IV TABLE OF CONTENTS. 



CHAPTER n. 



NATI-RAL HISTORY 292 



Nomenclature :, popular names, 292; scientific classification, 292 ; synonym, 

 292. Geographical distribution, 293. Food plants : Identity of corn and 

 boll worms, 294 ; on tomatoes, 295 ; on garden peas, 296 ; chick-pea, 296 ; 

 cow-pea, 298; string-beans, 297; Lima bean, 297; Erythrina herbacea, 

 297 ; pumpkin, 297 ; red pepper, 297 ; squash, 297 ; rose mallow, 297 ; glad- 

 iolus, 297 ; on Indian corn, hemp, tobacco, and lucerne, in Europe, 297. 

 The egg : description, 297 ; number of eggs laid by one female, 298 ; time 

 and place of depositing the eggs, 298 ; duration of egg state, 299. The 

 larra: habits of young larva, 299; description cf young larva, 299; di- 

 versity of color in larvae, 301 ; habits of mature larvae, 301 ; carnivorous 

 propensities of boll-worm, 303. The chrysalis, 304. The moth : variation 

 in markings, 306 ; time of flight, 306 ; food, 306. Number of broods, 307 ; 

 corn-bnd worms, 307 ; second brood, 307; third brood, 308; fourth brood, 

 308 ; fifth brood, 308 ; variations, 309. Influence of weather, 309. 



CHAPTER III. 



REMEDIES 311 



Natural remedies, 311; topping, 312; poisoning, 312; hand-picking, 312; 

 rotation of crops, 313 ; destruction of chrysalides, 314 ; destruction' of 

 moths, 315. 



PART III. 



NECTAR AND ITS USES o!9 



Early use of the word nectar, 319; modern definitions Linnaeus, Gray, 

 Sachs, Dclpino, Dartvin proposed definition, 320; structure of nectar 

 glands, 320 ; nectar either floral or extra floral, 320 ; homology and situation 

 of glands, 321 ; use of floral nectar ; example, the cotton flawer, its structure, 

 nectar, and visiting insects, 321 ; extra floral nectar of Coronilla varia, and 

 its use, 323; of the bonnet squash, 323; of Passiflora incarnata, 323; of 

 Marcgravia nepenthoides, 323; of Poinseftia pulcherrima, 324 ; of the invol- 

 ucre of Gossypium, 324; of the cow-pea, 325; honey dew, 326 ; glands on. 

 the serrations of certain leaves, 326 ; on the phyllodia of Acacia magnifica, 

 326 ; on the leaves of Gossypium, 327 ; on leaves of the bonnet squash, 327 ; 

 nectar, protoplasmic bodies, and hollow thorns of Acacia sphaerocephala 

 and their use, 327; nectar on leaves and bracts of Cassia occidentalis, 328 ; 

 on leaves of species of Sarracenia, Darlingtonia, and Nepenthes, 328 ; classifi- 

 cation of nectar according to its uses, 329 ; tabular representation of this 

 classification, 329; habits of ants, 330; destructiveuess to vegetation of 

 leaf-cutting species, 330 ; nocturnal activity of some, 330 ; means by which 

 plants are protected from their attacks, 330 ; greater secretion of glands 

 of cotton by night than by day, 331 ; supposition that it might be hygro- 

 scopic, 331; error of this supposition, explanation of the phenomena 

 attending it, 331 ; injury done the plant by attracting moths of Aletia and 

 Heliothis, 331 ; this injury only in recent times, 332 ; why natural selection 

 does not remove the glands on account of this fhjury, 332 ; why natural 

 selection should remove their activity if their secretion is a drain on the 

 strength of the plant, 332 ; their activity in prolific varieties of cotton an 

 indication that the secretion of nectar taxes the vital force of a plant but 

 little, 332 ; why active nectar glands in other species exist long after their 

 utility has ceased, 332; use of glands of cow-pea, 332; habits of bees, 

 wasps, ants, and humming-birds in visiting nectar-secreting plants, 333 ; 

 brief summary bibliography, especially of articles written in. the English 

 language, 333. 



