BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
141 
2122. Riley, C. Y. Burning the stubble for Hessian Hies. <lnsect 
Life, y. 1, March, 1889, p. 294. 
2123. Riley, 0. Y. Additional note on the Megilla parasite. <Insect 
Life, v. 1, May, 1889, pp. 338-339. 
Description of Perilitus americanus. 
2124. Riley, C. Y. Locusts in Algeria. <Insect Life, v. 2, August, 
1889, pp. 59-60. 
2125. Riley, C. A". The intentional importation of parasites. <Sci. 
Arner. Supplement, 21 September, 1889, p. 11445. 
2126. Riley, C. Y. Some insect pests of the household. <InsectLife, 
v. 2, October, 1889, pp. 104-108, 3 figs.; November, 1889, pp. 
127-130, 1 tig.; January-February, 1890, pp. 211-215, 4 figs.; 
March, 1890, pp. 266-269,1 fig. 
2127. Riley, O. Y. Report of the entomologist for the year 1888. 
<Rept. Com. Agric., 1889, pp. 53-114, 12 pis. 
Articles on the fluted scale, the hop plant-louse, and the plum curculio. 
2128. Riley, C. Y. The plum curculio, arsenical sprays, Wier’s wild 
plum immunity theory. <Proc. 22d Sess. Amer. Pomol. Soc., 
1889, p. 31. 
2129. Riley, C. Y. Improved method of using the gas treatment for 
scale insects. <Calif. Fruit Grower, 15 February, 1890, p. 100. 
2130. Riley, O. Y. The six-spotted mite of the orange. <Insect Life, 
v. 2, January-February, 1890, pp. 225-226,1 fig. 
Description of Tetranychus sex-maculatus. 
2131. Riley, C. Y. An Australian hymenopterous parasite of the 
fluted scale. <Insect Life, v. 2, January-February, 1890, pp. 
248-249,1 fig. 
Description of Ophelosia crawfordi. 
2132. Riley, C. Y. Gas treatment for scale insects. <Pacific Rural 
Press, 8 March, 1890, p. 261. 
2133. Riley, C. Y. The rose chafer. <Insect Life, v. 2, April, 1890, 
pp. 295-302, 2 figs. 
A detailed account of Macrodactylus subspinosus. 
2134. Riley, C. Y. The outlook for economic entomology. <Indiana 
Farmer, 5 July; 12 July, 1890. 
2135. Riley, C. Y. Insects injurious to the hackberry. <Fiftli Rept. 
U. S. Entom. Com., 1890, pp. 601-622, 8 figs. 
2136. Riley, C. V. Report of the entomologist for the year 1889. 
<Ann. Rept. Dept. Agric. for the year 1889 (1890), pp. 331-360, 
6 pis. 
Treats of the fluted scale, the six-spotted mite of the orange, the horn fly, 
and the grain aphis. 
2137. Riley', C. Y. The outlook for applied entomology. <Insect 
Life, v. 3, January, 1891, pp. 181-210. 
Address of the President at Second Ann. Meet. Assn. Econ. Entom. 1890. 
