THE MOUNT DESERT REGION 495 



Tapinoma Forster 



T. sessile (Say). S. W. Harbor, July 11-Sept. 6; Station 

 F173. 



DOLICHODERIS Lllllf] 



I), (hypoclinea) plagiatus Mayr. Section 26, Aug. 7. 



D. (hypoclinea) taschenbergi Mayr. Robinson Mt., Aug. 



24. 

 D. plagiatus Mayr. var. S. W. Harbor, Sept. 6. 

 D. plagiatus var. inornatus Wheeler. Breakneck Pond, Sept. 



8. 



Lasius Fabricius 



L. (acanthomyops) claviger Roger. Deer Brook, Station 



F218, one individual taken. 

 L. (acanthomops) interjectus Mayr. Corfield, July 21. 



Scarce. 

 L. niger alienus americanus Emery. Under a barn Sept. 13. 



Stations F150 and F173. 

 L. niger var. neoniger Emery. Corfield at melon bait. Said 



to be the most abundant ant and hence of all insects. 

 L. niger var. sitkaensis Pergande. Long Pond ; Bar Harbor ; 



Corfield, June 27-Sept. 15. 



L. (CHTHONOLASIUS) UMBRATUS MIXTUS APHIDICOLA (Walsh). 



S. W. Harbor; Green Mt., July 15-25; Pretty Marsh under 

 stone, Aug. 21. Washed up on the shore of Bubble Pond in 

 large masses, Sept. 7, '35. 

 L. ( CHTHONOLASirs ) umbratus subumbratus Viereck. One 

 specimen taken July 11, '29. 



Formica Linnaeus 



F. fusca Linn. Common, June-Sept. This species makes 

 large mounds. Near the foot of Western Mt. was a mound 

 that measured 7x11 feet, with an average height of 2 feet. 

 They spread very rapidly by forming small colonies. 



F. fusca var. algida Wheeler. One specimen was swept on 

 the top of Robinson Mt., Aug. 24, '34. 



