134 BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 



1127. BILEY, C. V. Continued. 



THE CANKER-WORM. Paleacrita vernata; Anisopteryx pometaria 94 



The eggs, 94 The larva and larval changes, 95 Importance for 

 the orchardists to recognize the true canker-worm, 95 The im- 

 ported elm leaf-beetle mistaken for it, 95 Description of the 

 larva, 96 Its food-plants, 96 The chrysalis, 96 Only one an- 

 nual brood in the latitude of St. Louis, 97 The moth and its 

 varieties, 97 It is less injurious in Missouri than in the Eastern 

 States, 97 Remedies, 98 Classification of remedies proposed, 

 98 The trough aud bandage systems, 99 Muriate of lime as 

 remedy, 100 Jarring the tree, 101 Late fall plowing, 101 

 Summer plowing, 102 Efficiency of hogs, 102 Enemies, 102; 

 birds, mites, and parasites, 102; ground-beetles, 103 ; the fraternal 

 potter-wasp, 103. 



CABBAGE- WORMS - 104 



The Southern cabbage butterfly, Pieris protodlce 104 



Its geographical range, 104 Injury caused by it in Missouri, 104 

 Description of the larva, 105 The chrysalis and imago, 105 

 Habits and other food-plants, 105. 



The potherb butterfly, Pieris olearacea, 105 It is a Northern spe- 

 cies, 105 It will very likely never occur in Missouri, 106 Geo- 

 graphical range of insects principally influenced by temperature, 

 106 Isentomic lines, 106 Southern insects found near S"t. Louis, 

 106. 



The imported cabbage butterfly, Pieris rapw, 106 Amount of dam- 

 age caused by it in Canada, 107 Its spread westward, 107 It 

 will undoubtedly spread to St. Louis, 107 The insect in Eu- ' 

 rope, 107 History of its introduction, 107 The insect in its dif- 

 ferent stages, 108 Its food, 108 Remedies, 109 Parasites, 109. 

 The cabbage Plusia, Plusia braasicce 110 



Characteristics and habits of the larva, 110 Its transformations, 

 111 Remedies, 111 Description of larva, chrysalis, and imago, 

 111 A similar worm occurring on thistles, 112. 

 The zebra caterpillar, Mamestra picta 112 



Habits and characteristics of the larva, 112 The chrysalis and 



the moth, 113 Two annual broods, 113 Food-plants, 113. 

 THE TARNISHED PLANT-BUG, Lygus pratemis .-. 113 



Injury caused by it to various trees and plants, 114 It is a very 

 variable species, 114 Its development, 114 No effective remedy 

 known, 115 Preventive measures, 115. 

 THE PHILENOU SWALLOW-TAIL, PaplUo plMenor 116 



Its food-plant, 116 Damage done by it, 116 Characteristics and 

 development of the larva, 116 Description of the larva, 117 

 The pupa, 117 The imago, 117 Prevention, 118. 

 THE COTTONWOOD DAGGER, Acronycta lepusculina. 119 



General appearance of the larva, 119 Two annual broods, 119 

 Chrysalis and moth, 119 Larvfe of other species belonging to 

 the genus Acronycta, 119 Parasites, 120 Description of larva 

 and imago, 120 Characters and habits of other species of the 

 same gemis, 121. 

 THE MISSOURI BEE-KILLER, Proctacanthua miller Hi 121 



The true scientific name of the Nebraska bee-killer, 121 Wing-veins 

 of the genera Asilus, Promachus, and Erax, 122 Description of 

 the Missouri bee-killer, 122 How to destroy theflies,123 Habits 

 and life-history of Asilus-flies, 123 Description of larva and pupa 

 of Erax bastardi (?), 124 Synonymical notes on the imago, 124. 



