. Annual report. Entomological Society of Ontario; Insect pests; Insects. But these insects are few in number, and so widely scattered, that they do little, if any, harm. The one exception is Pieris rapce Linnseus, the " cabbage-butterfly " (Fig 2). This is an exceedingly troublesome insect. The "best method to check its ravages that I know is to set an intelligent child to work to pick off the caterpillars (Fig 12 a) from the plants, and to crush them under foot. The chrysalids (Fig 12 b) of this species, and of others, may often be found attached to fences and buildings. I lat
. Annual report. Entomological Society of Ontario; Insect pests; Insects. But these insects are few in number, and so widely scattered, that they do little, if any, harm. The one exception is Pieris rapce Linnseus, the " cabbage-butterfly " (Fig 2). This is an exceedingly troublesome insect. The "best method to check its ravages that I know is to set an intelligent child to work to pick off the caterpillars (Fig 12 a) from the plants, and to crush them under foot. The chrysalids (Fig 12 b) of this species, and of others, may often be found attached to fences and buildings. I lately had the opportunity of witnessing the proceedings of a Fapilio brevicauda larva when about to change to a chrysalis. It spun, on the side of a twig, a little pad, to which it attached itself, having climbed into a proper position for doing so. When it had settled itself, it turned its head to its back and ejected, through its mouth, a drop of mucous which it drew out in a silken thread, and attached to the twig. It then turned its head round on the other side, and deposited another drop on the same spot, drawing it out and fastening it as before, thus making a complete loop. The ends of this it strengthened with a branching web. Having completed its arrangements it curved its shoulders, drew in its head, and remained quiescent for two or three days—that is, till its loop and other fastenings were firm and dry. Then its skin was rent at the thorax, and, by a succession of heaving and swaying motions, was worked back, segment by segment, till it reached the extremity or oremaster, from which, in a little while, it fell away, leaving a delicate green chrysalis with a row of yellow knobs on either side, and with pretty salmon-coloured Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Entomologica
Size: 1139px × 2194px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
