280 Mr. E. Saunders' Sijno2ms of British 



Crabro vcstitus, Sm. Brit. Foss. Hym. j). 131, I can 

 find no trace of in his collection, and it is omitted in his 

 Catalogue of 1871 ; I have therefore omitted it, pre- 

 suming it to he identical with some other species. 



CEABEO. 



(■i) 1. Body petiolated ; 1st segment terminatiug in a 



node. 

 (•"]) 3. Face with a blunt spine between the antennae ; 



ajiex of the tibite red . . . . . . . . tibialis. 



(2) 3. Face without a spine ; apex of tibia? black . . clavipes. 

 (1) 4. I'etiole of body, if present, very short; 1st seg- 

 ment not terminating in a node. 

 (50) 5. Abdomen not strongly punctured. 

 (41) (i. OcelU in an equilateral triangle. 

 (40) 7. Cheeks beneath without a strong spine. 

 (33) .s. Abdomen entirely black. 



{'22) 0. Last segment of abdomen in ^ not more strongly 

 punctured than the preceding, excavated in 

 the 5 . 



(17) 10. Basal area of the metathorax not clearly defined. 



(12) 11. Posterior tibiae very clavate and rounded, with- 



out spines or teeth . . . . . . . . cajjitosas. 



(11) 12. Posterior tibis more or less dentate or spinose. 

 (16) 13. Metathorax with a wide central channel, whicli 



is distinctly margined; front legs of the ^ 



simple. 

 (15) 14. Legs entirely black . . . . . . . . leucostoma. 



(14) 15. Front legs testaceous-brown . . . . . . pubescens. 



(13) 10. Metathorax with a simjile. narrow, central im- 



pressed line; front legs of ^ scutate.. .. cetratus. 



(10) 17. Basal area of metathorax clearly defined. 



(19) 18. Puncturation of thorax so fine and indistinct 



as to be scarcely \isible, except with a high 



power . . . . . . . . . . . . yodugricus. 



(18) 19. Puncturation of thorax distinct. 



(21) 20. Clypeus black; front legs of ^ scutate .. goncKjer. 



(20) 21. Clypeus tlavous ; front legs of ^ simjile . . Ajthidum. 

 (9) 22. Last segment of the body in the ^ more strongly 



punctured than the preceding; not excavated 

 in the J . 



(26) 23. Fi'ont legs of ^ scutate, both sexes with the 

 calcaria of front legs black, or with the clypeus 

 and mandibles yellow. 



(25) 24. Larger, basal area of metathorax large, shining, 

 and finely strigose: ^ tibial scutate; clypeus 

 and mandibles yellow .. .. .. .. palmuriun 



(24) 25. Smaller, basal area of metathorax small, dull, 

 and very coarsely striate ; ^ tibias simple ; 1st 

 joint of tarsi scutate; calcaria in both sexes 

 black . . . . . . . . . . . . palmlpes. 



(23) 20. Calcaria of front legs pale ; clypeus nut yellow. 



