362 
BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
2389. Riley, C. Y.—Continued. 
S.-b. Bo. 61, pp. 97-104. <Los Angeles Tribune, 14 April, 
1887. S.-b. Bo. 61, pp. 104-111. See: <Pacific Rural Press, 
23 April, 1887, v. 33, pp. 361-362; 364. S.-b. Bo. 61, p. 48; Bo. 
63, p. 76. <Riverside Daily Press, 12, 13 April, 1887. S.-b. 
Bo. 61, pp. 65-68; Bo. 63, pp. 98-105. <Press and Horticult¬ 
urist, 16 April, 1887. S.-b. Bo. 61, pp. 74-82. <Florida Dis¬ 
patch, 2 May, 1887, v. 7, pp. 385-388. S.-b. Bo. 63, pp. 75; 77. 
<Pacific Rural Press, 2 July, 1887, v. 34, p. 9. 
CONTENTS. 
Letter of submittal. 5 
Introduction.. 7 
The scale-insects of the orange in California, and particularly the 
Icerya or fluted scale, etc. 9 
Notes on Icerya—Its probable origin the Islands of Bourbon and 
Mauritius. 27 
The use of gases against scale-insects. 35 
2390. [Riley, C.Y.] [Classification of insects.] <Entom. Amer., Sep¬ 
tember 1887, v. 3, p. 102. 
Comments on the address of J. H. Comstock before the A. A. A. S. 
2391. [Riley, C. V.] [Pronuba and its connection with the pollination 
of Yucca.] <Entom. Amer., September, 1887, y. 3, pp. 107-108. 
Record of the results of recent experiments on the pollination of Yucca and 
the agency of T*ron\iba in this work. 
2392. Riley, C. V. Besclireibung einer den Birnen schadlichen Gall- 
miicke (? Diplosis nigra Meig.). <Wiener Entomol. Zeit., Sep¬ 
tember, 1887, y. 6, pp. 201-206, 3 figs. 
Discovery of the species in America ; its habits and life-history ; detailed de¬ 
scription of all stages; possible difference between European and American 
specimens; suggests D. pyrivora for the latter, if distinct. 
2393. Riley, C. V. Some important discoveries in the life-history of 
the hop-plant louse (Phorodon Jiumuli Scfirank). <Soc. for 
• Prom. Agric. Sci., September, 1887,1, Bo. 9, p. 205. Reprint: 
<Sci. Amer. Suppl., 24 September, 1887, v. 21, p. 9781. S.-b. 
Bo. 61, pp. 117-119. <Gardener’s Mo. and Hortic., October, 
1887, v. pp. 309-311. S.-b. Bo. 61, p. 124. 
Rdsum6 of recent discoveries in the life-history of Phorodon humuli; proof of 
its migration from plum to hop ; life of the egg on plum in winter ;• spring 
migration to hop ; number of broods thus far observed ; probable course of 
later broods. 
2394. Riley, C. V. Report of the entomologist. <Ann. Rept. [TJ. S.] 
Commissioner Agric. for 1886,1887, pp. 459-592^ 11 pi. Sep¬ 
arate : <Washington, September, 1887, pp. 459-592 + 6+9,11 pi. 
TABLE OF CONTENTS. 
Introduction.. 459 
Fruit interests of the Pacific coast, 459—Cottony cushion-scale 
(Icerya purchasi), 459—Kerosene emulsions, 459—Caustic soda 
