186 
BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
1423. Riley, C. V.—Continued. 
The Grape Phylloxera—C ontinued. 
era, 91—Different forms presented by the species, 93—Its power 
to change its habit, 93—Specific identity of the gall- and root- 
louse, 94—Untrustworthy experiments made by the Department 
of. Agriculture, 95—Proof of the identity of the two forms, 95— 
The gall-louse is hut a transient form, 96—Where do the winged 
females lay their eggs ? 96—The winged female lays the egg 
wherever she is carried by the wind, 97—Particular part of the 
vine chosen by the winged female for laying her eggs, 98—The 
true sexual individuals, 98—Injury done by Phylloxera in America 
during the year 1874, 99—Range of the insect in America, 101— 
Does it occur in South Carolina and Georgia? 102—The Phyllox¬ 
era in California, 103—Injury done during the year 1874 in France, 
103—Its spread in Europe, 104—Direct remedies, 105—Natural 
enemies, 106—Susceptibility of different varieties of grape-vine, 
106—Grafting as a means of counteracting the work of Phyllox¬ 
era, 108—Underground grafting, 109—Methods of grafting above 
ground, 112—Roots to use as stock, 115—Varieties to graft, 116— 
American grape-vines abroad, 116. 
Appendix to the article on grape Phylloxera. 117 
Synopsis of the American species of the genus Phylloxera, 117— 
The American oak Phylloxera, 118—Its natural history, 119—De¬ 
scription of Phylloxera rileyi and the different forms presented 
by it, 119—Further points in its life history, 120. 
The Rocky Mountain locust, Caloptenus spretus . 121 
Its natural history, 121—Method of egg-laying, 121—The egg, 122— 
The newly-hatched locust and its development, 122—Where the 
eggs are laid by preference, 123—The invading swarms are formed 
• by a single species, 124—Difference between the Rocky Mountain 
and the red-legged locusts, 125—Mr. Thomas’s description of the 
red-legged locust, 126—Variations, 126—Measurements of Calopte- 
nus femur-rubrum, 127—Description of Caloptenus spretus and of its 
larva and pupa, 129—Measurements of Caloptenus spretus, 130— 
Summing up the difference between the two species, 132—Chrono¬ 
logical history, 132—Locust invasions in the Old World, 132—Ac¬ 
counts of earlier locnst invasions in America, 133—Chronological 
history of the Rocky Mountain locust, 134—Earlier invasions, u 
135—Data regarding the invasion of 1867, 137—The invasion of 
1873, 141—The invasion of 1874, 143—-The invasion of 1874 in 
Missouri, 144—Questions addressed to correspondents in each 
county in Missouri regardiug the locust, 144—Summary of the 
answers given by correspondents, 145—The invasion of 1874 in 
Kansas, 148—In Nebraska, 151—In Iowa aud Minnesota, 153— 
In Colorado, 154 — In Dakota and Manitoba, 155—Flight and 
ravages of a locust swarm, 156—Food-plants, 158—Time of ap¬ 
pearance of invading swarms, 160—Eastei'n limits of locust invas¬ 
ions, 161—Native home of the species, 162—Explanation of the 
migratory instinct, 164—This locust can not thrive in the Missis¬ 
sippi Valley, 164—It. is an subalpine insect, 165—What injury may 
be expected in Missouri in 1875,166—Ravages of migratory locusts 
in the Atlantic States, 167—Description of the Atlantic migra¬ 
tory locust, 169—Differences between Caloptenus spretus, differen- 
tialis, and atlanis, 170—Injury from other, non-migratory, locusts, 
171—The differential and two-striped locusts, 173—Enemies and 
parasites, 174—Birds destroying locusts or their eggs, 174—The 
