THE MOUNT DESERT REGION 505 



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



14; Station F259. 

 H. athabascensis Sand. Mt. Desert (Br.), May 2. 

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

 H. cressonii Robts. Bar Harbor; Green Mt. ; Echo Lake, 



June 11- July 25. 

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

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

 H. leucozonius (Schrank). Mt. Desert, July 13. Not common. 

 H. NYMPHAEARUM Robts. Narrows, Aug. 13. 

 H. p^dsus Sm. Mt. Desert, July 11. Not common. 

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



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



15-Sept. 2. 

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

 H. rubicundus (Christ.). Mt. Desert, July 11; Section 23, 



Sept. 15. 

 H. similis Smith. Common, July 6-Aug. 17. 

 H. truncatus Robts. S. W. Harbor, Sept. 6. 

 H. chloralictus Robts. Bar Harbor; Long Pond; Narrows, 



June 15-Aug. 21. 

 H. (chloralictus) planatus Lovell. Mt. Desert, July 10. 

 H. (chloralictus) viridatus Lovell. Mt. Desert, July 17. 

 H. ZEPHYRUS Smith. S. W. Harbor; Echo Lake, July 10-17. 



Halictoides Nylander 



H. novaeangliae (Robts.). This small bee occurs in abund- 

 ance in the southern part of the State, and is supposed to 

 frequent only the flowers of Pickerel Weed (Pontederia 

 eordata) and its life is supposed to conform in a way to the 

 flower of this plant. I have examined thousands of blos- 

 soms in different parts of the Island in the past few years 

 and failed to find any of the bees, but I swept one specimen 

 in the swamp back of Schooner Head on August 28, 1936, 

 which is interesting, because there is no Pickerel Weed in 

 that swamp. 



