THE MOUNT DESERT REGION 85 



Trioza Foerster 



T, TRiPUNCTATA (Fitcli). Common at the foot of Western Mt., 

 July to Sept. The nymphs are gregarious on the under side 

 of the terminal leaves of the blackberry, causing them to 

 curl and form rosette-like bunches. 



PsYLLA Geoffroy 



P. ANNULATA Fitch. 'Mt. Dcscrt,' July 30 (McAtee). The 



nymphs live on maple. 

 P. FLOccosA Patch. 'Mt. Desert,' July 30 (McAtee). The 



nymphs live on the growing twigs of alder. 

 P. cARPiNicoLA Crawf . Salisbury Cove ; S. AV. Harbor, July 



15-Aug. 30. 

 P. TRiMACULATA Crawf. Salisbury Cove; S. W. Harbor, July 



15-Aug. 30. 

 P. GALEAFORMis Patcli. The nymphal stages are passed on 



alder (Aldus). Section 26; Station F179, Aug. 7-24. 

 P. QUARRiLiNEATA Fitch. Station F241, April 21. 

 P. STRIATA Patch. Station F179, Aug. 24. 



Aphididae. Plant-lice 

 Eriosoma Leach 



E. LANiGERUM Hausm. Woolly aphid. Bar Harbor. The 

 brood from the over-wintering eggs form the leaf clusters 

 knoM^i as 'rosettes' on the elm, then migrate to the apple 

 and thorn, and return to the elm in the fall. 



Prociphilus Koch 



P. TESSELLATA Fitcli. Woolly aider aphid. ]\Iigrates between 

 the maple and alder. 



Melaphis Walsh 



M. RHois Fitch. Large rounded galls on the leaves of the 

 staghorn sumach. 'Mt. Desert' (J. G. Jack). 



