116 Journal New York Entomological Society. [v6l v. 
body and near the tips of the middle pair of stylets. The pair of the 
eighth ring is later developed. They appear first as two oval rings remote 
from the middle, and larger axes at right angles to body. Early in the 
semipupa stage, when they first appear as two slender elongated stylets, 
lying across the eighth ring, with square bases facing each other on each 
side of the mesial line of the body, while the ends look outward towards 
either side of the body, at this time the mesial pair or true ovipositer 
on the ninth ring is long and slender, while the outer pair have only 
their triangular tips developed, which slightly converge toward tips of 
second pair. 
Fig. 12. Bombus fervidus. Pupa. 
Bombus vagans. 
Nesting-habits , Larva and Pupa .—In the empty cells there were no 
larvae or eggs to be found. In the bottom the sides a little way up were 
covered with a thin layer of meal or pollen which had been placed in 
them by the queen, and this thin layer of refuse left had been pressed to 
the side of the cell by the body of the fully-fed larva which had rejected 
it. In one empty cell there was a considerable quantity of pollen, which 
was exceedingly fine, and under high powers presented a spherical shape, 
the surface being thickly punctured. 
In the twelve workers there was no remarkable variation in size, such 
as was observed in another colony of pinned bees, undoubtedly of the 
same species. The single male was of the same size as the worker; it 
slightly exceeded some workers in size, but was smaller than some 
others; among a set of alcoholic specimens it could not at first glance 
be distinguished from the workers; there is no difference in the length 
of the maxillae or of the labial appendages. 
From the nest which Mr. Putnam found in an old stump under a 
barn, August 15, he took only fifteen adult bees, viz., one male, two fe¬ 
males and twelve workers; but the number of bees then constituting the 
