120 BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 



1059. RILEY, C. V. Continued. 

 CUT- WORMS Continued. 

 Remedies against cut- worms 89 



Natural enemies, 89 ; Microgaster militaris, 89 ; Paniscus geminatua, 

 89; The spined soldier-bug, 89; The cut-worm lion, 89 Other 

 enemies, 90 Artificial remedies for climbing cut-worms, 90; for 

 common field cut- worms, 91. 



INSECTS INFESTING THE POTATO 91 



General remarks, 91 Number of species affecting the potato, 92. 



The stalk-borer, Gortyna nitela 92 



Habits of the larva and imago, 92 Remedy, 93. 



The potato stalk- weevil, Trichobaris trinotata 93 



Its geographical distribution, 93 Its habits, 93 Remedy, 95. 



The potato- or tomato- worm, Protoparce celeus. . 95 



It can not sting with its horn, 95 Its chrysalis, 95 How the 

 imago differs from the tobacco-worm moth, 95 Remedies and 

 parasites, 96. 



Blister-beetles, Meloidas 97 



The striped blister-beetle, 96 The ash-gray blister-beetle, 97 

 The black-rat blister-beetle, 98 The black blister-beetle, 98 

 The margined blister-beetle, 98 Synonymical remarks, 98 

 Remedies for blister-beetles, 99. 



The three-lined leaf-beetle, Lema trilineata 99 



Merdigerous habit of the larva, 99 It has two annual broods, 

 100 Other notes on the habits of the insect, 100. 



The cucumber flea-beetle, Crepidodera cuoumeris 101 



The Colorado potato-beetle, Doryphora W-lineata 101 



Its past history and future progress, 101 Its native home, 101 Its 

 gradual spread eastward, 102 Its confusion with the bogus Colo- 

 rado potato-beetle, 103 How the two species differ in habits, 

 104 ; in their larval states, 104 ; in the egg state, 105 Descrip- 

 tion of the larva of Doryphora juncta, 106 Differences in the 

 imagos of the two species, 106 Habits of the Colorado potato- 

 beetle, 107 When it appears and disappears, 107 Number of 

 eggs laid by each female, 107 Food-plants, 107 Singular fact 

 that D. juncta has not acquired the habit of attacking the potato, 

 108 Natural remedies, 109 Complicated economy of nature, 

 109 Decrease in the number of potato-beetles on account of in- 

 crease in the number of parasites, 109 The Colorado potato-bee- 

 tle parasite, 111 Its general character and habits, 111 Descrip- 

 tion of Lydella doryphorcs, 111 Lady-birds and their larvse, 

 112 The spined soldier-bug, 113 The common squash-bug, erro- 

 neously considered an enemy of the potato-beetle, 113 The bor- 

 dered soldier-bug, 114 The many banded robber, 114 The ra- 

 pacious soldier-bug, 114 The Virginia tiger-beetle, 115 The 

 fiery ground-beetle, 115 Blister-beetles, 115 The larvse not 

 touched by fowl, 115 Artificial remedies, 116 Ineffectiveness 

 of mixtures tried, 116 Killing the beetle early in spring, 116 

 Pincers for crushing the insect, 116 Benson's machine, 116 

 Proper choice of varieties of potatoes, 117 The pest will over- 

 run the Eastern States, 117 Carelessness in transmitting speci- 

 mens of the beetle, 117. 



