200 ODYNERUS CRASSICORNIS. 



beautiful granular tubes, as entrances to its burrows, which are 

 frequently met with during the early part of summer on sand- 

 banks. 



Odynerus Icevipes and melanocephalus both burrow in dead 

 bramble- sticks, or in those of the rose; the former lines the 

 excavated tube with a coating of fine sand, and constructs the 

 divisions between the cells of the same material ; it stores up 

 small caterpillars, and is subject to the attacks of two species of 

 Ichneumon, Cryptus ornatus of Gravenhorst, and C. bellosus of 

 Curtis. 



Odynerus crassicornis is apparently the rarest species of the 

 genus. I once captured it burrowing in a hard sand-bank near 

 Darenth Wood, in Kent. Mr. Westwood observed this insect, 

 near Paris, conveying the larva? of Chrysomela Populi. 



Div. 1. Symmorphus, IVesm. The antenna simple in both sexes; 

 the first segment of the abdomen with a transverse 

 suture at its base above, bordered by an elevated ridge, 

 the segment funnel-shaped and subp etiolated, and having 

 a longitudinal impressed line above. 



1. Odynerus crassicornis. 



O. niger; metathorace rugoso, postice nitido; abdominis seg- 

 mentis quinque flavo-marginatis; capite thoraceque flavo- 

 variegatis. 



Vespa parietum, Fabr. Ent. Syst. ii. 265. 45 ; Syst. Piez. 261. 44. 



Schrank, Faun. Boic. ii. 253. 2208. 

 Odynerus parietum, Latr. Hist. Nat. Ins. xiii. 347. 



Spin. Ins. Liy. ii. 180. . 

 Vespa crassicornis, Panz. Faun. Germ. 53. 8. 



Schceff. Icon. Ins. Ratisb. t. 24. f. 3. 

 Vespa bipunctata, Villers, Ent. iii. 24. 

 Odynerus crassicornis, Wesm. Mon. Odyn. Belg. 39. 8. 

 " St. Farff. Hym.'u. 663. 41. 



Sauss. Mon. Guepes Sol. 123. 1, & Supp. 117. 79. 1. 10. f. 2 ? . 



Female. Length 5-6 lines. Black and punctured; the punctures 

 on the disk of the thorax shallow and distant ; the sides of the 

 metathorax and the post-scutellum rugose, the truncation of the 

 metathorax shining; the abdomen shining, the basal segment 

 strongly punctured, the rest delicately so. The clypeus emar- 

 ginate, forming at the lateral angles of the emargination a short 

 recurved tooth or spine. A large transverse macula at the base 

 of the clypeus, the scape of the antennae in front, and a narrow 



