THE MOUNT DESERT EEGION 447 



B. TEENARius Say. Orange-banded bumblebee. Co mm on, June 



7-Aug. 24. 

 B. TERRicoLA Kbj. Commou all summer. 

 B. VAGANs F. Sm. With us all summer but in smaller numbers 



than the three next above. 



PsiTHRUS Lepeletier. The Usurper Bees 



P. ASHTONi Cress. Bar Harbor ; S. W. Harbor ; Narrows, June 

 7-Aug. 14. 



P. LABORiosus Fab. S. W. Harbor, July 15. 



P. LABORiosus var. ciTRiNus Smith. Bar Harbor; S. "VV. Har- 

 bor, July 10- Aug. 14. 



P. TRICOLOR Frankl. Bar Harbor; Tremont, July 19-Aug. 23. 



Apidae 



Apis Linnaeus 



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

 mon honey bee. 



