British Hymcnoptera. 249 



1 segment, and mucl 

 enlarged spines of do. 



Fig. 7. Mcgachile argentata, S armatiu-e. 



7 a. ,, ,, 6tli ventral segment, and much 



PLATE X. 



1. Heriadcs truncorum, $ armature. 



la. ,, ,, 5tli ventral segment. 



2. Stelis atcrrbna, 3 armature. 



3. Anthidium vianicatum, $ armature. 



3«.. ,, ,, 8th ventral segment. 



4. Chclostoma Jiorisomne, $ armature. 



4(X. ,, ,, 5th ventral segment. 



5. ,, camijanularmn, $ armature. 



5 a. ,, ,, 7th ventral segment. 



5 6. „ „ 8th „ 



6. Eucera longicornis, 3" armature. 



Co.. ,, ,, 7th ventral segment. 



6&. „ „ 8th 



7. Anthopliora retusa, $ armatiu-e. 



1. Saro]}oda bimaculata, ^ armature. 



la. „ „ 7th ventral segment. 



Ih. „ „ 8th 



2. Antlio]pliora f areata, J armatm-e. 



2a. . „ 5, 7th ventral segment. 



2 6. „ „ 8th 



3. ,, quadrimaculata, 3 armature. 



3 a, ,, ,, 7th ventral segment. 

 3 6. „ „ 8th 



4. Osmia xnlicornis, 3 armature. 



5. Ceratina cyanca, ,, 



5 a. „ „ 6th ventral segment, 



6. Psithyrus Barhutellus, 3 armature. 



6 a. „ ,, 7th ventral segment. 

 6 6. „ „ 8th „ 



7. „ vestalis, 3 armature. 



8. „ rtopcstris, 3 armature, 8th ventral segment 



showing beneath. 



