146 CRABRO SEXCINCTUS. 



This a scarce species; it has been taken in the London district; 

 it also occurred at Weybridge, at Bristol, and near Lannercost, in 

 Northumberland. I was inclined to think the female was the 

 C.podagricus of Dahlbom, not of Van d. Linden the melanarius 

 of Wesmael ; but on receiving subsequently the other sex from 

 Mr. Bold, I discovered the species to be the C. cetratus of 

 Shuckard. 



**** Antennce of the males with joints emarginate beneath; their 

 tarsi simple. 



24. Crabro sexcinctus. 



C. niger, flavo-maculatus ; metathoracis basi rugoso ; antennarum 

 articulis subtus emarginatis ; clypeo argentato. Mas. 



Crabro sexcinctus, Fan d. Lind. Obs. ii. 55. 13 (nee $ ). 

 Herr. Schaff. Faun. Germ. 181. 18. 

 Shuck. Foss. Hym. 137. 8. 

 Wesm. Hym. Foss. Belg. 154. 34. 



Male. Length 5 lines. Black ; head subquadrate, pubescent, 

 finely and closely punctured, the vertex concave between the 

 eyes ; between the ocelli is a slightly impressed line, which ex- 

 tends nearly to the posterior margin of the vertex ; the face 

 canaliculated, smooth and shining; the scape yellow, with a 

 black stain behind ; the first, second, third and fourth joints of 

 the flagellum emarginate beneath, produced into teeth at their 

 apex, the flagellum fulvous beneath, one or two of the apical 

 joints entirely so, the apical one black ; the inner orbit of the 

 eyes, the cheeks, and the clypeus, densely covered with silvery 

 down, the latter carinated in the centre and terminating in 

 front in an obtuse tooth. Thorax pubescent ; the mesothorax 

 with a central longitudinal carina, and, as well as the scutellum, 

 longitudinally rugose ; the metathorax rugose at the base and 

 transversely striated behind ; a deep groove runs down the 

 centre, its margins ridged, about the middle it turns off on each 

 side and curves round, enclosing a lobe ; the collar has some- 

 times an interrupted yellow band; the wings coloured, darkest 

 towards their apical margins ; the tegulae testaceous, the ner- 

 vures piceous; the anterior femora ferruginous above and in 

 front, and yellow beneath, their tibiae yellow above and in front, 

 which is slightly ferruginous at the apex; the intermediate 

 femora with a ferruginous line above, their tibiae yellow in front 

 and slightly ferruginous beneath ; the tibiae yellow and ferru- 

 ginous behind, with a black stripe ; the anterior and interme- 

 diate tarsi reddish yellow, with the apical joint fuscous ; the 



