U. S. NATIONAL MUSEUM 



PROCEEDINGS, VOL. XXXI PL. IX 



Fiff. 13. 



Fiff. U. 



Fiff. 15. 



Fiii'. 16. 



Fiff. 17. 



Fiff. 18. 



Fiff. 20. 



Fiff. 19. 



Fiff. 21 



North American Digger Wasps. 



For explanation of plate see page 423. 



