the mount desert region 161 



Ceratinidae 



Ceratina Latreille 



C. DUPLA Say. Bar Harbor, June 25. It makes its nest in 

 the pith of briars, etc. 



Apidae 



Bremus Panzer (Bombus Latreille). Bumble bees 



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



B. EERviDUs Fab. Bar Harbor, June 7. 



B. PERPLEXus Cress. Common, June 17-Sept. 6. 



B. TERNARius Say. Orange-banded bumble bee. Common, 



June 7- Aug. 24. 

 B. TERRicoLA Kbv. Bar Harbor; N. E. Harbor (Minot) ; S. W. 



Harbor, June 14-Aug. 25. 



PsiTHYRUs Le Peletier 



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. W. Har- 

 bor, July 10-Aug. 14. 



P. TRICOLOR Frankl. (P. fernaldi Frankl.). Bar Harbor; Tre- 

 mont, July 19-Aug. 23. 



Apis Linnaeus 



A. MELLiFiCA Linn. Honey bee. 



Order DIPTERA 



Nematocera 



Ptychoptera Meigen 



P. RUFiciNCTA 0. S. Bar Harbor, July 21-24; Echo Lake, 

 Sept. 1-4 (Alexander). 



BiTTACOMORPHA Westwood 



B. cLAviPEs Fab. 'Phantom crane-fly.' Bar Harbor, July 

 21-26; Echo Lake, Sept. 1-4 (Alexander). 



BiTTACOMORPHELLA Alexander 



B. joNEsi Johns. Long Pond, July 16; foot of Pickett's Mt., 

 July 21. 



