I 



BIBLIOGRAPHY OF U. S. NATIONAL MUSKUM. 359 



CHARLES VALENTINE RILEY. 



Recent outbreaks of the ArHiy-wonu. 



(Rural New Yorker, 43, Jan. 12, 1884, p. 19.) 



Rare occurrence of Leucaiiia uiiipuncta in 1882 aud 18B3, followiug its last 

 abuiiilant occurrence in 1881 ; occurrence of tlie larvaj ut Eaat Windsor, Vt., 

 in June, 188:?. 



Recent advances in economic entomology. 



(Proc. Pbilos. Soc.Wasli., vii, 1884, pp. 10-12.) 

 Separate, without title-page [Wash., 1884], pp. 10-12. 8vo. 

 Abstract of conmiuuication made to Philosopliical Society of Wasliington, 

 February 2, 1884; characteristics of economic entomology as a science, and 

 difliculties of its prosecution ; n)ention of chief insecticide substances, and 

 discHssiou of their ai)plicability ; notice of recent progress in mechanical 

 appliances. 



Tribute to the memory of John Lawrence Leconte. 



(Psyche, 4, Nov.— Dec, 1883 [Feb. 11, 1884], pp. 107-110.) 



Separate : without title-page [Cambridge, Mass., Feb., 11, 1884], pp. 107- 

 110. 8vo. 



Notice. Psyche, ut cit., ]>. 110. 



Biograi>hical notice of J. L. Leconte, b. May 13, 1825, d. Nov., 15, 1883; 

 amount, character, and importance of Lecoute's work and writings ; his per- 

 sonal character; his relations with G. H. Horn ; disposition of his entomo- 

 logical collection. 



General truths in applied entomology. Essay. 



(Trans. Georgia State Agric. Soc, 1884, pp. 153-159.) 

 General truths in applied Entomology; being a paper read before the 

 Georgia State Agricultural Society, at Savannah, Ga., February 

 12, 1884, by Charles V. Riley, Ph. D., United States Entomologist. 

 Extracted from the Transactions of Georgia State Agricultural 

 Society, 1884. With title-page and cover: pp. 153-159. 8vo. 



Importance of insects and of the stndy of economic entomology ; causes of 

 the destructive prevalence aud amount of the ravages of insects in Nortli 

 America : complicated nature of the problem which the economic entomolo- 

 gist has to solve; mention of the principal insecticide substances in nse now 

 and formerly ; special availability of several of these substances for certain 

 purposes; transcendent importance of arsenical sub.stances (arsenic, Paris 

 green and London purple), petroleum and pyrethrum for insecticide purposes; 

 methods of preparation and u»;e of these latter substances; specific action of 

 pyrethrum powder, its etiect on higher animals, and probable use in medicine 

 and as a disinfectant ; petroleum emulsions against Phi/loxera vastatrix; 

 mechanical devices for spraying liquid insecticides. 



The Army-worm, Leucania unipimcta^ Haw. 



(3d Rep. U.S. Entom. Com., 1883 [March 1884], pp. 89-156, pi. 1-2 ; cxpl, 

 of pi. on p. 2 of ex pi. of pi.) 



The Army-worm ; being an account of its history and injuries in the 

 United States up to the year 1883, with practical recommendations. 

 Author's edition. 



(Extracted from the Third Report of the United States Entomological Com- 

 mlBsion, 1883. Washington, March, 1884, pp. 89-150, pi. 1-2. 8 vo.) 



