276 THE CANADIAN ENTOMOLOGIST, 



Clypeus shining, coarsely puncto-striate, sulcate ; abdomen shining, 

 rather coarsely punctured, fasciae often obscured by moisture ] 

 nervures dark ; malar space about one-third as long as 

 wide eulophi. 



8. Prothorax with strong lateral spines ; pubescence above mixed with 



black ; segment i distinctly punctured, extreme sides fasciate, 2 

 fasciate at base and apex ; scutel puncto-striate ; malar space 



short armatus. 



Prothorax without strong lateral spines ; pubescence of thorax above 

 not mixed with black g. 



9. Segment 2 rather coarsely punctured ; fasciae narrow ; cell IIIj 



narrowed about one-half above ; claws cleft, the divisions nearly 

 equal aestivalis. 



Segment 2 minutely punctured, or impunctate ; fasciae broad ; cell 

 III5 not so strongly narrowed above 10. 



10. Wings whitish; pubescence white ; inner claw tooth 



subapical . , albescens. 



Wings yellowish ; inner claw tooth median; hiiid spur more distinctly 

 pectinate 11. 



11. Pubescence ochraceous; cell Ills little longer than III^. .Americanus. 

 Pubescence whitish ; cell III5 longer than III4 ; sp. nov , .• . . .similis. 



Males. 



Antennae long, joints much longer than wide 4. 



Antennas short, joints shorter, or hardly longer, than wide i . 



1. Joint 3 longer than 5; labrum bituberculate ; clypeus convex; 



pubescence pale ; malar space linear ; 8 mm brevicornis. 



Joint 3 not longer than 5 2. 



2. Posterior face of metathorax coarsely, closely, distinctly punctured ; 



abdomen coarsely punctured ; labrum with median fovea ; joints of 

 antennae a little longer than wide ; flagellum beneath, tarsi, tibiie 

 more or less and their spurs, testaceous ; malar space linear ; 



1 1 mm Robertsonii. 



Posterior face of metathorax shining, reticulated, impunctate ; 

 abdomen rather finely punctured ; malar space more than one-third 

 as long as wide 3- 



