BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
137 
1241. Hubbard, H. G. Scale insects of the orange. <Ann. Kept. [U. 
S.J Comm. Agric. for 1881 and 18S2, 1882 [January, 1883], pp. 
46-67. 
See Part 3, No. 2119, pp. 293-294. 
1242. Hubbard, H. G. Miscellaneous notes on orange insects. <Bull. 
Ko. 1,1)iv. Ent., U. S. Dept. Agric. [17 April], 1883, pp. 9-13. 
See Part 3, No. 2164, p. 302. 
1243. Hubbard, H. G. Experiments on scale insects, with practical 
suggestions. <Ann. Eept. [U. S.] Comm. Agric. for 1883, pp. 
152-159. 
See Part 3, No. 2232, p. 311. 
1244. Hubbard, H. G. Kerosene emulsion. <Gardeners’ Chronicle, 
20 June, 1885, v. 23, p. 790. 
Formula for kerosene emulsion. 
1245. Hubbard, H. G. Eust of the orange. <;Ann. Eept. [U. S.] 
Comm. Agric. for 1884, 1885, pp. 361-373. 
See part 3, No. 2291, p. 329. 
1246. Hubbard, H. G. Insects affecting the orange. Eeport on the 
insects affecting the culture of the orange and other plants of 
the Citrus family, with practical suggestions for their control 
or extermination made under direction-of the entomologist. 
<Washington, 1885, pp. 10+227,14 plates, 95 figures. 
CONTENTS. 
Page. 
Injuries by insects distinguished from organic disease. 1 
Diseases affecting the condition of the plant; die-back, 1—bark- 
fungus, 2—foot-rot;—smut, 3—splitting of fruit, 4—dropping of 
fruit, 5. 
The insect fauna of the orange. 5 
Attraction which the orange tree has for insects, 5 —injurious 
insects;—beneficial insects, 6—innocuous insects;—importance 
of distinguishing friends from foes, 7—presence of certain injuri¬ 
ous insects indicated by ants, 8. 
Systems of cultivation. 8 
Influence of shade upon the increase of iusect pests, 8—clean culture 
or mulching preferable to cropping young groves; seasons of 
greatest insect activity, 9 —the proper months for applying 
remedies, 10. 
Part I. Coccidae. Scale insects, or baric lice. 
CHAPTER I. 
Characters of the Coccidae and commencement of the consideration of 
the subfamily Diaspinse. 13 
General characters of bark-lice and their relations to other insects;— 
products of bark-lice, 13—division into subfamilies, 14—life- 
history of the Diaspince ;—the larva, 15—growth of the scale, 
16—the females;—the males, 17—periods of development; nature 
of the scale-covering, 18—Long scale, 19—life-history, 21—broods, 
22—parasites, 23—origin and spread, 24. 
