BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 295 



2119. EILEY. C. V. Continued. 



INSECTS AFFECTING CORN OR MAIZE Continued. 



Rhodoboenua 13-punctatus and Ehynchophorus zimmermanni, 82 

 Description of the pupa, 82. 

 The smaller corn-stalk borer, Pempelia lignosella 82 



First appearance of the pest, 82 Geographical distribution in the 

 United States, 83 Habits and natural history, 83 Work of the 

 larva, 83 Transformation, 83 Habits of the moth, 83 Prevent 

 ive measures, 84 Color variations of the moth, 84 Mouth parts 

 of the moth, 84 Description of the larva, 84 Description of the 

 pupa, 85. 

 The boll- worm, alias corn-worm, Heliothis armigera 85 



Injury to corn in 1881, 85 Food-plants, 85 Identity of the corn- 

 worm and boll-worm, 85 Number of broods in the northern 

 States, 86 Nature of damage done to corn, 86 The worm also 

 feeding on hard corn, 87 Corn-feeding broods in the southern 

 States, 87 Damage done to tomatoes, 88 Food-plants of the 

 families Solanacere and Leguminosse, 88 Cucurbitaceous and 

 malvaceous food-plants, 89 Various other food-plants, 89 List 

 of food-plants probably still incomplete, 89 Carnivorous habit 

 of the worm, 89 Report upon Heliothis armigera, by Judge Law- 

 rence Johnson, 90. 

 THE COTTON-WORM, Aletia xylina 92 



Address by C. V. Riley before the Atlanta cotton convention, 93 

 Past work on the practical side of the cotton-worm question, 93 

 Obstacles and difficulties of the investigation, 93 Natural his- 

 tory, 94 The insect in its different stages, 94 Time of develop- 

 ment and first appearance of the worms, 94 Poisons best applied 

 from beneath, 95 Improvements in machinery for applying poi- 

 sons, 95 Nozzles of various forms, 96 Machinery for poisoning 

 from below, 96. 

 Protection from injury in regions overflowed by the Mississippi 97 



Poisons should be applied to the under surface of the leaves, 98 

 Paris green and London purple, 98 Sprinkling and sifting, 98- 

 Device for mixing poisons and diluents, 98 Arsenic andarseniate 

 of soda, 98 Early poisoning, 99. 

 Poisoning devices machine for spraying from below 99 



The skid, 99 Device for thorough mixing and filling the barrel, 

 100 Details of barrel, pump, and stirrer, 100 Inserting and ex- 

 tricating the stirrer-bar, 100 Fork of the descending pipe, 100 

 The nozzles, 102. 

 Damage in 1881 102 



Loss of cotton by worms by States and counties, 102 Loss of 



cotton by worms in 1881, tabulated, 104. 

 Possible food -plants of the cotton-worm 105 



No other food-plant than cotton yet found, 104 Eggs of Anomis 

 erosa found on Urena lobata, 104 Eggs and young larvae of Anomis 

 erosa distinguished from those of Aletia xylina, 105 Plants upon 

 which eggs related to Aletia were found in the Department her- 

 barium. 105 Localities for malvaceous plants, with possible 

 food-plants of Aletia indicated, 105. 

 The question of hibernation settled 106 



Theories of hibernation, 106 Eggs deposited early in March, 106 

 The early brood of worms, 106 Where the moth hibernates, 

 106 Value of fall and winter preventive work, 106. 



