THE MOUNT DESERT REGION 121 



Cryptorhynchus Illiger 



C. LAPATHi Linn. 'Willow. Borer.' Seal Harbor, Aug. (Stow- 

 ell). Introduced from Europe and injurious to willows. 



Sphenophorus Sclionherr 



S. cosTiPENNis Horn. Meadow. Salisbury Cove, July 14. 

 ScoLYTiDAE. Bark beetles 



POLYGRAPHUS Erichson 



p. RUFiPENNis Kby. Spruce bark-beetle. N. E. Harbor; 

 S. W. Harbor, June. Infests dying or felled spruce. 



Gnathotrichus Eichhoff 



E. MATERiARius Fitcli. ' Piue wood-stainer.' Bar Harbor, 

 June 16. Excavates galleries in the sapwood and heart- 

 wood of dying or recently felled pine and spruce. 



PiTYOPHTHORUS Eichlioff 



P. PULiCARius Zimm. 'Mt. Desert Island, Aug. 19, 1919, from 



white pine twigs' (M. W. Blackman). 

 P. BiovALis Blackman. 'Mt. Desert Island, Aug. 19, 1919, 



from white pine twigs' (M. W. Blackman). 



PiTYOGENES Bedel 



p. HOPKiNSi Sw. Bar Harbor, June 7. 



Ips De Geer (Tomicus Latreille) 



I. piNi Say. Pine bark-beetle. Wood Lake, Aug. 8 (Sanford). 



Orthotomicus Ferrari 



0. CAELATus Eich. Wood Lake, Aug. 8 (Sanford). Infests 

 pine and spruce. 



Dryocoetus Eichhoff 



D. AMERicANus Hopk. Loug Poud, July 16. 



Order HYMENOPTERA 



Symphyta. Sawflies and horn-tails 



Pamphilidae. Leaf-rolling sawflies 



Itycorsia Konow 



1. PULLATA Cress. X. E. Harbor, Aug. 10 (Minot). 



