f)(>4 BIOLOGICAL SURVEY «>K 



A. milwaikkxsis Graen. Bar Harbor; Echo Lake, June 8- 



July 12; Witch Hole on blackberry flowers. This species 



is frequently stylopized. 

 A. mikanda Smith. Eden, July 11. 

 A. nubecula Smith. Bar Harbor, Sept. 9-11. 

 A. placida Smith. Station F240, May 11. 

 A. salictaria Robts. Station F240, May 11. 

 A. thaspii Graen. Echo Lake; N. E. Harbor (Minot), .lime 



18-July 8. Stylopized. 

 A. tumida Vier. Echo Lake, July 12, 1918. Type locality. 

 A. vicina Smith. Bar Harbor, June 8. On flowers of fruit 



trees. 

 A. weedi Viereck. Station F236, May 11. 

 A. wheeleri 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. ANDRENiFORMis Smith. Station F259, July 26. Social par- 

 asites ou other bees. 



Epeolus Latreille 



E. scx t tellaris Say. Fair Grounds, Aug. Station F159. 



Triepeolus Kobertson 



T. donatus (F. Sni.). Section 28, June 17. 



Halictus Latreille 



These are gregarious mining bees which excavate their 

 nests in old gravel pits and the like. Tn 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. 



