BIBLIOGRAPHY OF THE U. S. NATIONAL MUSEUM. 721 



Robert Ridgwat. (Letter addressed to the Editors of " The Ibis " iu regard to the 

 Breediug Plumage of Cohjmbus occidentalis.) 

 Ibis, 5tli ser., v, 1887, pp. 361-362. 



Shows that the summer plumage of Colyrnbus occidentalis was kuowu to and correctly de- 

 scribed by North Amerioaa ornithologists, and suggests that the bird described in a previous 

 number by Canon Tristram as such may be a Colyrnbus holboellii with the throat unusually 

 liglit-colored. 

 Robp:kt Ridgwav. Grouse and Mallard Pliunage. 



Forest and Stream, xxix, No. 24, Jimuary 25, 1888, p. 463. 

 C. V. RiLKY. Report on the Department of Insects in the U. S. National Museum, 

 18d5. 



Repo7-t of the Smithsonia^i Institution for 1SS5. (1886), Part ii, pp. 113-116. 

 Charles V. Riley. The Life History of the Icerya. Eormsof the Cottony Cushion 

 Scale. 



Pacific Rural Press, xxxiv, July 2, 1887, p. 9. 



Editorial quotations from the reports of the author for 1886, and gives copy of plates with 

 figures of the d insect. Description of life history of the male. 

 Charles V. Riley. The Hop Plant-Louse. 

 Country Gentleman, lii, July 7, 1887, p. 529. 



Kesume of the recent discoveries in the life history of the species, setting forth the proof of 

 migration from plum to hop, the number of broods thus far observed, and the probable 

 course of the later broods. 

 Charles V. Riley. A New Apple Pest. The Apple Leaf Flea-Beetle (Haltica 

 pun clip ennis Le Conte). 



Gardener's Monthly, xxix, July, 1887, p. 216. 



A brief history of the species as a new injurious insect, giving habits and remedies. 

 Charles V. Riley. Whitewashing Trees. 



City and Country (Columbus, Ohio), VI, August, 1887, p. 217. 



Quotes the author's views discountenancing the practice as valueless against certain troo 

 defoliators. 

 Charles V. Riley. Report of Observations and Experiments in the Practical Woi !v 

 of the Division, made under the Direction of the Entomologist. 



77. S. Department of Agriculture, Division of Entomology, Bulletin, No. 14, August 3, 1 887, 

 pp. 1-62. One plate ; two figures. 



Contains the following papers : Introduction, by C. V. Riley, pp. 7, 8 : a general commentary 

 on the other contents of the bulletin, especially disclaiming concurrence in the conchisions of 

 D. B. Wier. Keport on Insects Injurious to Garden Crops in Florida, by Wm. H. Ashmead, 

 special agent, pp. 9-29. Report on Butfalo Gnats, by F. M. Webster, special agent, pp. 

 29-39. The Native Plums — How to Fruit them — They are Practically Curculio-Proof, by D. 

 B. Wier, pp. 39-52. The Serrell Automatic Silk Reel, by Philip Walker, pp. 52-59, with 

 plate and two figures. 

 Charles V. Riley. The Icerya or Fluted Scale, otherwise known as the Cottony 

 Cushion-Scale. 



U. S. Department of Agriculture, Division of Entomology, Bulletin No. 15, August, 1887, pp. 

 1-40. 



[Reprint of some recent articles by the Entomologist and of a report from the Agricultu- 

 ral Experiment Station, University of California.] 



Contains the following: The Scale Insects of the Orange in California, and particularly 

 the Icerya or Fluted Scale, alias White Scale, alias Cottony Cushion-scale, etc. [Address by 

 Prof. C. V. Riley before the California State Board of Horticulture, at its serai-annual session 

 at Riverside, California, April 12, 1887, as reported in the Pacific Rural Prens, June 11, 1887, 

 pp. 27-33.] The use of gases against Scale Insects. Report from Bulletin No. 71, Agricultu- 

 ral Experiment Station, University of California, pp. 35-40. 

 Charles V. Riley. Discovery of the female of Phengodes. 

 Entomologica Americana, in, September, 1887. p. 107. 



Brief statement of the characters of the ? Phengodes, before the Ent. Club A. A. A. S., 

 forming part of the published minutes. 

 Charles V. Riley. Pronuba and the Pollination of Yucca. 

 Entomologica Americana, ni, September, 3887, pp. 107, lOS. 



Gives a record of the results of recent experiments on the pollination of Yucca and the 

 agency of Pronuba in this work. Reiterates his previously expressed views on this subject. 

 (In Proc. Ent. Club A. A. A. S.) 



H, Mis. 142, pt. 2— — 4G 



