96 WASP STUDIES AFIELD 



them, or whether she had left them here only as a relay 

 station in bringing in the food. Since the wasp gave no 

 promise of coming out, we opened the log and got her. 

 The entrance-gallery pierced the hard wood for one and 

 a half inches. It had evidently not been made by this wasp, 

 but must have been cut by some beetle during the life of 

 the tree, because the wounded surface was all healed over. 

 Where this previous burrow had reached the rotten wood 

 beneath, the wasp had continued the gallery. The length 

 of this tunnel was seven inches, not exactly straight but 

 oscillating a little, while following the same general direc- 

 tion. The tunnel came to an end and a little to one side of 

 the terminus was a completed pocket containing four flies, 

 3 $ 's and i $ , of Promusca domestica L. [C. H. T. 

 Townsend]. 



Neither egg nor larva was found and we could not tell, 

 upon rudely chopping open the log, whether this cell was 

 connected with the gallery, or even whether it was sealed. 

 We suspect that the wasp was only storing this cell. 



Barth has found this wasp nesting in an old log in com- 

 pany with Crdbro obscurus, C. montanus and C. sexmacu- 

 latus. The adults are nectar feeders, as recorded in the 

 papers of Banks and Robertson. All of these records ap- 

 pear under the generic name Crabro. 



Paranothyreus 3 cingulatis Pack. [S. A. Rohwer]. 



In a steep, sandy bank, perhaps fifteen feet wide and 

 twelve feet high, near the margin of the lake, was a fairly 

 large colony of these black-and-yellow wasps. There was 

 no vegetation on this sandy area (fig. 24), but at some 

 recent time a large pile of straw had been dumped and 



3 The generic names of this species were formerly "Crabro and 

 Thyrcopus, fide Rohwer. 



