. Report of observations of injurious insects and common farm pests, during the year ... : with methods of prevention and remedy . ad gone down to change, was found to act so thatnot more than ten per cent, were alive, so far as examined subse-quently, in their cocoons. Kainite, applied from sprinkling with asmall quantity experimentally up to a heavy top-dressing, or atthe rate of over half a ton per acre on orchard land, had still better 126 SNAlIi-SLUG. [1899 effects. The maggots, in the instances examined, were found dead intheir cocoons. The cocoon in which the Pear Midge Maggot passesthe
. Report of observations of injurious insects and common farm pests, during the year ... : with methods of prevention and remedy . ad gone down to change, was found to act so thatnot more than ten per cent, were alive, so far as examined subse-quently, in their cocoons. Kainite, applied from sprinkling with asmall quantity experimentally up to a heavy top-dressing, or atthe rate of over half a ton per acre on orchard land, had still better 126 SNAlIi-SLUG. [1899 effects. The maggots, in the instances examined, were found dead intheir cocoons. The cocoon in which the Pear Midge Maggot passesthe winter (for it does not change to chrysalis in it until early spring)is spun of silk, covered with grains of sand, and, as the rather slightersilk cocoons of the Raspberry caterpillars appear to offer no betterdefence from action of surrounding chemicals, a trial of effect of anautumn dressing might be well worth while. Notes on the successfuleflect of kainite as a preventive dressing for Pear Midge infestationwill be found preceding, under this heading. SNAIL-SLUG. (BENEFICIAL.)Snail-slug. TestaceUa haliutidea, Testacella haliotidea.—1, Snail-slug, in motion; 2, contracted ; S, head, withtentacles, magnified ; 4, shell, upper and under side, slightly magnified ; 5, shell,much magnified ; C, egg. (4 and 0 from plate v. of Jefireys British Conchology,vol. i.; the other figures from specimens taken at St. Albans.) The Snail-slug greatly resembles several kinds of our commongarden and field Slugs, but is distinguishable from them by having asmall external shell placed near the end of the tail. From thiscircumstance of possession of a noticeable shell (although certainly itis a very little one) the creature takes its popular name of the Snail-slug ; but, so far as my own experience goes, the point which mostfrequently attracts attention to these Snail-slugs not being of the com-mon plant-eating kinds is their being found in the act of swallowing, 1899] SNAIL-
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