38 INDEX TO MISSOURI ENTOMOLOGICAL REPORTS. 



REPORT VII. 



Page. 

 [Submitted at time of publication, April, 1875.1 



Preface -. 



Table of Contents --- VII 



NOXIOUS INSECTS. 

 The Colorado Potato-beetle 



Its gradual spread eastward, 1 It reached the Atlantic during the year 

 1874, 1 Injuries done during the year 1874,2 Alarm about it in 

 Europe, 3 Prohibiting the importation of American potatoes by Euro- 

 pean governments, 3 The insect probably introduced into Europe 

 in the perfect form, 3 It would doubtless thrive in Europe if im- 

 ported, 4 Its ravages exaggerated and underrated, 5 On the safety 

 and advisability of the use of Paris green, 8 Past experience with 

 the poison, 10 Influence of Paris green on the plant and on the soil, 

 11 Influence of the green on man indirectly through the soil or 

 through the plant, 13 The beetle eats as well as the larva, 14 It 

 passes the winter as imago, 14 New food-plants, 14 New means of 

 destruction, 15 The Gray Sprinkler, 15 The proper scientific name 

 of the beetle, 16 Mr. Carriere's ridiculous statements, 17. 



The Chinch Bug 19 



Its disastrous work in 1874, 19 Circular distributed among farmers, 19 - 

 Appearance and transformations of the Chinch Bug, 20 The short- 

 winged form, 20 Description of the Chinch Bug and its earlier states, 

 21 Its past history in America, 2'2 Its past history in Missouri, 22 

 Destructive powers of the Chinch Bug, 24 Its injuries in 1874, 24 

 Its injuries in Missouri in 1874, 25 Food-plants, 26 Time required 

 for the complete development of various insects. 27 Number of an- 

 nual broods, 27 Its rapid increase, 23 Where the eggs are laid, 23 

 Flight of the Chinch Bug, 29 Its migrations on foot, 30 Heavy 

 rains destructive to it, 30 Direct remedies, 31 Irrigation, 31 Pre- 

 ventive measures, 32 Burning, 32 Rolling, 33 Manuring and early 

 sowing, 34 Mixing seed, 34 Preventing the migration of the bugs 

 from one field to another, 35 Importance of winter work and com- 

 bined action, 36 Other possible remedies, 37 Abstaining from the 

 cultivation of grains, 38 Natural enemies, 38; Ladybirds, 39; Lace- 

 wing fly and habits of its larva, 40 ; The Insidious Flower-bug and 

 the Many-banded Robber, 41 Birds destructive to the Chinch Bug, 41 - 

 Discussion of other proposed remedies and preventive measures, 41- 

 The Chinch Bug injurious to stock, 43 Prognosticating. 44 Unneces- 

 sary fears, 44 Bogus Chinch Bugs, 45 The False Chinch Bug, 46 

 The Insidious Flower-bug and the Ash-gray Leaf-bug, 47 The Flea- 

 like Negro-bug, 48 Recapitulation, 49. 



APPENDIX TO THE ARTICLE ox THK CHINCH BUG 51 



List of correspondents who replied to the circular, 51 Questions an- 

 swered by correspondents, 52 Answers given by correspondents, 53. 



The Flat-headed Apple-tree Borer 71 



Extent of its ravages in fruit and shade trees, 71 Its natural history, 

 72 Natural enemies, 73 Chalcid larva, 74 The Cherished Bracou, 

 75 The Useful Labeua, 75 Ants, 76 Remed ies, 76 Keeping young 

 trees vigorous and healthy, 77 Coating the trunks and larger branches 

 with soap and other greasy substances, 77 Scraping, 78 Wrapping 

 wire gauze around the trunk, 79 Cutting out the newly-hatched larva, 

 79. 



