. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 26 THE REP ORT OF THE The following table, which I have made up from the last five completed volumes of the Canadian Eatonioloyisl, will give an idea of the usual length of the egg stage of insects :— Colias interior, 6 or 7 days, Lyman, Vol. XXIX., No. 11. EpirrmUhns obfirmaria, 13 days, Fyles, Vol. XXIX., No. 11. Brephos infans, 8, 9, or 10 days, Brainerd, Vol. XXIX , No. 11. Trigoiiophora periculosa, 10 days, Fyles, Vol. XXXI., No. 2. Euprepia caja, 9,days, Gibson, Vol. XXXII., No. 11. Arc
. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 26 THE REP ORT OF THE The following table, which I have made up from the last five completed volumes of the Canadian Eatonioloyisl, will give an idea of the usual length of the egg stage of insects :— Colias interior, 6 or 7 days, Lyman, Vol. XXIX., No. 11. EpirrmUhns obfirmaria, 13 days, Fyles, Vol. XXIX., No. 11. Brephos infans, 8, 9, or 10 days, Brainerd, Vol. XXIX , No. 11. Trigoiiophora periculosa, 10 days, Fyles, Vol. XXXI., No. 2. Euprepia caja, 9,days, Gibson, Vol. XXXII., No. 11. Arctia phahrata, 7 or 8 days, Gibson, Vol. XXXII., No. 12. Xylina Bethunei, about 14 days, Lyman, Vol XXXIII., No. 1. Fhlyctienia , 14 days, Fletcher & Gibson, Vol. XXXIII., No. 5. Arctia lurgmicula, 7 or 8 days, Gibson, Vol. XXXIII., No. 12. The most remarkable egg period that has come under my notice is that of Pamphila Mani- toba. Thi egg stage of ^this insect lasts for eight months. In the year 1894, on the 8th day of August, I witnessed the laying of a batch of the eggs. On the 20th day of April, in the follow- ing year, I saw the tiny larvae bite their way to freedom from the shells in which they had lived so long. The other stages of the insect's life were completed within four months—in less than half the period of the egg stage. m, i i ? ?, ?, • • i-m Ihe larval period also varies in diner- ent species. It is the insect's feeding time. In the case of a Bombyx, it is the time when sufficient nutriment must eb assimilated, to sustain the insect through all its after Some larvae are quickly " full fed," and go directly after into chrysalis. Others spend the Winter in a state of torpidity, and complete their growth in the Spring. Such, for instance, are the larva? of Melifn^a Harrisii Scudder. These are oT'^^garioni in the Fall, and may. Fi<f. 10. Caterpillar anJ Chrysalis of a Cossus. be seen'^apparently tangled) up in dirty- l
Size: 2025px × 1234px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsectp, bookyear1872
