THE MOUNT DESERT REGION 44.'! 



I'. ERicKsoNTi Hartig. Raised by Salman from larvae Aug. 



24 and of which some were parasitized by (Achaetoneura 



tenthredinidarum Town). Bred from larch Aug. 

 P. geniculata Hartig. Abundant on mountain ash, June to 



August. 

 P. murtfeldtiae .Marl. Echo Lake; S. W. Harbor, June 21- 



July 10. 

 P. sp. near pallicoxa Roh. S. W. Harbor, July 29. 

 P. pallipes Lep. Bar Harbor (Br.) Aug. 23. 



Pachynematus Konow 



P. corniger Nort. Echo Lake; Seal Cove; Bar Harbor, 

 June 20-Aug. 18. 



PlCKONEMA ROSS 



P. alaskensis Roh. Bar Harbor on spruce, August. 

 P. dimmockii Cress. Larvae on spruce. 



Pteronidea Rohwer 



P. mendica Walsh. S. W. Harbor, Sept. 5 (Alexander). 



P. odorata Dyar. Bar Harbor (Br.) June 14. 



P. populi Marlatt. Occurs on poplar. 



P. ribesii Scop. On currants, as name indicates, July 15. 



P. similaris Nort. S. W. Harbor, June 11. 



P. tricolor Marlatt. Bar Harbor, July 27. 



PONTANIA Costa 



P. sp. S. W. Harbor, July 11. 



Euura Newman 



E. ovum Walsh. Willow Egg-gall. Echo Lake, July 12. The 

 larvae form egg-shaped galls on the twigs of willow. 



E. pisum Walsh. S. W. Harbor, July 11. The larvae form 

 snbsphaerical galls on the under side of the leaves of willow. 



E. pomum Walsh. Willow apple gall. Bar Harbor; Salis- 

 bury Cove (Sanford). The larvae form galls on the leaves 

 of willow. 



