APIARIJE. 



145 





len, and two of them a small larva. On the 29th of June six 

 full-grown larvae were exhumed, and one about half-grown. 

 About the first of August the 

 larva transforms to a pupa, and 

 during the last week of this month 

 the mature bees appear. 



In HaUctus, which is a genus 

 of great extent, the head is trans- 

 verse, and flattish; the mouth- 

 parts are of moderate length, the 

 tongue being very acute, with 

 acute paraglossae half the length 

 of the tongue, while the labial 



palpi are not quite so long as 



the paraglossae. There are three 



subcostal cells in the wings, with 



the rudiments of a fourth often 



present, and the second cell is 



squarish. The abdomen is ob- 

 long ovate, with a longitudinal 



linear furrow on the tip in the 



female. In the males the body 



is longer and the antenna? more 



filiform and slender than usual in 



this family. 



The larvfe are longer, and with 



more acutely convex segments 



than in Andrena. The pup^e 



differ much as the adult bees from / 



Andrena, especially in the shorter 



mouth-parts. ^^^ ^^ 



Halictus parallelus Say excavates cells almost exactly like 

 those of Andrena ; but since the bee is smaller, the holes are 

 smaller, though as deep. Mr. Emerton found one nest, in a 

 path, a foot in depth. Another nest, discovered September 9th, 

 was about six inches deep. The cells are in form like those of 

 Andrena, and like them are glazed within. The Qgg is rather 

 slender and much curved ; in form it is long, cylindrical, ob- 

 tuse at one end, and much smaller at the other. The larva 

 10 



^ ^ 



