THE MOUNT DESERT REGION 419 



Mesochorus Graveuliorst 



M. BASALis Cress. Bar Harbor ; Long Pond ; Seal Cove, June 



13-Sept. 8. 

 M. LUTEiPEs Cress.? Eagle Lake; Bar Harbor, July 18-Aug. 



18. 

 M. POLiTus Prov. S. W. Harbor ; Bar Harbor, July 30-x\ug. 10. 

 M. sp. Bred from a lepidopterus alder leaf miner June 6 



(Br.). 

 M. n.sp. Bred from P. nemorata June 28 (Br.). 



Calliphrueus Foerster 



C. POPOFENsis Ashm. Bred from pear slug, June 18 (Br.). 

 Det. R. A. C. 



PoRizoN Fallen 



P. sp. Beating poplar catkins, Apr. 26 (Br.). 



Camposcopus (Foerster) Rohwer 



C. ACLERivoRus Roli. Pars. on A. comptoniella (Br.). 



Trigonalidae 



Trigonalys Westwood 



T. SULCATA Davis. Duck Brook, July 30, 1919. 



OdontauijAcus Kieffer 



0. ABDOMiNALis Cress. Bar Harbor; S. W. Harbor, June 13- 

 July 29. 



GASTEBUPTIONroAE 



The members of this family are parasitic on bees. 



Gasteruption Latreille 



G. MONTANus var. iNCERTus Cress. S. W. Harbor; Bar Har- 

 bor; Salisbury Cove, July 10-29. 

 G, TAESATORius Say. S. W. Harbor, July 28. 



