186 BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 



1423. RLLEY, C. V. Continued. 



THE GRAPE PHYLLOXERA Continued. 



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 but 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 sexualindividuals, 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 abjoad, 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 CaloptenusspretussmAof 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 locust invasions in America, 133 Chronological 

 history of the Rocky Mountain locust, 134 Earlier invasions, 

 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 regarding the locust, 144 Summary of the 

 answers given by correspondents, 145 The invasion of 1874 in 

 Kansas, 148 In Nebraska, 151 In Iowa and 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 Eastern 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 



