. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 29 " From these notes, from my own recollections and from the recollections of my chil- dren, I infer that Mttoes make their appearance about the middle of August, that they pair and oviposit before the winter sets in, and that they never survive the winter; and_ that they are very seldom, if ever, found under stones in the neighbourhood of ; Prof Riley has made some observations on Epicauta viitata. He describes the eggs of rittala as follows : Length, 008 inch, five times as lon
. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 29 " From these notes, from my own recollections and from the recollections of my chil- dren, I infer that Mttoes make their appearance about the middle of August, that they pair and oviposit before the winter sets in, and that they never survive the winter; and_ that they are very seldom, if ever, found under stones in the neighbourhood of ; Prof Riley has made some observations on Epicauta viitata. He describes the eggs of rittala as follows : Length, 008 inch, five times as long as wide, elliptical and so uni- form in diameter that it is difficult to say which is the anterior end, though there is a slight difference. Egg sometimes very slightly curved. Colour, very pale whitish yel- low, smooth and shining. The young larva is yellowish-brown, borders of head and tliorax and of joints some- what more dusky than general surface; tip of jaws and eyes dark brown. Legs and venter paler ; venter not corneus except at sides and across segments eleven and twelve. About ten stiff hairs visible superiorly on the posterior border on the middle segments, with a cone-like prominence at the base of each, and six minor bristles in front of them. Then' are also rows of fainter ventral Ijristles. The curious history of these insects throws some light on the fact that while in some localities they are enormously abundant one season, they will be very scarce another. It is to be expected that there would be an alternation between the abundance of certain species of hymenopterous insects and cantharides. When the insects they prey on are abundant the blistering beetles multiply amazingly, and during this immense multiplica- tion exhaust the stock of material on which they feed to such an extent that a year of creat abundance in any given locality can scarcely fail to be followed by a season of cor- responding scarcity. In other, and sometimes adjacent localities, where
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsectp, bookyear1872
