332 WASP STUDIES AFIELD 



of the prey is not mentioned ; it might be that she uses sub- 

 terranean caterpillars, since our notes show that she enters 

 numerous holes in a foraging manner. 



Robertson finds the adults frequenting many species of 

 flowers. 



Odynerus designatns Cress. [S. A. Rohwer]. 



Two of these Eumenid wasps were found fast asleep on a 

 pig-weed at 4 : 30 p. m. on August 28. Both were curled 

 around leaf petioles. At 4 a. m. the following day, it 

 rained, and rain continued to fall until 10 o'clock. At 

 9 : 30 in the morning, they were in the identical places and 

 positions, and dripping wet. The rain had not aroused 

 them to activity in the least; on the contrary, they were in 

 a kind of stupor which rendered them very easy to pick up. 

 They were not alone in their misery. Nearby were found 

 a number of other insects, Pelopoeus caementarium, May 

 beetles and others, behaving similarly. 



Odynerus pedestris Sauss. [S. A. Rohwer]. 



On a clay bank (see fig. 27), rising about six feet above 

 the level of the ground, we saw, on October 3, this Eu- 

 menid entering and leaving an open hole at intervals. After 

 catching her, we dug up the nest; this was of the exact 

 size of the drawing in figure 65. 



This wasp makes a gallery and, from time to time, con- 

 structs chambers beneath it, as they are needed, similar to 

 the manner of Philanthus sp., except that the latter usually 

 builds them from the sides of the gallery, whereas this one 

 builds the gallery, drops a branch of it to a chamber, con- 

 tinues the gallery and makes another chamber therefrom, 

 and so on. 



