306 
BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
2200. Riley, C. V. Emulsions of petroleum and their value as insect¬ 
icides. <Proc. Amer. Assoc. Adv. Sci. for 1882, 1883, v. 31, 
pp. 469-470. Separate: <Salem, Mass., July, 1883, pp. 469-470. 
Reprint: <Kansas City Rev. of Science and Industry, Novem¬ 
ber, 1883, v. 7, pp. 447-448. S.-b. No. 42, p. 124. Extract: 
<Sci. Amer., 19 November, 1883, v. 49, p. 294. S.-b. No. 51, p. 
153. 
Description of inodes of making emulsions of petroleum for use against 
insects. 
2201. [Riley, C. V.] The old, old question of species. <Amer. Nat., 
September [15 August], 1883, v. 17, p. 975. 
Comments upon the discussion between H. A. Hagen and W. H. Edwards; 
views of both parties extreme ; views as to the true nature of species. 
2202. [Riley, C. V.] Myrmecophila. <Amer. Nat., September [15 Au¬ 
gust], 1883, v. 17, pp. 975-976. 
Record of recent captures of Myrmecophila in Oregon and District of Colum¬ 
bia ; record of former captures in the United States; habits of the genus. 
2203. [Riley^, C. V.] Salt-water insects used as food. <Amer. Nat., 
September [15 August], 1883, v. 17, pp. 976-977. 
Occurrence of Ephydra (Mans ?) in Lake Tetscoco, Mexico ; E. gracilis found in 
Great Salt Lake, Utah, and E. californica in lakes in California; account 
by W. H. Brewer of the manner in which the last-named species is collected 
and used for food by the Indiaus living near Mono Lake. 
2204. [Riley, O. V.] Food-plants of Sarnia cynthia. <Amer. Nat., 
September [15 August], 1883, v. 17, p. 977. 
Review of paper of H. H. Birney ; list of plants on which Sarnia [—Altadis'] 
cynthia has hitherto been found feeding; some of these are the favorite 
food-plants of Callosamia [= Attacus] promethea. 
2205. [Riley, C. Y.] Bitten by an aphid? <Amer. Nat., September 
[15 August], 1883, v. 17, p. 977. 
Letter of S. Swan, with answer; Siplionophora [= Nectar ophor a] radbeckice com¬ 
mon on Solidago and Budbeckia ; the biting was probably caused by ants Or 
some other insect that escaped notice at the time. 
2206. Riley, C. Y. Steganoptycha claypoleana. <Amer. Nat., Sep¬ 
tember [15 August], 1883, v. 17, p. 978. Reprint: <Papilio, 
September-December, 1883, v. 3, p. 193. 
Comparative description of Steganoptycha claypoleana with Proteoteras cescu- 
lanum ; habits of the former. 
2207. R[iley], C. Y. Extermination and restriction of Phylloxera in 
Switzerland. <Rura*l New-Yorker, 25 August, 1883, v. 42. 
S.-b. No. 49, p. 74. 
Notice of report of Valery-Mayet. 
2208. Riley, C. Y. Hackberry psyllid galls. <Ca. Ent., August [5 
September], 1883, v. 15, pp. 157-159, figs. 6, 7. 
Critical review of paper pf T. W. Fyles ; Phylloxera vastatrix has many para¬ 
sites and Celtis is attacked by many species of gall-insects; characters of 
Pachypsylla n. g. [p. 157] ; figures of galls of P. celtidis-venusta and P. 
c.-mamma ; derivation and orthography of the generic term Celtis. 
