66 



Journal New York Entomological Society. [Voi. ix. 



Cast 5 had three normal cell clusters and two sets of imperfect proc- 

 esses, one almost at the extreme bottom, nearly four feet under 

 ground. In this cast pupae and full-grown larvae were found in the 

 upper two series of cells. In the lower series pollen masses and eggs 

 were found. 



Cast 6 was a complicated affair with four cell clusters. Two bees 

 were found in the cast and a third was taken from the mouth of the 

 burrow before the cast was made. When cleaning out the opening 

 preparatory to casting, a bee came up with a load of clay to close it. 

 I removed the material, but on turning found that another load had 

 been deposited. I waited for the next supply and captured the bee 

 with the forceps ; immediately thereafter a second bee came up ; but 



before she could return with another 

 load the plaster was poured in. Two 

 bees were in the cast, a third had been 

 captured at the entrance : what relation 

 was there between these examples ? 

 There were four large cell clusters, one 

 of them quite a distance from the up- 

 right, and in three of these clusters lar- 

 vae and pupae were found. In the fourth 

 were pollen loaves and eggs. 



Cast 7 was the most complicated of 

 the series, carrying four entire and two 

 partial clusters. Four bees were im- 

 bedded in it. Larvje and pupae were 

 taken out of all the clusters. One bee 

 was imbedded in a cell cast, as if she 

 had been engaged in filling it with pollen. The others were ira bed- 

 ded in different portions of the upright. 



The result of the castings and diggings made it evident that on June 

 30, all stages from eggs to pupae occurred in the burrows. In no 

 pupa was there any tendency to color up, even in the eyes. The in- 

 ference was that the pupa was a recent formation and that the change 

 to the adult was at some distance off. 



As to the sex of the pupae — all of them seemed to be males. This 

 was easily determinable by the slender form and by the prominent 

 claspers of the genitalia which in the adult are almost completely 

 withdrawn. I made no effort to discover sexual differences in the larvae. 



Larva of Auzochlora 



