Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . rged. larva is mining continues green; and by these greenblotches on the leaves we often readily detect thepresence of the larva, which is of a very pale green,with a pale brown head. When full-fed, it quits the Aug. 1,1867.] HARDWICKES SCIENCE-GOSSIP. 173 leaf, and descends to the surface of the ground, andspins its small silken cocoon, in which it changesto the pupa state; and iu the following month ofJune, the little moth emerges from the cocoon, andmay be found sitting on the tr
Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . rged. larva is mining continues green; and by these greenblotches on the leaves we often readily detect thepresence of the larva, which is of a very pale green,with a pale brown head. When full-fed, it quits the Aug. 1,1867.] HARDWICKES SCIENCE-GOSSIP. 173 leaf, and descends to the surface of the ground, andspins its small silken cocoon, in which it changesto the pupa state; and iu the following month ofJune, the little moth emerges from the cocoon, andmay be found sitting on the trunks of oak-trees. Itis barely a quarter of an inch in the expanse of thewings; the fore wings are black, with two nearlyopposite triangular whitish spots in the we call Nepticula subbimaculeila (fig. 178). In the months of May and June, we ofen findlarge brown blotches on the leaves of hawthorn;and, on holding one of these leaves up to the light,we see that the entire green portion of the leaf hasbeen eaten away, nothing- being left but the upperand lower cuticles of the leaf; where these brown. Fig. 179. Mined Hawthorn Leaf, and Larva of Co!eophoranigricella, natural size, and magnified. blotches are, moreover, we see in the lower cuticlea small round hole. On some leaves we may findattached a small brown cjdindrical object, abouthalf an inch long; this is the portable habitation,or case, formed by the larva which has mined thehawthorn leaf, and its mode of proceeding is asfollows: it fastens its case to the underside of aleaf, and bites the round hole in the lower skin ofthe leaf, and then proceeds to devour the fleshygreen portion of the leaf. By degrees it eats thegreen portion of the leaf away all round the spotwhere its case is fastened, but carefully leaves theskins of the leaf unbroken ; and as it comesfurther and further out of its case as the minedspace becomes larger, and as it has to reach to agreat distance for some of the green substance ofthe leaf, i
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