. Entomologie économique pour l'agriculteur et le producteur de fruits, et pour l'utiliser comme un texte-livre dans les écoles et les collèges agricoles ;. Les insectes ; les parasites. 242 Une entomologie économique. club est abrupte à la pointe et pas dessiné dans un crochet ou recourbé. Dans les skippers, ou Hesperids, la tête est large, les yeux sont relativement petits, les palpeurs sont largement séparées, situé près des yeux, et terminé par une pointe effilée qui est souvent recourbé ou accroché. Une grande série de la vrai papillons se distingue en ayant les antérieures de pieds plus ou moins abandonnée ou imparfaites, et ces, la "brosse-

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. Economic entomology for the farmer and the fruit grower, and for use as a text-book in agricultural schools and colleges;. Insects; Pests. 242 AN ECONOMIC ENTOMOLOGY. club is abrupt at the tip and not drawn out into a hook or recurved. In the skippers, or Hesperids, the head is broad, the eyes are comparatively small, the feelers are widely separated, set close to the eyes, and terminated by a pointed tip which is often recurved or hooked. A large series of the true butterflies is distinguished by having the anterior pair of feet more or less aborted or imperfect, and these, the "brush-footed " butterflies, are classed in two families, Fig. 251. 00^ Fig. 252. ^ a, head of Papilio, show- ing where antennae are in- serted ; b, same of an Hesperid.. a, foreleg of a brush-footed butterfly entirely aborted ; b, o{ Lyccena, male, tarsus one-jointed. the Nyniphalidcc, containing moderate-sized or large species, and the LyccenidcB, containing small species, in which the colors are blue or coppery, or have the under sides marked with fine, thread-like lines. They are the "blues, " "coppers, " and " hair-streaks." Among our most common species of the first family is the "milk-weed butterfly, " Danais archippus, quite a large red- brown insect, with the wing-veins broadly black marked. It becomes abundant in late summer and foil, and its caterpillar, green in color, marked with black lines, and furnished with rather long, black, hair-like tentacles, may be often seen feeding upon milk-weeds. This species will serve to typify the family to which it belongs, and is easily raised by any one curious to watch its transformations. If the caterpillar be confined with a sufficient supply of fresh leaves, it will grow to about an inch and a half in length, will then fasten itself by means of its hind feet to a little pad of silk, and will change to a chunky, bright-green chrysalis, or pupa, marked with small golden spots, one of the pre

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