HYMENOPTEEA. 169 



or close up under the eaves, or, failing an entrance to such 

 a favored locality, they will glue them to the under side 



Fig. 68. — Nest of a mud-dauber. (Natural size. Kellogg.) 



of stones. If you watch a mud-dauber at work you will 

 notice the curious habit it has of jerking its wings 

 frequently. 



One family of the digger wasps deserves special 



Fig. 6g. — The cicada killer, Spheclus speciosus. 



mention; it is the family of the Bembecidas. These 

 wasps are to be expected to make more noise than a wasp 



