12 INDEX TO MISSOURI ENTOMOLOGICAL REPORTS. 



Page- 

 Insects infesting the Potato Continued. 



THE THREE-LINED LEAF-BEETLE 99 



Merdigerons habit of the larva, 99 It ha two annual broods, 100 

 Other notes on the habits of the insect, 100. 



THE CUCUMBER FLEA-BEETLE 101 



THE COLORADO POTATO-BEETLE 101 



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

 gradual spread eastward, 102 Its confusion with the Bogus Colorado 

 Potato-beetle, 103 How the two species differ in habits, 104 ; in their 

 larval states, 104; in the egg-state, 105 Description of the larva of 

 Dorypliora jnncta, 106 Differences in the images of the two species, 106 

 Habits of the Colorado Potato-beetle, 107 When it appears and dis- 

 appears, 107 Number of eggs laid by each female, 107 Food-plants, 

 107 Singular fact that D. jnncta has not acquired the habit of attack- 

 ing the Potato, 108 Natural remedies, 109 Complicated economy of 

 nature, 109 Decrease in the number of Potato-beetles on account of 

 increase in the number of parasites, 109 The Colorado Potato-beetle 

 parasite, 111 Its general character and habits, 111 Description of 

 Lydella doryphora*, 111 Ladybirds and their larva*, 112 The Spined 

 Soldier-bug, 113 The Common Squash-bug erroneously considered an 

 enemy of the Potato-beetle, 113 The Bordered Soldier-bug, 114 The 

 Many Banded Robber, 114 The Rapacious Soldier-bug, 114 The 

 Virginia Tiger-beetle, 115 The Fiery Ground -beetle, 115 Blister- 

 beetles, 115 The larva? 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 specimens of 

 the beetle, 117. 

 The Apple-root Plant-louse .* 118 



Three distinct kinds of rots affecting the roots of Apple-trees, lid The 

 Root-louse the cause of oue of these rots, 118 The cause of the other 

 rots still hidden, 119 The Root-louse especially injurious in southerly 

 latitudes, 119 It occurs also on other parts of the tree besides the root, 

 120 Description of the winged louse, 120 Fitch's description of the 

 winged form refers to another species, 120 The Root-louse belongs 

 to the genus Enosoma, 121 Natural enemies, 121; Chalcis-fly, 121; 

 The Root-louse Syphus-fly, 121; Scymnus cervicalis, 122 Artificial 

 remedies, 123. 

 The Wooly Elm-tree Louse 123 



Its general appearance and habits, 123 Description of the winged form, 

 124, 



Insects Injurious to the Grape-vine 124 



THE NEW GRAPE-ROOT BORER 124 



Reports on the damage caused by it, 124 Description of the larva, 126 

 It belongs probably to the Cylindrical Orthosorna, 126 Former ac- 

 counts of the natural history of this beetle, 127 Its injury known for 

 several years, 127 Remedies, 128. 

 THE GRAPE CURCULIO 128 



Nature of the damage done by it, 128 Its larva, 128 The perfect beetle, 



129 No injury done by it in 1868, 129. 

 THE GRAPE-SEED CURCULIO 129 



General appearance of the maggot, 129 Mr. Sauuder 3' account of the 

 damage done by it, 130. 



