38 Journal New York Entomological Society. [voi. ix. 



captured. Plaster cast made of the burrow showed a perpendicular 

 drop of over 15 inches without indication of any lateral. Another, 

 similar burrow, was cast on the same day and the bee inclosed in the 

 plaster. This was shorter than the other, but had a lateral in which 

 was a filled honey pouch, and a heel which indicated a cartridge be- 

 low. The cartridge was accordingly sought for and found. The con- 

 clusion is a fair one that the bee first caught was not digging its first 

 burrow. If my belief that most of these bees change to adults in fall 

 is correct, there should not be much difference in the date at which 

 they issue and begin to dig. 



This species was determined for me by Mr. Ashmead and I have 

 specimens from various parts of the State taken May and June, most 

 of them on the latter month pollen-loaded. Unfortunately the day of 

 the month is not indicated, hence cannot say how late in June the 

 species flies. 



Andrena bicolor Fabr. 



This is nearer to vicina in size but readily distinguishable by the 

 rusty thoracic vestiture which made it easy to recognize the bee in the 

 cast. The bee was first seen June 7th, entering a hole larger than usual, 

 and 3)^ ounces of liquid plaster were required to fill it. It was 

 nearly perpendicular for 23 inches, then began to twist irregularly, 

 without apparent need, until it measured 385^ inches in length at 30 

 inches from the surface. There was a cell of the usual composition 

 at the end, loaded with the honey and pollen paste. The lateral at 

 the bottom was not so evident, the tube twisting so irregularly that it 

 seemed like a mere continuation of the twist. That this is not a rule 

 was shown by a second cast made the same day, of the same species. 

 Here there was an almost straight drop of 32 inches then a marked six- 

 inch lateral to the honey pouch. 



June 8th, a cast was taken out which dropped down forty inches be- 

 fore forming a short oblique lateral. The loaded cell in this case was 

 fully 41 inches below the surface of the ground and at probably a 

 nearly uniform temperature the year around. 



June nth, two other burrows of this same species were cast. The 

 first included the bee so that no mistake was possible and the cast 

 measured to the honey pouch 37^ inches. There was no heel and 

 no indication that the gallery or burrow had extended below that 

 point. The second cast was twisted so as to measure 34 inches at 30 



