126 CRABHO SIGNATUS. 



behind, their tibiae dilated angularly behind about the middle, 

 and irregularly coneave beneath ; the intermediate femora con- 

 cave beneath, and their tibiae excised irregularly on the exterior 

 with a pale dilatation extending along their margin ; the pos- 

 terior coxae with a spine towards their base below, and the 

 femora slightly flattened within ; their tibiae clavate ; the abdo- 

 men less coloured with yellow than the female, sometimes with 

 merely a hand on the first segment and two dots on the 

 second, a widely interrupted band on the third, a spot on the 

 fourth, and a spot or two in the middle of the sixth ; the anus 

 flavo-ferruginous. 



This species does not occur near London, but has been taken 

 in Kent and Surrey. In the North it is very plentiful. In July 

 1852 I found it in abundance near Wakefield in Yorkshire. 



4. Crabro signatus. 



C. niger; thorace maculato; scutello bipunctato ; abdomine 



segmentis tribus ultimis flavis. 



Crabro signatus, Panz. Faun. Germ. 55. 15 ? . 

 Herr. Schaff. Faun. Germ. 179. 22. 43. 

 Jf'esm. Hym. Foss. Belg. 128. 2. 



Female. Length 5-6 lines. — Black; head smooth and shining; 

 the vertex with a depression on each side of the ocelli, which is 

 divided by an oblique longitudinal carina ; the scape yellow ; 

 the elypeus covered with silvery pubescence; the mandibles 

 yellow, with the apex fuscous. Thorax : an interrupted line 

 on the collar, the tubercles and post-scutellum, yellow, with 

 two yellow spots on the seutellum ; legs yellow, with their base 

 and apex more or less black. Abdomen petiolated, the petiole 

 with a black lanceolate stripe above; the second segment black, 

 with a yellow macula on each side posteriorly ; the third seg- 

 ment black at the base, the rest yellow. 



Male. Length 4 lines. — Black ; very smooth and shining, im- 

 punctate ; the vertex with irregular depressions ; the inner orbit 

 of the eyes and the elypeus covered with silvery pubescence ; 

 the scape and mandibles yellow ; the apex of the latter ferru- 

 ginous, the palpi pale testaceous. Thorax : an interrupted line 

 on the collar ; the legs yellow ; the posterior coxae and tibiae 

 black — not the trochanters ; the posterior tibiae with a minute 

 tooth at their base beneath ; the intermediate femora have a 

 black line above and beneath ; all the tibiae without spines ; 

 the apical joints of the tarsi rufo-piceous ; wings hyaline and 

 iridescent. Abdomen petiolated, with a yellow spot on each 



