416 HYMENOPTERA. 



and the third at the base of the fifth; sometimes a narrow stripe 

 at the base of the sixth. 



Hab. Sicily. 



This species bears a close resemblance to C. vagus, but is at 

 once distinguished by the acuter angles of the prothorax. The 

 femora have sometimes their basal half black. 



122. CRABRO BUCEPHALUS. 



Male. Length 2f lines. Black and shining : the head wider 

 and larger than the thorax, with scattered punctures, the ocelli 

 placed in a triangle on the vertex, a deep depression at the side 

 of the posterior pair ; the face deeply depressed, thinly covered 

 as well as the clypeus with silvery pubescence ; the tips of the 

 scape and the flagellum rufo-piceous ; a yellow spot at the inner 

 orbit of the eyes, towards the vertex ; the mandibles yellow, fer- 

 ruginous towards their apex, with the tips black. Thorax with 

 a few scattered punctures ; the collar elevated, the anterior 

 lateral angles acute ; the scutellum, tubercles and collar yellow ; 

 the wings hyaline and iridescent ; the legs rufo-testaceous ; the 

 tips of the anterior and intermediate femora, their tibiae and 

 tarsi, yellow, the tibiae with a dark stain beneath ; the posterior 

 femora yellow at their base. Abdomen : the first segment with 

 two spots in the middle, the second segment with a large ovate 

 macula on each side. 



Hab. Sicily. 



123. CRABRO HILARIS. B.M. 



Female. Length 4 lines. Black : the head closely punc- 

 tured ; the scape, basal joint of the flagellum, the clypeus and 

 mandibles, yellow, the latter black at their apex ; the clypeus 

 covered with golden pubescence. Thorax closely punctured; 

 the collar, tubercles, an oblong spot beneath the wings, with 

 one or two minute dots behind, the tegulae, scutellum, and a 

 minute spot at its anterior angles and two spots on the post-scu- 

 tellum, yellow ; the metathorax ruggedly sculptured ; the wings 

 fulvo-hyaline, the nervures and a stain on the tegula? ferrugi- 

 nous ; the apex of the wings smoky ; the legs yellow, a rufo- 

 piceous stain on the anterior and intermediate femora above, the 

 posterior pair entirely so ; the claw-joint of the tarsi ferruginous. 

 Abdomen elongate, lanceolate, the first segment narrowed at its 

 base and forming a petiole ; the petiole dark rufo-piceous, the 

 apical half of the segment yellow ; two large macula? on the 

 second segment nearly touching in the middle, the third, fourth 

 and fifth segments with a broad yellow fascia on their apical 



