U. S. NATIONAL MUSEUM 



PROCEEDINGS, VOL. XXXI PL. VI 



Fiff. 1. 



f^ C4 ', hi Ci J 



t ^N 



mc ' pc 



Fig-. 3. 



Fiff. 4. 



Fiff. 5. 



Fiff. 6. 



North American Digger Wasps. 



For explanation of plate see pages 421-422. 



