584 REPORT OP NATIONAL MUSEUM, 1887. 



Charles V. Riley— Continued. 



Contains : Letter of submittal. Experiments with Insecticides, giving an explanation of 

 reasons for having a variety of substances tested, and methods employed. Opinions on the 

 value of some of them. Report of experiments at Lafayette, Indiana, by F. M. Webster. 

 Gives the results of eighty -five experiments on twelve species of insects. Keport of Experi- 

 ments at Ames, Iowa, by Prof. Herbert Osborn. Gives the results of experiments with eleven 

 different mixtures. Report of Experiments at Trenton, New Jersey, by Thomas Bennett. 

 Gives the results of experiments with decoctions of Datura stramonium, Lycopersicum escu- 

 lentum, Sambucua, AUanthus, Podophyllum, Peltatum, and Tanacetum. 



Charles V. Riley. Miscellaneous notes on the work of the Division of Entomol- 

 ogy for the season of 1885, prepared by the Entomologist. With illustrations. 



Bull. No. 12, TT. S. Department of Agriculture, Division of Entomology, pp. 1-46, pi. i. 



Contains notes of some of the work done under the direction of the Entomologist during the 

 time mentioned, and special reports, as follows : Production and Manufacture of Buhach, by 

 D. "W". Coquillett. Additions to the Third Beport on the causes of the destruction of the Ever- 

 green and other Forest Insects in northern New England, by A. S. Packard. The Periodical 

 Cicada in southeaastern Indiana, by Amos "W". Butler, and Notes of the Year. These notes 

 contain items of information regarding "The Colorado Potato Beetle in Georgia," " The Sugar- 

 cane Beetle Injuring Corn," " The Corn-root "Web-worm, an old pest in Indiana," " Monephora 

 bicincta damaging Bermuda Grass," "A new Enemy to the Persimmon," The Black Scale of 

 California," "The Black Scale of California found in South Carolina, " "Bibio albipennis&s&n 

 injurious Insect," "An Enemy to Silk Worms," Great Damage to Beans by Blister Beetles," 

 "Anthomyia angustifrons, a lignivorous Insect," "The Tile-horned Prionus in Prairie Land," 

 " The Clover-seed Midge in Wisconsin," " Colaspis flavida injuring the LeConte Pear," "Great 

 Damage by the Cottonwood Borer," "Leptocoris trivittata injuring Apples," "Proconia undata 

 in injurious numbers," "Occurrences of the Army Worm during the Season," "California 

 Remedies for the Woolly Aphis," "The Hessian Fly in California," "Agonoderus paUipe$ in- 

 jurious to Corn." 



Charles V. Riley. Mr. Hulst's Observations on Pronuba yuccasella. 



Entomologica Americana, II, March, 1887, pp. 233-236. 



Criticises Mr. Hulst's observations, p. 184, same volume, to the effect that yucca may be 

 fertilized by other insects than P. yuccasella. Gives a history of his work on the subject, and 

 details the reasons for his conclusions ; also cites the admitted exceptions to the rule as given 

 by him. Discredits Mr. Hulst's conclusions as unsupported by facts. 



Charles V. Riley. Showers of Sulphur ; Pine Pollen. 



The Evening Star, Washington, March 9, 1887. 



Refers to the recent reports of supposed sulphur showers, and states that they consist of the 

 pollen of Pinus longifolia, citing other similar instances in previous years. 



Charles V. Riley. Remarks on the Insect Defoliators of our Shade Trees, made by 

 Dr. C. V. Riley, IT. S. Entomologist. Stenographic report by James W. Tooley 

 of an address before the New York Farmers, at a meeting held March 10, 1887. 

 Printed by the Qlobe Stationery and Printing Co., N. T., 1887. 



Prelude: Imported and native injurious insects. Speaks of the Imported Elm Leaf -beetle 

 (Qaleruea xanthomelcena), the Bag- worm (Thyridopteryx ephemerceformis), the White-marked 

 Tussock-moth {Orgyia leucostigma), and the Fall Web- worm (Hyphantria cunea). Gives a 

 brief popular history of each species, their method of injury, the time and amount of damage, 

 and what measures for their destruction can be taken. Arsenical sprays and washes are rec- 

 ommended, and their use explained and defended. 



Charles V. Riley. Address at the semi-annual State Convention of Fruit-Growers 

 of California. 



Pacific Rural Press, April 23, 1887, pp. 361-364. 



Remarks principally on Icerya purchasi Mask., giving a review of the nomenclature, the 

 geographical distribution and probable origin of the species, a list of the food-plants, possi- 

 bility and mode of spreading, characteristics of the insect, natural enemies, and a very ex- 

 haustive review of the measures for the prevention of the spread of the pest and means of 

 applying them, and the results of some experiments made by him or under his direction ; also 

 refers to parasites, and suggests the visit of an experienced observer to Australia to study the 

 species in its native home, and artificially introduce any parasite there found preying on it ; 

 urges appointment of State entomologists, and makes suggestions as to best law ; importance 

 of prevention ; prosperity vs. insect injury, etc. 



