108 KANSAS UNIVERSITY QUARTERLY. 



tween the scale-insects and their respective hosts. 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 : 



Aspidiotus forhesi Johns. 

 Honey-locust, Olcditschia (ricatithos {Johns.), Ckll., Proc. Nat. M., XIX, p. 738. 

 Peach, Pi anus, Ckll., ibid., p. 740. 



Apricot, Primus armeniaca, Johns., Ent. News, p. 151 (1896). 

 Garden currant, Ribes rubrum, 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, Amygdalus 2')ersiea, Leonard!, Riv. di Pat. Veg., 



p. 43(1897). 

 Acer fro xinns, ibid. 

 Staphylea trifoliata, ibid. 



Asindiottis ancylus Putnam. 

 Linden, Comstock, 2d Corn. Univ. Kept., p. 140. 

 Box-elder, Negundo sp., Ckll., Proc. Nat. M., XIX, p. 735. 

 Apricot, PruniiH armeniacum, Ckll., Proc. Nat. M., XIX, p. 741. 

 Plum, Prunus do^nestica, in Santa Fe, 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 verficUtata, Felt., Bull. N. Y. Mus., VI, No. 31, p. G17 (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. 



Gteditschia tricanthos, Ann. Mag. Nat. Hist., p. 323 (1898). 

 Quercus ivrightU, 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 Canadian Entomologist have no dale marks. It has been, therefore, 

 impos-sible to locate accurately all references as to recent numbers of this magazine, since the 

 department numbers are at the bindery. 



