Appendix 



white. The sixth segment has a band like 

 those which come before, but shorter and 

 often reduced to two dots. The second seg- 

 ment has underneath it a longitudinal carina, 

 raised and spineshaped at the back. Lastly, 

 the anal segment carries below it a rather 

 thick angular projection. The rest is the 

 same as in the female. 



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 following 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 rect- 

 angular patches joined together and pow- 

 dered with a silvery down, which is very bril- 

 liant 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. 

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