basal vein strcyigly convex, 

 interstitial with cubital cross-vein; third discoidal cell very short, 

 second recurrent ending a little beyond second submarginal cell. 



