298 
BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
2121. [Riley, C.Y.] A butterfly larva injurious to pine-trees. <Amer. 
Nat., [2] December, 1882, v. 16, pp. 1015-1010. 
Habits and ravages of Pieris menapia on yellow-pine and tamarack in Wash¬ 
ington Territory. 
2122. [Riley, C. V.] The army-worm in 1882. <Amer. Nat., [2] De¬ 
cember, 1882, v. 16, p. 1017. 
Occurrence of Leucania unipuncta in great abundance and with disastrous 
effects, especially in southern United States in 1882. 
2123. [Riley, 0. V.] The wheat-stalk worm on the Pacific coast. 
<Amer. Nat., [2] December, 1882, v. 16, pp. 1017-1018. 
Isosoma tritici injuring wheat-stalks in Washington Territory; reference to 
prior notices of this insect. 
2124. [Riley, C. V.] Deserved honor. <Amer. Nat., [2] December, 
1882, v. 16, p. 1018. 
Notice of the appointment of Eleanor A. Ormerod to be consulting entomolo¬ 
gist to the Royal Agricultural Society of Great Britain. 
2125. [Riley, C. V.] Important work on Cynipidce. <Amer. Nat., [2] 
December, 1882, v. 16, p. 1018. 
Notice of G. Mayr’s “ Die europiiischen Arten der gallenbewohnenden Cyni. 
piden.” 
2126. Riley, C. Y. Emulsions of petroleum aud their value as insecti¬ 
cides. <Rural New Yorker, 9 December, 1882, v. 41, pp. 833, 
834. S.-b. No. 42, pp. 17-18. 
Results of experiments made upon methods of using petroleum as an insecti¬ 
cide without injury to plants; soap and milk emulsions the most available; 
methods of preparing the same. 
2127. Riley, O. Y. The bean-weevil. <Rural New Yorker, 9 Decem¬ 
ber, 1882, v. 41, p. 835. S.-b. No. 42, p. 18. 
Answer to inquiry of R. J. B.; habits of and means against Bruchus fabce. 
2128. Riley, C. Y. The “ cluster-fly.” <Prairie Farmer, 23 Decem¬ 
ber, 1882, v. 54, p. 7. S.-b. No. 42, pp. 16-17. Reprint: <Amer. 
Nat., [5] January, 1883, v. 17, pp. 82-83. 
Habits and synonymy of Pollenia rudis ; notice of other accounts of the swarm¬ 
ing of Diptera. See No. 2174. 
2129. Riley, C. Y. Darwin’s work in entomology. <Proc. Biol. Soc. 
Wash., 1882, v. 1, pp. 70-80. 
Analysis of the interest shown by C. R. Darwin in entomology and of his 
contributions to the same. 
2130. Riley, O. Y. The cotton-worm. <Western Farmer’s Almanac 
for 1883, 1882, p. 40. S.-b. No. 42, p. 71. 
Various theories hitherto held in regard to the hibernation of Alelia argillacea 
[^=xylina'] proof of its hibernation; seasons and conditions of develop¬ 
ment of the first brood of the year, precautionary measures to be adopted. 
2131. Riley, C. Y. Pyretbrum, an important insecticide. <Western 
Farmer’s Almanac for 1883, 1882, pp. 41-42. S.-b. No. 42, p. 49. 
See: <Prairie Farmer, 27 January, 1883. S.-b.No.42,pp. 56-58. 
Condensed account of the history of the use of pyrethrum flowers as an in¬ 
secticide; cultivation of the plants and preparation of the powder ; meth¬ 
ods of its application ; experiments in the cultivation of the plants. 
