OF NEW ENGLAND. 131 



Andrena, carried to England from Nova Scotia, Avhich was 

 in the collection of Mr. G. B. Sowerby; it was figured by 

 Prof. Westwood and with many details formed plate 59 of 

 Griffith's Cuvier, Part Insects. Though named by Mr. 

 Gray, no description has ever been made. The insect has 

 not subsequently been noticed by observers in this coun- 

 try. 



On the 29th of April I captured an Andrena placida 

 Smith flying about the floAvers of the Mezercon. This 

 specimen was stylopized, and flying briskly within the 

 nest and in company with the bee was a male Stylops, 

 which agrees in all respects with Westwood's figures, ex- 

 cept that he does not represent the abdomen as being long- 

 enough. In a few hours my specimen died, and its abdo- 

 men long and flexible, which the insect had kept in con- 

 stant motion, opening and shutting its large and broad 

 anal forceps, soon partially dried up, then resembling more 

 Westwood's figure which must evidently have been taken 

 from a dried specimen. The whole body, the antennas 

 and appendages of the mouth were velvety black ; abdo- 

 men slightly brownish ; legs and anal forceps pale resinous 

 brown ; the tarsal joints, and tips of tibias pale testaceous. 



I have little doubt but that this male was at the time of 

 capture adhering to the body of the bee in order to unite 

 with the wingless female within the abdomen of the bee, 

 and thus the use of the long flexible abdomen and large 

 terminal forceps are obvious. 



Is the wingless specimen a pupa, or female ? That it is 

 a female, and was destined in about six weeks to produce 

 immense numbers of young there can be little doubt.* 



I proceed to notice a female and young discovered dur- 

 ing the preceding year. 



On the 18th of June while collecting Hymenoptera 

 which were feeding upon the flowers of the garden Rasp- 

 berry I captured an Andrena vicina Smith, which was 

 stylopized. Near the middle of the abdomen, on the upper 

 side, projected from between the rings, the flat triangular 

 head of the female. Upon drawing out the whole body, 



* During the middle of May I captured two more of the same species of 

 Andrena, each with a female Stylops within its body. 



