THE MOUNT DESEET REGION 497 



PSEUDISOBRACIIIUM Kieff 



This is Isobrachium Ashm, nee. Forst. 

 P. sp. Mt. Desert, Sept. 10 (Br.). 



Vespidae. The Social Wasps 

 Eimenes Latreille. The Potter Wasps 



E. fraterna Say. Stations F133 and F259. Scarce. 

 E. globulosa Sauss. Common, June 16-July 25. 



Ancistrocerus Wesmael 



A. catskill var. albophaleratus Sauss. Bar Harbor ; Green 



Mt., July 18-25. 

 A. antilope (Panz.). Bar Harbor; N. E. Harbor; S. \V. 



Harbor, July 20-Aug. 22. 

 A. catskill (Sauss.). Narrows (Salman), July 21. 

 A. Tigris (Sauss.). Bar Harbor; S. W. Harbor; Long Pond, 



Aug. 18-Sept. 7. Station F159. Section 16, Aug. 7. 

 A. unifasciatus (Sauss.). Salisbury Cove, Aug. 11. 

 A. waldenti (Vier.). Bar Harbor; Green Mt., June 7-July 



25. 



Symmorphus Wesmael 



S. albomarginatus (Sauss.). Bar Harbor, Aug. 16. 

 S. canadensis (Sauss.). Witch Hole Pond, July 30. 

 S. cristatfs Sauss. Bar Harbor, July 24. 



Odynerus Latreille 



0. kennicotianus Sauss. Bar Harbor, July 27. 

 0. (rygchium) leucomelas Sauss. S. W. Harbor; Salis- 

 bury Cove, July 10-17. 



Vespula Thomson 



V. (dolic ho vespula) adulterina (Buyss.) var. artica Roh- 

 wer. Northern hornet. Echo Lake; N. E. Harbor; Bar 

 Harbor; Green Mt., July 12-29. 



