BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
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2009. [Riley, C. V.] The genuine army-worm in the West. <Amer. 
Nat., September [23 August], 1881, v. 15, p. 750. 
Occurrence and ravages of Leucania unipuncta in Illinois and Indiana in 
1881; these larvae either from eggs of hibernated moths or of a second brood; 
other insects mistaken for this in other States; periods of the Leucania and 
influence of the seasons upon it. 
2010. [Riley, C. V.] A new imported enemy to clover. <Amer. Nat., 
September [23 August], 1881, v. 15, pp. 750-751. 
Clover injured by Phytonomus punctatm at Barrington, 1?. Y., in July, 1881. 
2011. [Riley, C. V.] Another enemy of the rice-plant. <Amer. Nat., 
September [23 August], 1881, v. 15, p. 751. 
Rice-plants injured by the larva of Laphygma frugiperda in Georgia in the 
summer of 1881. 
2012. [Riley, C. V.] Canker-worms. <Amer. Nat., September [23 Au¬ 
gust], 1881, v. 15, p. 751. 
Excessive ravages of Paleacrita vernata in Tazewell County, Illinois, in 1881. 
2013. [Riley, C.Y.] Lepidopterological notes. <Amer. Nat., Septem¬ 
ber [23 August], 1881, v. 15, pp. 751-752. 
Advance extract from Bull. No. 6, U. S. Entomological Commission, pp. 55- 
56. See No. 2026 for synopsis of contents. 
2014. Riley, C. Y. The periodical Cicada. <Amer. Agric., August, 
1881, r. 40, p. 132, 5 figs. S.-b. No. 23, p. 141. 
Brief sketch of the natural history of Cicada f = Tibicen] septendecim and C. 
[= T.] tredecim, with figures of all stages and of punctured twigs; the re¬ 
puted stinging by these insects probably done by Stizus grandis [ = Sphecius 
speciosus'] ; figure of the Stizus ; recommends the substitution of the name 
“periodical Cicada” in place of the name “locust.” 
2015. Riley, C. Y. Entomological notes. <Farmer’s Review, 22 Sep¬ 
tember, 1881. S.-b. No. 42, pp. 54-55. Reprint: < Amer. Nat., 
[3] December, 18S1, v. 15, pp. 1012-1013. See : <Sci. Amer., 11 
February, 1882^ S.-b. No. 38, p. 1£. 
Abstract and critical review of paper by M. Saint-Andr6; attempted explana¬ 
tion of the immunity of grape-vines in sandy soil from the ravages of Phyl¬ 
loxera va8tatrix. 
2016. Riley^, C. Y. Notes on Hydrophilus triangularis. <Amer. Nat., 
October [23 September], 1881, v. 15, pp. 814-817, figs. 1-2. 
Description and figures of egg-case and figures of eggs and of male imago, 
with structural details of Hydrophilus triangularis ; characters and life-his¬ 
tory of the larva and pupa; figures of eggs, egg-case, larva, and pupa of 
H. piceus of Europe. 
2017. [Riley, C. Y.J Migration of plant-lice from one plant to another. 
<Amer. Nat., October [23 September], 1881, v. 15, pp. 819-820. 
Exposition of J. Lichtenstein’s theory that most Aphididw, especially gall¬ 
making Pemphigini, live upon two different plants in passing through their 
cycle of development; cites instances in which the host-plants are of differ¬ 
ent families. 
2018. [Riley, C. Y.] The chinch-bug. <Amer. Nat., October [23 Sep¬ 
tember], 1881, v. 15, pp. 820-821. 
The abundance of Blissus leucopterus is connected with the moisture of the 
season ; extraordinary noxiousness of this insect in the dry season of 1881 
in various parts of the United States. 
