PLATE VIII. Aphididae. 



i. Macrosiphum rudbeckiae Fitch, x i. 



2. Macrosiphum solanifolii Ashmead, — potato aphid, x i. 



3. Eriosoma lanigerum Hausman, — woolly apple aphid, x 1. 



4. Prociphilus tessellata Fitch, x 1. 



5. Cherme.s pinicorticis Fitch, — pine bark aphid, x 1. 



6. Chermes strobilobius Kaltenbach, — woolly larch aphid, x I, 



Photographs by B. H. Walden. 



