68 Journal. New York Entomological Society. [Voi. ix. 



ful dissection of uncast burrows. At first the insect makes one brood 

 cell with three empties around it ; rarely there are two cells in a line 

 and four or five around it. Very occasionally there are three brood 

 cells in a line with seven or eight empties around them. The usual 

 form is one central with three around it, and then in order as already 

 described. In one cast I found lo filled cells and eleven open cham- 

 bers around it. 



July 13th we abandoned the regular bee mine for a study of an- 

 other, higher field, which was less shaded and much hotter. Here 

 we started another pit and, as it was a question only of cell clusters, a 

 trench only thirty inches deep was needed. Here also we found a 

 cluster of ten cells, ali containing pup^e. A three-cell cluster was 

 found in which was a perfectly-developed bee, capable of flight and 

 which actually did fly a short distance in the attempt to escape. The 

 second specimen from the same cluster was fully colored ; but the 

 wings were not yet expanded ; the third was a white pupa with eyes 



beginning to color. This shows 

 approximately the diff'erence in 

 time between the ovi positions 

 of one bee and, from what I saw 

 in the examples confined in the 

 vials, there was a period of five 

 days at least between each of 

 these specimens. No bees of 

 the new brood were yet about 

 Fig. 3. Adult of Angochlora Jmmeralis. and, indeed, none of the old 



ones were seen above ground. 

 Some old bees were yet found in the burrows ; but they seemed dis- 

 pirited and were not at work. Many burrows had been abandoned by 

 their makers and there was no appearance of new digging anywhere. 

 The work of the hibernating examples was done, just about two 

 months from the time they first began to make their appearance above 

 ground. 



Roughly then, the bees began work May 14th, the first completed 

 cell with pollen loaf and egg was found June nth, and the first larvaj 

 were observed June 13th and 15th. The tgg stage, then, is very brief. 

 June 30th there were many pupae, and a period of about fifteen days 

 is indicated as the length of the larval life. The pupal stage is unex- 

 pectedly long, no actually emerged individuals being found on July 



