262 
BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
1887. [Riley, C. V.] The use of poisons to destroy insects. <Farraer’s 
Review, 23 September, 1880, v. 5, p. 200. S.-b. No. 23, pp. 
148-149; 165-166. Reprint: <Amer. Ent., October, 1880 [v. 
3], u. s., v. 1, p. 244, 
Advocacy of the use of Paris green and London purple as means against cer¬ 
tain insects ; danger of the use of the same against many insects; criticism 
of A. J. Cook’s recommendation for their use against Paria aterrima and 
Carpocapsa pomonella ; limitations within which they may be used. 
1888. [Riley, 0. V.] Supplementary instructions to agents of the 
United States Entomological Commission. <Amer. Ent., Sep¬ 
tember, 1880 [v. 3], n. s., v. 1, p. 218. 
Call for experiments to ascertain the minimum quantity of poisons which can 
be used effectually against Aletia argillacea \_=xylina']', effect of poisons 
on the several stages of this insect; food-plants, parasites, and enemies of 
the same ; effect of yeast ferment upon it. 
1889. Riley, C. V. Dimorphism in locusts (Acrididce). <Amer. Ent., 
September, 1880 [v. 3], n. s., v. 1, pp. 219-220. 
Review of paper by S. H. Scudder ; certain forms described as species of 
Pezotettix are dimorphic forms of Caloptenus ; extract from 8th Ann. Rept. 
State Ent. Mo., 1876, p. 115. 
1890. [Riley, C. V.] A scale insect on maple hitherto unobserved by 
American entomologists. <Amer. Ent., September, 1880 [v. 
3], n. s., v. 1, pp. 220-221. 
Notice of paper by Miss E. A. Smith, with emended reprint of a portion of the 
same; habits, colors, and behavior of young larvae and transformations of 
the male of Pseudococcus aceris. 
1891. [Riley, C. V.] How flight in insects is directed. <Amer. Ent., 
September, 1880 [v. 3], n. s., v. 1, p. 221. 
Abstract of paper by Jousset de Bellesme; direction of flight not determined 
by the motion of the wings, but principally by the displacement of the 
center of gravity, resulting from the changes offlposition of other parts of 
the body. 
1892. [Riley, O. V.] Entomological work at the Department of Agri¬ 
culture. <Amer. Ent., September, 1880 [v. 3], n. s., v. 1, p. 222. 
Notice of the continuation of the appropriations by Congress for field-work 
and experiments in the entomological division of the U. S. Department of 
Agriculture. 
1 893. [Riley, C. Y.J Entomological papers read before the A. A. A. S. 
<Amer. Ent., September, 1880 [v. 3], n. s., v. 1, p. 223. 
Titles of twenty-eight [28] papers read at the Boston meeting. 
1894. [Riley, C. V.] Entomologists at Boston. <Amer. Ent., Sep¬ 
tember, 1880 [v. 3J, n. s., v. 1, p. 223. 
Notice of the 29th meeting of the A. A. A. S. at Boston, August-September, 
1880. 
1895. Riley, O. V. Winged Phylloxera in California. <Amer. Ent., 
September, 1880 [v. 3], n. s., v. 1, pp. 224-225. 
Letter from J. S. Hyde, with remarks; extracts from papers by E. W. Hil- 
gard ; winged fertile females of* Phylloxera vastairix found in California; 
local evidence of the spread of this insect; means of eradicating the same. 
