242 Journal Xevv York Entomological Society. [Voi. xix. 



was taken in and as the carrier left, another bee, also laden with 

 pollen, entered. Again the first bee came, and as she was in the 

 hole number two arrived and entered also. Both came out hurriedly, 

 one obviously in pursuit of the other ; around and around they buzzed, 

 finally clenched, rolled over on the ground, separated, and then both 

 departed. Presently, however, one returned, undoubtedly the owner 

 of the nest, and rapidly removed three tremendous loads of pollen 

 from the burrow, two of which were dropped intentionally or un- 

 intentionally a short distance from the entrance, and the third of 

 which was carried away. 



Fig. 2. Pupa of Eniphor bombiforuiis Cress. 



Digging into several of the burrows, pollen in the same loose 

 condition as when first carried in was found in some, and in others 

 the ready-formed three-eighth-inch pollen ball. This ball was less 

 than one fourth the size of the pollen mass used to form it. To 

 one a single slender, elongated, curved tgg was attached and on 

 another a small larva was feeding. The burrows, it appears, are 

 not covered up after the egg is laid, as this egg and larva were dug 

 from open burrow^s; and besides I saw nothing that looked like a 

 covered burrow. 



Twice during the afternoon spent in watching the bees a little 

 w-asp, which Mr. Viereck determines as Lyroda siibita Say, alighted 

 among the nests and, nervously walking about, entered one burrow 

 after the other, occasionally remaining in one for the greater part of 

 a minute. By its peculiar actions I supposed it to be parasitic on 



