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 2| 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 fiagellum 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. 



12.3. Crabro hilaris. B.M. 



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

 tured ; the scape, basal joint of the fiagellum, 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 tegulse 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 maculae on the 

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

 and fifth segments with a broad yellow fascia on their apical 



