134 BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 
1127. Riley, C. Y.^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 protodice . 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 St. Louis, 
106. 
The imported cabbage butterfly, Pieris rapce, 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 brassicce . 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 pratensis . 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 philenor swallow-tail, Papilio philenor . 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—Larvae 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 genus, 121. 
The Missouri bee-killer, Proctacanthus milbertii . 121 
The true scienti tic name of the Nebraska bee- killer, 121—Wing-veins 
of the genera Asilus, Promachus, aud Erax, 122—Description of 
the Missouri bee-killer, 122—How to destroy the flies, 123—Habits 
and life-history of Asilus-flies, 123—Description of larva and pupa 
of Erax bastardi (?), 124—Syuonymical notes on the imago, 124. 
