130 CRABRO TRANSVERSALIS. 



on the intermediate pair, and sometimes a yellow spot at their 

 apex beneath ; the tarsi piceous, with their basal joint pale ; 

 the calcaria yellow testaceous, and all the tibiae spinose. Abdo- 

 men subclavate, shining, and subpubescent, the margins of the 

 segments sometimes piceous. 



The Male only differs in having the antennae nmbriated beneath, 

 and in having a yellow spot on the scutellum ; the anterior 

 femora yellow above and behind, testaceous in front and 

 black beneath, their tibiae black beneath ; the intermediate 

 femora with a yellow stripe above and in front, and their tibiae 

 with merely a black stain behind ; the anterior and inter- 

 mediate tarsi with their terminal joint piceous, and a piceous 

 spot on the basal joint of the anterior ones ; the posterior legs 

 like the female ; the abdomen longer and narrower. 



This species is not uncommon ; it occurs about London, and 

 in many other localities. I have captured it conveying gnats to 

 its burrow, in a bank of very hard fine sand, near Gravesend. 

 Wesmael thinks the female described belongs to C. palmipes ; 

 but, according to his own showing, in this he is certainly mis- 

 taken, as in all the specimens which I have seen (some from 

 Shuckard himself included), the anterior calcaria are pale yellow, 

 not black, as in C. palmipes ; but this is not pointed out in 

 Shuckard's Essay. 



8. Crabro transversalis. 

 C. niger, elongatus ; metathorace antice transverse striato. 



Crabro transversalis, Shuck. Foss. Hym. 162. 22. 

 Dahlb. Hym. Europ. i. 317. 197. 



Male. Length 2i lines. Black ; thickly punctured ; a longi- 

 tudinal impressed line between the posterior stemmata, passing 

 a little beyond them ; another in front of the anterior stem in a, 

 extending to the face, which is canaliculated, smooth, and 

 shining; the antennae with the scape fulvous at the side, and the 

 clavolet nmbriated beneath ; the inner orbit of the eyes and the 

 clypeus (which is carinated in the centre and tridentate in front) 

 covered with a dense silvery pubescence ; the mandibles of a 

 testaceous yellow, with their apex rufescent. The thorax 

 thickly punctured ; the metathorax with a cruciform consute 

 incisure, the longitudinal one widest at the base of the meta- 

 thorax, narrowing towards the centre, just beyond which it 

 dilates into a broad fossulet, the transverse one bending upwards 

 and enclosing its anterior portion, which, as well as the pos- 

 terior, is transversely striated ; the collar with two small pale 



