98 BIOLOGICAL SI'liVKV OF 



Arms Linnaeus 



A. cbbasifoliae Fitch. This black chokecherry form was 

 taken June 17 on crumpled Leaves at Penikese. 



A. maidis Pitch. The corn leaf from. Smoky black. Bar Har- 

 bor, Aug. 1 . 



A. bumicis Linn. Feeds on a great variety of vegetation. 

 Taken on poplar tip, July 2. Corfield. 



A. sp. Pretty Marsh massed on fire weed (Epilobrium), 



Aug. 25. 



MtZUS Passerini 



M. persicae Sulzer. A general feeder. Sal. Cove on holly- 

 hock. 



Capitophorus Vander Goot 



C. eibis Linn. On leaves of currant. Sec. 40. June 19. 



Phordon Passerini 



P. humuli Schrank. The Hop Aphid. Hop vines, Penikese, 

 Aug. 20. 



Macrosiphum Passerini 



M. albifroxs Essig. Massed on lupin Eagle Lake, July 2. 

 M. euphorbiae Thomas. On aster and Rosa rugosa Duck Br. 



June 21 and Town Hill on Spirea tomentosa Aug. 5. Known 



as Potato Ahpid. 

 M. pisi Kalt. Eagle Lake massed on stem of lupin July 13 



and Barn Eyrie on aster Aug. 1. This species is sometimes 



confused with the one above. 

 M. rudbeckiab Fitch. Center of yellow daisy RudbeckiaMrta 



Aug. 5. Foot Newport Mt. on Aster and Solidago, Sept. 18. 



Eriosoma Leach 



E. American i.M Riley. Causes leaf roll on American elm 

 and tben migrates to Amelanchier the roots of which harbor 



the summer generations. From elms, July 1-10. 



