HYMENOPTERA. 423 



enclosed by a sharp ridge, in the centre of which are two longi- 

 tudinal carinse ; on each side it is striated ; the sides coarsely 

 rugose, behind transversely striated; the wings fusco-hyaline, 

 with a violet iridescence, the uervures rufo-fuscous ; the anterior 

 tibiae ferruginous within; the posterior femora with a yellow 

 stripe above, and the tibiae with a stripe outside. Abdomen 

 shining, the first segment with a yellow band in the middle 

 which emits a quadrate spot in front and has two deep notches 

 behind; the second, third, fourth and fifth segments with a 

 yellow fascia at their basal margins, which are narrowed in the 

 middle ; beneath, the second and third segments have a yellow 

 spot on each side. 



Hab. India. (Coll. W. W. Saunders, Esq.) 



146. Crabro argentatus. 



Lindenius argentatus, St. Farg. Ann. Soc. Ent. Fr. iii. 792. 1 ; 

 Hyyn. iii. 194. 1. 



Dahlb. Hym. Europ. 300. 182. 



Hab. India. 



147. Crabro semipunctatus. 



Crabro semipunctatus, St. Farg. Ann. Soc. Ent. Fr. iii. 711. 13 $ ; 

 Hym. iii. 115. 13. 



Dahlb. Hym. Europ. i. 386. 258. 



Hab. Rio Janeiro. 



148. Crabro opulentus. B.M. 



Female. Length 4 lines.— Black : the head closely punctured, 

 the ocelh in a curve ; the face, above the insertion of the an- 

 tennae, with a changeable golden pile ; a similar lustre on the 

 vertex behind the eyes; that on the lower portion of the cheeks, 

 base of the mandibles, clypeus, and inner orbit of the eyes, is 

 dense, bright and silvery ; the scape yellow. Thorax : the meso- 

 thorax covered with large confluent punctiu-es; the scutellum 

 with distinct separated punctures ; the mesothorax has a central 

 carina, and on each side of it a much more elevated one, all 

 extending from the base to the disk ; the metathorax with a deep 

 longitudinal central channel, and a half-circular sub-enclosed 

 space at its base, which is obliquely and very coarsely grooved ; 

 on each side of the enclosure it is coarsely sculptured ; the pos- 

 terior i)ortion of the metathorax coarsely rugose, the lateral 

 margins raised ; the collar, tubercles, a spot beneath the wings, 

 a double spot at the anterior lateral angles of the scutellum, and 

 the post-scutellura, yellow ; u spot at the apex of the anterior 



U 



