BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
161 
1311. Riley, C. Y.—Continued. 
Insects injurious to the grape-vine . 53 
The red-shouldered Sinoxylon, Sinoxylon basilare . 53 
Characteristics of the insect as imago, larva, and pupa, 54—Dam¬ 
age done by it to grape-vines, fruit trees, and hickory, 54—De¬ 
scription of the larva and pupa, 54. 
Grape disease . 55 
The grape-leaf gall-louse, Phylloxera vastatrix . 55 
Its scientific name, 55—The law of priority, 55—European grape¬ 
vines valueless in the eastern United States, 55—Deterioration 
of some of our native vines, 56—Climatic reasons for the failure 
of European vines, 56—The principal cause of this failure is the 
Phylloxera, 56—Further proof of the identity of the American 
with the European insect, 57 —Reasons for the identity of the 
gall-louse with the root-louse, 57 — Further facts respecting 
the habits of the root-louse, 58—Underground forms, 58—The 
young lice and their habits, 59—Hibernation, 59—The pupa, 59— 
The winged female, 59—Susceptibility of different vines to the 
attacks of the louse, 60—Classification of the North American 
grape-vines according to their practical importance, 60—Synopsis 
of the true grape-vines of the United States, by Dr. George En- 
gelmann, 60—Difficulty of separating the cultivated varieties of 
grape-vine, 61—Importance of a proper classification of culti¬ 
vated grape-vines, 62 — Importation into Europe of resisting 
American vines, 62—Enumeration of the cultivated varieties and 
their susceptibility to the disease, 63—No variety is entirely ex¬ 
empt from the attacks of the root-louse, 64—American vines 
which resisted the root-louse in Europe, 64—Means of contagion 
from one vine to another, 64—The spread of the root-lice from 
one vine to auother, 64—Transportation of the louse upon the 
roots of seedlings and cuttings, 64—Spread of the disease in 
France, 64—The winged female of the root-louse and her func¬ 
tion, 65—The vernal leaf-gall, 65—Preference of the winged 
Phylloxera for the Clinton grape and its allies, 65—Power of 
flight of Phylloxera carycefolice, 66—Deposition of the eggs upon 
the leaf, 66—Probable reasons why the injuries of the Phylloxera 
are greater in Europe than in America, 66—Outward and more 
visible effects of the root-disease, 67—Practical suggestions, 67— 
No need to destroy the Clinton vines, 67—Influence of soil on 
the intensity of the disease, 67—Remedies, 68—Destruction of 
the gall-lice, 68—Destruction of the root-lice, 68—Results of ex¬ 
periments in France with various substances, 68—Irrigation and 
submersion, 69—Rdsumd of the insect’s history, 69—No need of 
unnecessary alarm, 70. 
BENEFICIAL INSECTS. 
Silkworms. 72 
Introductory. 72 
The Morns multicaulis fever and its reaction, 72—Increasing atten¬ 
tion lately given to silk-culture in America, 72—North America 
well adapted to the raising of silk, 73—General outlines of the 
natural history of the eight species of silkworms treated of in 
this report, 74. 
11 ENT 
