ISELY: EUMENID^ OF KANSAS. 299 



bees. The nest was lined with a kind of paper, and so was 

 the burrow. 



The upper of these cells contained the six caterpillars that 

 I had seen stored, and an egg suspended from the roof of the 

 cell, in a manner similar to that of the other eumenids that 

 I observed. The next cell was packed with caterpillars, 

 eighteen of them, but I did not find the egg. All the cater- 

 pillars that I investigated responded to stimulation. 



The two remaining cells I left unopened and kept in a tin 

 box. On September 14 a male wasp emerged from one of 

 them, at least two months and eight days after the cell had 

 been stored. Instead of breaking open the cap of the cell 

 when he emerged, this wasp cut out a circular hole in the side 

 of the cell. He was influenced in this, no doubt, because the 

 cell lay on its side in the box instead of upright as it should 

 have done naturally. The length of time spent by the wasp 

 within the cell may also have been affected by the abnormal 

 conditions. 



O. hildagi is a rare wasp in western Kansas. But four 

 specimens were taken during the summer's trip. 



Ochjnerus sulphuritinctiis Vierick. 

 A single female of this species was taken by Mr. Williams, 

 coming out of an old mud dauber's nest, located under a ledge 

 in the chalk cliffs on the Smoky Hill river in Trego county. 

 It was the only specimen of this species taken during the sum- 

 mer. It was taken -July 10. 



Eumenes bolli Cresson. 



On tall prairie grass and weeds in a ravine in a Ness county 

 I found a favorite night resort for thread-waisted sphecids of 

 the genus Ammopliila. There, more or less protected from 

 wind, they would collect in the evening to spend the night, 

 grasping the grass stems with their mandibles and legs, hold- 

 ing their bodies rigidly away from the stems. A number of 

 scoliids was also collected in this ravine, resting on horizontal 

 branches of weeds and on grass blades. There also I found a 

 solitary Eumenes bolli. 



This wasp was hanging on a horizontal branch of Dalea sp. 

 It did not hold its body rigid and in line with the stem as did 

 the Ammophila, but held itself at right angles to the stem, with 

 its long petiolate abdomen curled under it. With its legs it 



