CRABRO DIMIDIATUS. 125 



Crabro dimidiatus, Fabr.Ent.Syst. ii. 298.19 ? ; Syst.Piez. 313.24. 



Van d. Lind. Obs. ii. 58. 20 3 ? . 



Shuck. Foss. Hym. 151. 14. 



Dahlb. Hym. Europ. 345. 228. 

 Crabro serripes, Panz. Faun. Germ. 46. 8. 



Herr. Schajf. Cont. Faun. Germ. 179. 20. 



Wesm. Hym. Foss. Bely. 128. 1. 



Blepharipus pauperatus, St. barg. Ann. Soc. Ent. Fr. iii. 733. 5 ; 

 Hym. iii. 138. 5. 



Female. Length 4-6 lines. Black ; head smooth, shining, and 

 slightly pubescent ; a short carina between the posterior ocelli 

 and a longitudinal line in front of the anterior one, which runs 

 into the abrupt canaliculation of the face ; the anterior and 

 lateral margins of the vertex next the eyes elevated ; the scape 

 yellow, with a black stain behind ; the inner orbits and lower 

 portion of the cheeks and the clypeus covered with a dense 

 silvery pile ; the clypeus frequently more or less yellow at the 

 base, the centre with a longitudinal carina; the mandibles 

 yellow in the middle, with their apex rufo-piceous, the yellow 

 spot sometimes wanting. Thorax finely and thickly punctured ; 

 the mesothorax with a central impressed line extending to the 

 disk ; the scutellum frequently with a yellow dot on each side, 

 the post-scutellum usually yellow ; the metathorax with a 

 smooth shining subcordate space at its base, enclosed by a con- 

 sute incisure, and having a longitudinal impressed line in the 

 middle, which dilates beyond it into a fossulet ; the sides with 

 a hoary pubescence ; a transverse line on the collar yellow ; the 

 wings slightly coloured, the nervures and tegulae piceous ; the 

 base and apex of the intermediate and posterior coxae rufo- 

 piceous ; the apex of the trochanters and the tibiae yellow, the 

 latter with a black stain beneath ; the tarsi rufo-piceous, with 

 their basal joint yellow ; the anterior tarsi ciliated on the exte- 

 rior ; all the tibiae spinose. Abdomen elongate-lanceolate, with 

 five broad yellow bands variously interrupted, sometimes very 

 slightly so, the two apical segments yellow ; the band on the 

 third segment sometimes wanting. 



The Male has the antennae simple, slender, and the scape fim- 

 briated beneath, with a yellow line at the sides; the thorax 

 usually without yellow markings, but sometimes having a yellow 

 spot on each side of the collar ; the anterior femora rufo- 

 piceous at their base and within, the intermediate pair with a 

 testaceous streak inside and outside ; the anterior tibiae yellow 

 above, the intermediate on the exterior, and the posterior at 

 the knees and sometimes at the apex on the exterior, and the 

 tarsi, rufo-piceous ; the anterior femora compressed and dilated 



