. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 5G ENTOMOLOGICAL SOCIETY OF ONTARIO. Mr. Bailey .-arefully couuteJ the -r-ggs in the cvarie*-: of t' moths, with the following results : ncy of these female No. 1 8. 9. 10, 158 No. 11 Ill 272 «' 12 160 127 " i;^ 193 184 '' 14 » 131 213 " ir. 281 " Ki 242 140 " 17 116 220 '?? IcS 281 200 •' 19 192 ,130 ??' 20 217 It will be seen from this table that the average number of eggs found in each moth is 185. Mr. Bailey is very positive, from his continuous field observations, that
. Annual report. Entomological Society of Ontario; Insect pests; Insects -- Ontario Periodicals. 5G ENTOMOLOGICAL SOCIETY OF ONTARIO. Mr. Bailey .-arefully couuteJ the -r-ggs in the cvarie*-: of t' moths, with the following results : ncy of these female No. 1 8. 9. 10, 158 No. 11 Ill 272 «' 12 160 127 " i;^ 193 184 '' 14 » 131 213 " ir. 281 " Ki 242 140 " 17 116 220 '?? IcS 281 200 •' 19 192 ,130 ??' 20 217 It will be seen from this table that the average number of eggs found in each moth is 185. Mr. Bailey is very positive, from his continuous field observations, that each chickadee will devour on the average thirty female canker-worm moths per day from the 20th of March until the 15th of April, provided these insects are plentiful. If the. Fig. 30. (.Vspidu-ca splendoriferella.) average number of eggs laid by each female is 185, one chickadee would thus destroy in one day 5,550 eggs ; and in the twenty-five days in which the canker-worm moths " run" or crawl up the trees, 138,750. It may be thought that this computation is excessive, and it is probable that some of the moths were not captured until they had laid some of their eggs, but the chickadees are also busy eating these eggs. When we consider further that forty-one of these insects, distended as they were with eggs, were found at one time in the stomach of one chickadee, and that the digestion of the bird is so rapid that its. 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 Entomological Society of Ontario; Ontario. Dept. of Agriculture. Toronto, The Society
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsectp, bookyear1872
