404 HYMENOPTERA. 



in curve, and the mandibles not notched at the base ; but the 

 latter character is common to many species of other divisions of 

 the genus : an examination of a large number of species from 

 other countries shows that the former character is evanescent ; 

 the ocelli are disposed in every form between an angle and a 

 slight curve. 



54. Crabro bimaculatus. B.M. 



Crossocerus bimaculatus, St. Farg. Ann. Soc. Ent. Fr. iii. 788. 



25(?; Hym. iii. 191. 25. 

 Crabro geniculatus. Shuck. Foss. Hym. 169. 28. 

 Crabro bimaculatus, Dahlb. Hym. Eur op. i. 310. 190. 



Hab. Britain ; France ; Germany ; Austria. 



55. Crabro brevis. B.M. 



Crabro brevis, Van d. hind, Ohs. ii. 70. 32 <? $ . 



Shuck. Foss. Hym. 175. 33. 

 Lindenius brevis, St. Farg. Ann. Soc. Ent. Fr. iii. 800. 10; Hym. 



202. 10. 

 Entomognathus brevis, Dahlb. Hym. Europ. i. 295. 179. 



Wesm. Hym. Foss. Belg. 124. 1. 



Hab. Britain; France (Paris); Germany; Italy; Belgium; 

 Austria ; Sweden. 



This species only differs from the majority of the genus in 

 being of a shorter and more robust form, and in having 

 a deep notch, or rather an obtuse tooth, at the base of the man- 

 dibles ; these differences cannot be regarded as of more than 

 specific value. 



56. Crabro capitosus. B.M. 



Crabro capitosus, Shuck. Foss. Hym. 159. 20 $ . 



Dahlb. Hym. Europ. i. 317. 198 c? $ . 



Wesm. Hym. Foss. Belg. 129. 3. 

 Crabro leevipes, Herr. Schlijf. Faun. Germ. 179. 22. p. 43. 



Hab. Britain ; Germany ; Sweden. 



57. Crabro dimidiatus. B.M. 



Crabro dimidiatus, Fabr. Ent. Syst. ii. 298. 19 $ ; Syst. Piez. 

 313. 24. 



Van d. hind, Obs. ii. 58. 20 d^ $ . 

 Shuck. Foss. Hym. 151. 14. 

 Dahlb. Hym. Europ. i. 345. 228. 



