116 



Journal New York Entomological Society. 



[Vol. 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 rins; is long and slender, while the outer pair have only 

 their triangular tips developed, which slightly converge toward tips of 

 second pair. 



Fig. 12. Bombtis 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 maxilloi 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 



