384 The Hunting JVasps 



This Wasp is very much like Bembex rostrata 

 in size and in the arrangement of the black and 

 yellow. The chief differences lie in the follow- 

 ing characteristics : the shield of Bembex Julii 

 forms a trihedral angle, whereas it is rounded 

 and convex in the other Bembex. It also has 

 at its base a broad, chevron-shaped black band, 

 formed of two rectangular patches joined to- 

 gether and powdered with a silvery down, which 

 is very brilliant in a suitable light. The upper 

 surface of the anal segment bristles with papillae 

 and reddish hairs, as does the hinder edge of 

 the fifth segment. Lastly, the mandibles are 

 stained black at the tips only, whereas the base 

 also is black in Bembex rostrata. Their habits 

 are equally dissimilar. Bembex rostrata hunts 

 Gad-flies mainly ; Bembex Julii never preys on 

 big Flies but attacks smaller ones of greatly 

 varying species. 



Jules' Bembex is frequent in the sandy soil 

 of Les Angles, round about Avignon and on 

 the hill at Orange. 



D 



Ammophila Julii. — H. Fab. 



Length, 16 to 22 millimetres.^ Abdominal 

 petiole consisting of the first segment and half 



* '62 to '86 inch. — Translator's Note. 



