22 CRABRO CLAVIPES. 



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

 their tarsi dilated. 



29. Crabro palmipes. 30. C. clypeatus. 



Div. 5. Abdomen subsessile. 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 the 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 simple. (Sp. 1, 2.) 



1. Crabro clavipes. 



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

 arum posticarum apice nigro. 



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



& Cab. Mus. Linn. Soc. $ . 



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

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

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



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



Shuck. Foss. Hym. 178. 35. 

 Physoscelis 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 



