40 INDEX TO MISSOURI ENTOMOLOGICAL REPORTS. 



Page. 

 The Rocky Mountain Locust Continued. 



swarms, 160 Eastern limits of locust invasions, 161 Native home 

 of the species, 162 Explanation of the migratory instinct, 164 This 

 locust cannot thrive in the Mississippi Valley, 164 It is a 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 Migratory Locust, 169 Differences between Caloptenus 

 sprctits, differentialis 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 

 Silky Mite, 175 The Locust Mite and Dr. LeBarou's description 

 thereof, 176 The Anonymous Tachina-fly, 178 The Common Flesh- 

 fly, 180 Remedies, 181 Classification of protective measures, 181 

 Natural agencies, 181 Destruction of the eggs, 181 Destruction of 

 the young wingless locusts, 182 Driving off the winged locusts, 184 

 Further suggestions, 185 Locusts as food for man, 186 The popular 

 and scientific names of the insect, 187 Prairie fires vs. the Rocky 

 Moimtain Locust, 189. 



APPENDIX TO THE ARTICLE ox THE ROCKY MOUNTAIN LOCUST 191 



Letters of three correspondents from Texas and Kansas regarding Locust 

 invasions, 191. 



REPORT VIII. 



[Published May, 1876.] 



Preface Ill 



Table of Contents V 



NOXIOUS INSECTS. 

 The Colorado Potato-beetle 1 



Damage during the year, 1 Abundant in Atlantic States, 1 Swarming 

 on Coney Island, 2 Injuring Egg-plant, 2 Its scientific name, 2 

 Additional enemies, 3 Eaten by the Crow, 3 Remedies, 3 Cost of 

 applying Paris green, 3 Preparing the poison, 3 Use of straw as a 

 protection, 4 Machine for sprinkling, 4 Machine for brushing off the 

 insects, 4 Experience with Paris green, 5 Experiments of Profs. R. 

 C. Kedzie and Win. McMurtrie show that it may be used with safety, 6 

 Trial of other remedies, 6 The insect's native home, 8 The theory 

 that it came from the Rocky Mountain Region essentially correct, 10 

 Poisonous qualities of the insect discussed, 10. 

 Canker Worms 12 



Two species long confounded, 12 They differ generically ; new genus 

 (Paleacrita) proposed for one, 13 The two compared in all stages, 13, 

 14 Characters of the genus Paleacrita, 17 Distinguished as Spring 

 and Fall Canker-worms, 17 Practical considerations from their differ- 

 ences of habit, 18 Stunting the larvas does not produce male niotbs, 

 19 Traps recommended, 20, 21. 

 The Army Worm , 22 



Its generic name. 22 The term ' 'Army-Worm " applied to various insects, 

 23 Past history of the Army Worm, 24 Known since 1854 in Mis- 9 

 souri, 27 It followed the 1871 conflagration around Peshtigo, Wis., 

 28 Its history in 1875 ; very general all over the country, 28, 29 Its 

 history in Missouri in 1875, 30 Sexual differences, 30 Sexual organs 

 illustrated, 30, 32 Natural history of the species, 32 Illustrated in 

 all states, 32, 33 It occurs in Europe, Asia, New Zealand, and Austra- 



