BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 185 



1423. KLLEY, C. V. Continued. 



THE COLORADO POTATO-BEETLE Continued. 



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, lo The proper scientific name of the beetle, 16 

 Mr. Carriere'-; ridiculous statements, 17. 



THE CHINCH-BUG, Blissus leucopterus 19 



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

 ers, 19 A >pearance 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 22 Its past 

 history in Misso iri, 22 D -^tractive powers of ihe chinch-bug, 

 24 Its injuries in 1874, 24 Its injuries in Missouri in 1874, 25 

 Food-plants, 26-^Time required f r the com ete development of 

 various insect-*, 27 Number of annual broods, 27 Its rapid in- 

 crease, 28 Where the eggs are laid, 28 Flight of the chinch- 

 bug, 29 Its migrations on foot, 30 Heavy rains destructive to 

 it, 30 Direct remedies, 31 Irrigation, 31 Preventive measures, 

 32 Burning, 32 Rolling, 33 Manuring and early sowing, 34 

 Mixing seed, 34 Preventing the migrati n of the bugs from one 

 tie d to another, 35 Importance of winter work and combined 

 action, 3fr Other possible remedies, 37 Abstaining from the 

 cultivation of grains 38 Natural enemies, 38; lady-birds, 39; 

 lace-wing fly and habits of its larva, 40 ; the insidious flower-bag 

 and the many-banded'robber, 41 Birds destructive to the chinch- 

 bug, 41 Discussion ot other proposed remedies and preventive 

 measures, 41 The chinch-bug injurious to stock, 43 Prognosti- 

 cating, 44 Unnecessary iears, 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 on the chinch-bug 51 



List of correspondents who replied to the circular, 51 Questions 

 answered by correspondents, 52 Answers given by correspond- 

 ents, 53. 



THE FLAT-HEADED APPLE-TREE BORER, Chrysobothris femorata 71 



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

 tory, 72 Natural enemies, 73 Chalcid larva, 74 The cherished 

 Bracou, 75 The useful Labena, 75 Ants, 76 Remedies, 76 

 Keeping youngtrees 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 Cat- 

 ting ont the newly-hatched larva, 79. 



CANKER-WORMS, Paleacrita vernata ; Anisopteryx pometaria 80 



Confusion regarding the two species of canker-worms, 80 Distin- 

 guishing characters of the spring canker-worm, 80 Description 

 of egg, larva, and chrysalis of Anisopteryx vernata, 82 How the 

 fall canker-worm differs from the preceding, 83 Description of 

 egg, larva, and chrysalis of Anisopteryx pometaria, 84 Practical 

 importance of distinguishing the two species, 85 Comparative 

 description of the spring and fall canker-worms, 86 Conclusion, 

 88 Extracts from the original essay on the canker-worm by 

 W. D. Peck, 89. 



THE GRAPE PHYLLOXERA, Phylloxera vastatrix - 90 



Completion of its natural history, 90 The true sexual individuals 

 discovered, 91 Epitome of the life-history of the grape Phyllox- 



