BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 281 



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 iu 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 Phytonomns punctatus at Barrington, N*. 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 18dl. 



2012. [RiLEY, C.Y.] 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. V.] 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. V. The periodical Cicada. <Amer. Agric., August, 



1881, v. 40, p. 132, 5 figs. S.-b. No. 23, p. 141. 



Brief sketch of the natural history of Cicada r=Ti&ice] septendecim and C. 

 [= T.] tredecim, with figures of all stages and of punctured twigs; the re- 

 puted stinging by these insects probably done by Stiziis grandis \_=Spheciu8 

 speciosus] ; figure of the Stizua; recommends the substitution of the name 

 "periodical Cicada" in place of the name "locust." 



2015. RILEY, C. V. Entomological notes. <Farmer's Review, 22 Sep- 



tember, 1881. S.-b. No. 42, pp. 54-55. Reprint: <Amer.Nat., 

 [3] December, 1881, 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-Andre" ; attempted explana- 

 tion of the immunity of grape- vines in sandy soil from the ravages of Phyl- 

 loxera vastatrix, 



2016. RILEY, C. V. 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. V.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 Aphididas, 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. V.] 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. 



