terminal segments of Aculeate Hymenoptera. 267 



Explanation of Plate XIII. i 



Fig. 1. Formica rufa, 3' armature. 



la. ,, ,, 8th dorsal segment, showing penicilli. 



2. Mutilla europcea, $ armature. 



2 a. ,, ,, 8th dorsal segment, showing penicilli. 



3. Myzine 6-fasciata, $ armature. 



3 a. ,, ,, 8th dorsal segment, showing penicilli. 

 3&. ,, ,, 8th ventral segment. 



4. Scolia bicincta, ^ armature. 



4 a. ,, ,, 8th dorsal segment. 



4 6. ,, ,, 8th ventral segment. 



5. Tiphia vwrio, S armature. 



5 a. ,, ,, 8th ventral segment. 



6. Povipilus viaticus, $ armature. 



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



6&. ,, ,, 8th dorsal segment, showing penicilli. 



7. Philanthus coronatus, $ armature. 



8. Astata hoops, 8th dorsal segment, showing penicilli. 



9. Crahro cribrarius, $ armature. 



10. Melliturga clavicornis, 3 armature. 



11. Psammophila viatica, ,, 



12. Bemhex rosirata, ,, 



12 a. ,, ,, 8th ventral segment. 



13. Systropha curvicornis, $ armature. 



13 a. ,, ,, 7th ventral segment. 



13 5. „ „ 8th 



14. Stizus ruficornis, S armatm-e. 



14 a. ,, ,, 8th ventral segment. 



15. Antliidium Jiavilabre, $ armature. 



15 a. ,, ,, 5th ventral segment. 



16. Dioxys cincta, $ armature. 



17. Lithurgus cornutus, $ armature. 



18. No7nia difformis, ,, 



19. Palarus sp., ,, 



20. Odynerus jparietum, ,, 



21. Chalicodoma muraria, ,, 



21 a. ,, ,, 6th ventral segment. 



