290 Sipiopsis of British Hymenoptera. 



Fig. 6. Andrena Trimmerana, $ posterior leg to show patella (a). 



7. ,, ,, base of posterior tibiae enlarged ; 



[a) patella. 



8. Sphecodes piUfrons, $ posterior wing to show alar hooks. 



9. ,, subquadratus ,, ,, 



PLATE XI. 



1. Cilissa hceviorrlwidalis, $ 8th ventral segment. 

 \a. „ ,, ,, armature. 



lb. ,, ,, ,, 7th ventral segment. 



2. ,, leporina, <? 6th ventral segment. 



2a. ,, ,, ,, 7th and 8th ventral segments. 



26. ,, ,, ,, armature. 



3. Dasypoda hirtipes, $ armature. 



3«. ,, ,, ,, 7th ventral segment. 



36. ,, ,, ,, 8th ventral segment. 



4. Andrena Trimmerana, $ 8th ventral segment. 



4a. ,, ,, ,, armature, to show normal form 



of this organ in the genus. 



5. ,, Hattorfiayia, 3" armature. 



6. Hallctun ; apex of abdomen in $ , showing rima on 5th 



segment. 



