442 BIOLOGICAL SUEVEY OF 



A. wEEDi Viereck. Station F236, May 11. 



A. wHEELEBi Graen. Mt. Desert, July 15 (Lutz). 



A. wiLKELLA Kby. S. W. Harbor; Bar Harbor, June 7-July 



22. On flowers of the raspberry and gooseberry. 

 A. sp. Station F241, April 21. 

 A. sp. Station F301, April 25. 



Calliopsis Smith 



C. ANDEENiFOEMis Smith. Station F259, July 26. Social para- 

 sites on other bees. 



Halictus Latreille 



These are gregarious mining bees which excavate their 

 nests in old gravel pits and the like. In some cases several 

 bees of a species will excavate galleries that lead to a common 

 entrance which is guarded by a bee whose head is used as a 

 portal. 



H, AECUATiTs Robts. Bar Harbor ; Narrows, July 18- Aug. 14 ; 

 Station F259. 



H. (Oxystoglossa) confusus Sm. Bar Harbor, July 17; New- 

 port Meadow, Sept. 2. 



H. coeiaceus Smith. Common, July 6- Aug. 17 ; Station F259. 



H. CEESsoNi Robts. Bar Harbor ; Green Mt. ; Echo Lake, June 

 11-July 25. 



H. Foxii Robts. Bar Harbor, June 7-13. 



H. LEEOTJxi Lepel. Common, July 6-Sept. 6. 



H. LEUcozoNius Schrank. Mt. Desert, July 13. Not common. 



H. NYMPHAEAEUM Robts. Narrows, Aug. 13. 



H. FiLosus Sm. Mt. Desert, July 11. Not common. 



H. PEOVANCHEEi D. T. Bar Harbor; S. W. Harbor; Middle 

 Road; Newport Meadow; Stations F242 and F249, Aug. 15- 

 Sept. 2. 



H. QUADEiMACULATUs Robts. S. W. Harbor, July 13. 



H. EUBicuNDUs (Crist.). Mt. Desert, July 11; Section 23, 

 Sept. 15. 



