Bulletin . - illustrations of the social habit. In Aug-ust, 1901, Ifound at College Hill, Ohio, a colony of caterpillars of thelo-moth, Autonierisio^ feeding on cherry. This species hasa remarkable habit. During- the early period of its larvalexistence it is greg-arious. This habit is propabh- for mutu-al protection, as the body is coA-ered with sting-ing- the caterpillars have occasion to change their feedingplace, they move to another part of the tree in single file :and so closeh does the head of the one join the posterior endof the one in front that the procession appears as on
Bulletin . - illustrations of the social habit. In Aug-ust, 1901, Ifound at College Hill, Ohio, a colony of caterpillars of thelo-moth, Autonierisio^ feeding on cherry. This species hasa remarkable habit. During- the early period of its larvalexistence it is greg-arious. This habit is propabh- for mutu-al protection, as the body is coA-ered with sting-ing- the caterpillars have occasion to change their feedingplace, they move to another part of the tree in single file :and so closeh does the head of the one join the posterior endof the one in front that the procession appears as one longgreen worm. Thus they are able to keep together until eachcan shift for itself. When about half-grown, they separate,and each works out alone the problem of its destiny. PROTECTION. In order to maintain itself against enemies, nearly everyspecies is provided with certain means of protection. ThesemaA- be classified as protective devices, protective resem-blance, and Fig. 18. Protective device of Basket Moth. Sketch by MlSS StUCKEY. Protective devices.—These include any adaptation ofstructure or any contrivances b} which protection is nettling spines of the lo-moth. the scent organs of thePapilios, and the hair of man} caterpillars are protective adap-tations of structure. The webs of certain larvae, such as thatof the Fall Web-worm and that of the Carpenter Moth, are -36- devices to secure protection. Consult Pig. 18. The larvaof Papilio troilus draws the Sassafras leaf over it and fastensit down with silken threads. Some feign death whendistvirbed, while others wriggle and fall into the g^rass. TheSpring Canker Worm, when disturbed, falls into mid-air sus-pended by a silken thread. Few birds could capture it in thatposition. Protective reseinbhiiiee.—This is illustrated when anyspecies imitates the form or color of auA adjacent natural ob-ject for the sake of protection. The Leaf-butterflies of Indiaresemble the form an
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