22 CRABRO CLAVIPES. 



** Antennae of the males simple. Anterior tibiic simple, 

 their tarsi dilated. 



29. Crabro palmipes. 30. C. clypeatus. 



Div. 5. Abdomen subscssile. Ocelli in a curve. 



* Antennae of the males with two or more joints emarginate 

 beneath ; their tarsi simple. 



31. Crabro vagus. 32. C. chrysostomus. 



** Antennae of tbe males simple, their tarsi simple. 



33. Crabro Lindenius. 34. C. albilabris. 35. C. Panzeri. 

 36. C. brevis. 



A. — Div. 1. Abdomen petiolated. Ocelli in an equilateral tri- 

 angle. Antenna and tarsi simjile. (Sp. 1, 2.) 



1. Crabro clavipes. 



C. niger; abdomine rufo-picto, primo segmento nodoso; tibi- 

 arum posticaruin apice nigro. 



Sphex clavipes, Linn. Faun. Suec. 411. 1649; Syst. Nat. i. 94. 2. 8; 



& Cab. Mus. Linn. Soc. $ . 

 Crabro crassipes, Fair. Ent. Syst. Supp. 270. 26-7. 

 Pemphredon crassipes, Fabr. Syst. Piez. 315. 3 J . 

 Crabro rufiventris, Panz. Faun. Germ. 72. 12. 

 Van d. Lind. Obs. ii. 72. 34. 

 Shuck. Foss. Hym. 178. 35. 

 Phvsoscelis rufiventris, St. Farg. Ann. Soc. Ent. Fr. iii. 805. 1. 



(1834) ; Hym. iii. 207. 1. 

 Rhopalum clavipes, Dahlb. Hym. Europ. i. 291. 178. 

 Wesm. Hym. Foss. Belg. 126. 1. 



Female. Length 2|-3 lines. — Black; head shining and very 

 delicately punctured ; a slightly elevated carina runs backwards 

 from the anterior stemma between the posterior pair, passing a 

 little beyond them ; the inner orbit of the eyes and the clypeus 

 covered with silvery pubescence ; the scape and the palpi 

 yellow ; the mandibles ferruginous, sometimes yellowish in the 

 middle ; the clypeus slightly produced in front. Thorax deli- 

 cately punctured, shining ; the mesothorax with two central 

 parallel impressed lines at its base, terminating towards the 

 disk ; the metathorax smooth and shining at its base, in the 



