KANSAS UNIVERSITY QUARTERLY. 
4S 
Salix nigra, Cooley, Spec. Bull. Mass. Agr. Col., p. 21, Aug. 1899. 
Cornus pubescens, ibid. 
Cornus asperifoUa, ibid. 
Balm of Gilead, ibid. 
Russian poplar, ibid. 
Liriodendron tulipifera, ibid. 
Cornus stolonifera, ibid. 
Cornus sericea, ibid. 
Ceanothus, ibid. 
Amelanchier canadensis, ibid. 
Chionaspis amevicaua Johns. 
Ulmus americana (Johns.), Ckll., Proc. Nat. M., XIX, p. 765. 
Chionaspis platani Cooley. 
Sycamore (Parrott), Cooley, Spec. Bull. Hatch Exp. Sta., Aug. 1899, p. .36. 
Chionaspis pinifolia’ Fitch. 
Pine, Comat., 2d Corn. Rept., p. 140, 1880. 
Firs and spruces, Gillette and Baker, Hemiptera of Colorado, p. 129. 
Pinus strobus, Cooley, Spec. Bull. Hatch Exp. Sta., Aug. 1899, p. .33. 
Pinus resinosa, ibid. 
Pinus excelsa, ibid. 
Pinus niitis, ibid. 
Pinus cembra, ibid. 
Pinus pgrenaica, ibid. 
Pinus laricis, ibid. 
Pinus sylvesiris, ibid. 
Pinus austriaca, ibid. 
Pinus punilio, ibid. 
Pseudolsuga taxifoUa, ibid. 
Abies excelsa, ibid. 
Abies nigra, ibid. 
Abies alba, ibid. 
Pulrina ria inn ntnefabilis Rathv. 
Tilia sp., Ckll., Proc. Nat. M., XIX, p. 730. 
Puonynius (Riley), Ckll., Proc. Nat. M., XIX, p. 7.31. 
I'tfis ineonstans, also on wild grape, Ckll., Proc. Nat. M., XIX, p. 735. 
Sycamore (Riley), Ckll., ibid., p. 7.36. 
Rosa sp., Riley, Rept. Dept. Agr., 1881. 
Garden currants, Ribes rubrum and Riley, Rept. Dept. Agr., 1884. 
Fi-axinus nigra (Sambricifolia), Mundt, Can. Ent.,1884, p. 240. 
Poplars, Populus balsamifera, ibid. 
Mulberry, Morus rubra, ibid. 
Oak, Q,uercus sp., Riley, Rept. Dept. Agr., 1881. 
White elm, Ulmus americana Hunter, Q. U. Quart., IX, No. 12, p. 104. 
Black walnut, Juglans nigra, ibid. 
Maple, ibid. 
Silver maple, Putnam, Dav. Acad. Nat. Sci., p. 294. 
Beech, ibid. 
Sugar maple, ibid. 
Box-elder, ibid., p. .338. 
