THE MOUNT DESERT REGION 4.").) 



I. mesocentrus (Grav.). N. E. Harbor (Minot) ; S. \Y. Har- 

 bor (Alexander), Aug. 23-Sept. 15. 



I. tuberculatus Fourcroy. Bar Harbor; S. W. Harbor, Sept. 

 6-10. 



I. pusio (Walsh.). Corfield and Penikese at light, July 30- 

 Aug. 8. 



Iseropus Forster 



I. coelebs (Walsh). Bar Harbor; S. W. Harbor, June 21- 

 Sept. 6. Parasitic on the American tent and forest tent 

 caterpillars, tussock moth, spruce bud worm, etc. 



Tromatobia Forster 



T. rufopectus (Cress.). Bar Harbor, June 13. Parasitic on 

 the eggs of spiders in the nest of the Epeiridae. 



T. rufovariata (Cress.). N. E. Harbor; S. W. Harbor; Tre- 

 mont, July 15-Aug. 23. 



Zaglyptus Forster 



Z. ixcompletps (Cress.). Bar Harbor, June 13-Sept. 9. 



Delomerista Forster 



1). xovita (Cress.). Bar Harbor, Aug. 16. 



Perithots Holmgren 



P. pleuralis Cress. Salisbury Cove, July 19. 



Zabrachypus Cushman 



Z. slossonae (Davis). Bar Harbor; S. W. Harbor; Echo 

 Lake, June 13-July 17. 



Oxyrrhexis Forster 



O. carboxatoi: (Grav.). Echo Lake, June 17-Sept. 23. 



Polvsi'hixcta Gravenhorst 



P. hi t rgessii Cress. Salisbury Cove, July 27. 



