THE MOUNT DESERT REGION 509 



Stelis Panzer 



S. lateralis Cress. S. W. Harbor, July 20. Parasitic in the 

 nests of Alcidamia producta Cr. 



Bombtdae 



Bombus Latreille {Br emus Panzer). The Bumblebees 



B. affixis Cress. Station F279, July 12. Scarce. 



B. bimaculatus Cress. "Mt. Desert," July 30 (McAtee). 



B. bobealis Nyl. S. de Mont Spring, July 3 (Salman). 

 Scarce. 



B. febvidus Fab. Nurseries, June 27 ; N. end of Eagle Lake, 

 Sept. 26. 



B. pebplexus Cress. Common, June 17-Sept. 30. 



B. tebxabius Say. Orange-banded bumblebee. Common, June 

 7-Aug. 24. 



B. teebicola Kby. Common all summer. 



B. vagaxs F. Sm. With us all summer but in smaller num- 

 bers than the three next above. 



Psithyrus Lepeletier. The Usurper Bees 



P. ashtoxi (Cress.). Bar Harbor; S. W. Harbor; Narrows, 



June 7- Aug. 14. 

 P. labobiosus (Fab.). S. W. Harbor, July 15. 

 P. laboriosus var. citbixus (Smith). Bar Harbor; S. W. 



Harbor, July 10-Aug. 14. 

 P. febxaldae Franklin. Bar Harbor; Tremont, July 19- 



Aug. 23. 



Apidae 



Apis Linnaeus 



A. mellifeba Linn. Generally distributed. This is the com- 

 mon honey bee. 



