. Bulletin. Agriculture -- Ontario. LIFE HISTORY. The insects, as already mentioned above, pass the winter in the small black circular immature stage. In this stage hoth males and' females are alike. After the warm weather comes in the spring the male scales begin to elongate until they become oblong, and as described on page 9. (See Fig. 3Ca.) Towards the latter part of May (this year May 20th or 21st), the living insects beneath the scale covers have become winged, and back out from beneath the cover. Fig. 5 shows the appearance of one of these male adults, but is of course much enlarged, si
. Bulletin. Agriculture -- Ontario. LIFE HISTORY. The insects, as already mentioned above, pass the winter in the small black circular immature stage. In this stage hoth males and' females are alike. After the warm weather comes in the spring the male scales begin to elongate until they become oblong, and as described on page 9. (See Fig. 3Ca.) Towards the latter part of May (this year May 20th or 21st), the living insects beneath the scale covers have become winged, and back out from beneath the cover. Fig. 5 shows the appearance of one of these male adults, but is of course much enlarged, since the insect itself is so small that it can only with difficulty be seen without the aid of a hand lens. The general color of the body is orange. There are only two wings each with two veins in it. The antennae are long and conspicuous, and, projecting from the end of the body, is a long style, which makes it very easy to distinguish the male from tiny parasites or other small insects. (Any winged parasites that might be found would have four wings instead of two.) Soon after emerg-. Fig. 4. Full-grown female from beneath scale, showing the very long sucking tube, composed of several tiny bristles; greatly enlarged. (After Howard and Marlatt.) ence the males move around in search of the females. The latter then begin to increase in size, and towards the middle of June have reached the size and appear- ance described on page 9. (See also fig. 3A.) They now begin to give birth to living young, no eggs being laid hy this species, contrary to what we find in the case of most other scales, even very closely allied species. Each female produces several young a day, and may continue to do this for 40 or 50 days, so that the total number of young from each may be over 400. (At St. Catharines young larvae began to appear this year on June 25th, and last year, 1912, on July 1st. June 20th is probably about the average date). For a few hours after birth the young larvae remain by the mo
Size: 1676px × 1490px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorontariodeptofagriculture, bookcollection, bookyear1905
