•PS KANSAS UNIVERSITY QUARTERLY. 
r'S*. 
tween the scale-insects and their respectivt^ftsts. A study of the 
food-plants, therefore, of the scale-insects, becomes a matter of con- 
siderable importance in determining the continuation of a species and 
the possibilities of its numerical increase. The insects herein dis- 
cussed have been found on certain food-plants in Kansas. They have 
likewise been found by other authorities on other food-plants in other 
parts of the globe. A record of each of these discoveries is given in 
the following pages : 
Aspuliotus forheni Johns. 
Honey-locust, Oleditschia tricanthos (Johns.), Ckll., Proc. Nat. M., XIX, p. 738. 
Peach, Prunus, Okll., ibid., p. 740. 
Apricot, Prunus urmeniacH, Johns., Ent. News, p. 151 (1896). 
Garden currant, Ribes ruhrum, ibid. 
Ash, Osborn, Proc. Iowa Acad. Sci., p. 229 (1897). 
Crab-apple, Hunter, K. U. Quart., VIII., No. 1, p. 4 (Jan. 1899). 
Pear, Johns., 111. Sta. Lab. Nat. Hist., IV, p. 381. 
Plum, ibid. 
Apple, ibid. 
Quince, ibid. 
Currant, ibid. 
Wild and cultivated cherry, Ainygdalus persica, Leonard!, Riv. di Pat. Veg., 
p. 43 (1897). 
Acer fraxinns, ibid. 
Staphjjlea Irifoliata, ibid. 
Aspidiotus ancj/ltts Putnam. 
Linden, Comstock, 2d Corn. Univ. Kept., p. 140. 
Box-elder, Negundo sp., Ckll., Proc. Nat. M., XIX, p. 735. 
-Apricot, Prunus armeniacum, Ckll., Proc. Nat. M., XIX, p. 741. 
Plum, Prunus dornestiea, in Santa F^, N. M.. Ckll., ibid. 
Black currant, Ribes sp., Ckll., -Am. Nat., p. 731 (1895). 
Oaks, Comstock, 2d Corn. Univ. Kept., p. 140. 
Beech, ibid., p. 139. 
Water locust, ibid., p. 140. 
Ilex verticiUata, Felt., Bull. N. Y. Mus., VI, No. 31, p. 617 (1900). 
Hemlock, ibid. 
Mountain ash, ibid. 
Willow, Felt., Bull. N. Y. Mus., V, No. 23, p. 261 (1898). 
-Apple, ibid. 
Elm, ibid. 
Pear, Gillette and Baker, Colo. Agr. Exp. Sta., Bull. 31, Tech. Ser., No. 1, p. 128. 
Black maple, Newell, Cont. Iowa St. Col. Agr., No. 3, p. 8. 
Birch, ibid. 
Snowball, ibid. 
Oleditschia tricanthos, -Ann. Mag. Nat. Hist., p. 323 (1898). 
Quercus wrightii, Ckll., Can. Ent., vol. 28, p. 226 (1896). 
Cottonwood, Gillette, Colo. Agr. Col. Ex. Sta., Bull. No. ,38, 1898, p. 36. 
Spirea amicus, King, Can. Ent., p. 226, vol. — .♦ 
*The separates of the CanadiaD Eutoinolugist have no dale marks. It has been, therefore, 
impo.'-sible to locate accurately all references as to recent numbers of this magazine, since the 
department numbers, are at the bindery. 
