132 BIBLIOGRAPHY OF ECONOMIC ENTOMOLOGY. 



I 



1127. KILEY, C. V. Continued. 



The Southern grass- worm, Laphygma frugiperda 41 



It resembles in habits the veritable army-worm, 41. 



The true army-worm 41 



Its past history, 41 Rev. Powers's accountof its invasion in the New 

 England States in 1770, 42 Accounts of later invasions previous 

 to 1861, 43 Years of its appearance in Illinois, 43 The invasion 

 of the year 1861, 44 Its appearance in Missouri in 1869, 44 Its 

 sudden appearance and disappearance, 45 Reason for the ap- 

 parently sudden appearance, 45 Army- worm years are wet with 

 the preceding year dry, 46 Reason for the increase and decrease 

 of the number of worms, 46 Its natural history, 47 Previous ac- 

 counts of its natural history, 47 When the eggs are laid, 47 

 Where they are laid, 48 Misdirected instinct in insects and 

 birds, 48 Exceptions to the normal habit of the worm, 48 Color 

 of the worm, 49 The chrysalis and imago, 49 Parasites, 50 ; 

 the red-tailed Tachina-fly, 50; its beneficial work, 50; it in- 

 fests also other insects, 50 ; Walsh's description of the fly, 51 ; it 

 has been redescribed as Exarista oaten sackenn, 51; the yellow- 

 tailed Tachina-fly, 51 ; description of the fly, 51; the glassy Me- 

 sochorus, 52; the diminished Pezomachus, 52; the military 

 Microgaster, 52 ; the purged Ophion, 53 ; the army-worm Ich- 

 neumon-fly, 53 Habits of the army-worm and suggestions for 

 its destruction, 53 Burning grass meadows in winter or early 

 spring, 54 Plowing late in the fall, 54 The marching of the 

 worms, 54 Plants they prefer, 04 They become beneficial by 

 devouring the chess in the fields, 55 Ditching, 55 Description 

 of the insect as larva and imago, 56. 



INSECTS IXFESTIXG THE SWEET- POTATO 56 



Tortoise-beetles 57 



The clubbed tortoise-beetle affects the Irish potato, 56 Its gen- 

 eral appearance, 57 Characteristics of tortoise-beetles, 57 

 Merdigerous habits of tortoise-beetles and others of the same 

 family, 58 General appearance of the larvie, 58 Their dung 

 parasol, 59 Larval molts, 59 Egg of tortoise-beetles, 60 The 

 chrysalis, 60 Habits of and injury done by the beetles, 60 Rem- 

 edies, 61. 



The two-striped sweet-potato beetle, Cassida bivitlata 61 



It seems to be confined to that plant, 61 The larva and the use of 

 its fork, 61 Its pupa and imago, 61. 



The golden tortoise-beetle, Coptocyda aurichaJcea 62 



Food-plants and characteristics of the larva, 62 Brilliant color of 

 the beetle, 62. 



The pale-thighed tortoise-beetle, Coptocyda aurichalcea 62 



It is hardly distinguished from the foregoing species, 62. 



The mottled tortoise-beetle, Coptocyda guttata 63 



Characteristics of the beetle, 63 ; of the larva, 63. 



The black-legged tortoise-beetle, Cassida nigripes 63 



Characteristics of the imago and larva, 63. 



THE PICKLE-WORM, Eudioplis nitidalis 64 



Other insects infesting cucurbitaceous vines 64 



The squash-borer, 64 It seems to be confined to the Eastern States, 

 64 The striped cucumber-beetle, 64 Injury done by the beetle, 

 64 ; by the larva, 65 The larva and pupa, 65 Number of annual 

 generations, 65 Remedies, 66 Extent of the injury caused by 

 it, 66 The 12-spotted Diabrotica, 66. 



