id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
inhs-298	Forbes, Stephen	The General Entomological Ecology of the Indian Corn Plant	1927	13	.pdf	application/pdf	5513	149	46	Such adaptations to corn as we get glimpses of are almost without exception adaptations to considerable groups of food plants, in which corn is included—some of these groups select and definite, like the families of the grasses and the sedges to which the chinch-bug is strictly limited, and others large and vague, like the almost unlimited food resources of the larvje of Lachnosterna and Cyclocephala under ground. Those fixed peculiarities of habit or behavior which adapt an insect to one food plant or class of food plants rather than to another we may call synethic adaptations, in the absence of any existing word applicable in this sense; local adaptations are those in which the usual haunts and places of resort of an insect species, how- ever determined, bring it into common contact with an available food ])lant, the frequency of this contact being quite independent of the de- gree of the fitness of such plant for its food ; biographical adaptations are those based on a correspondence between the life history of the in- sect and its organic food supply, such that the latter shall always be ac- cessible in sufficient quantity to meet the varying needs of the dependent insect at the various stages of its growth ; and numerical adaptations are the consequence of such an adjustment of the rate of insect multiplica- tion to the plants or animals of its food that only the unessential surplus of this food shall be appropriated, its maxinuini essential product being left undiminished.	cache/inhs-298.pdf	txt/inhs-298.txt