. Animal parasites and human disease. Insects as carriers of disease; Medical parasitology. 376 BEDBUGS AND THEIR ALLIES. 40 eggs at a time, all near the same stage of development, so they must undergo rapid increase in size shortly before being deposited. Girault, who has carried out extensive breeding experiments, saw one female lay 111 eggs during the 61 days that he had her in captivity, and another laid a total of 190 eggs. Often a female returns to lay more eggs in the same place so that batches of 40 or more can be found in the crevices where the adult insects hide. The eggs hatch in fr
. Animal parasites and human disease. Insects as carriers of disease; Medical parasitology. 376 BEDBUGS AND THEIR ALLIES. 40 eggs at a time, all near the same stage of development, so they must undergo rapid increase in size shortly before being deposited. Girault, who has carried out extensive breeding experiments, saw one female lay 111 eggs during the 61 days that he had her in captivity, and another laid a total of 190 eggs. Often a female returns to lay more eggs in the same place so that batches of 40 or more can be found in the crevices where the adult insects hide. The eggs hatch in from six to ten days during warm weather, but are retarded in their development by cold. A week of freezing temperature reduces the hatching to 25 per cent. The freshly hatched bugs (Fig. 167B) are very small, delicate and pale in color. After their first hearty meal they have a much more robust appearance, and grow rapidly. The skin is normally moulted five times before the final Fic. 167. Egg and newly hatched adult stage is reached, at least larva of bedbug. X 20. (After Mar- i , - <• i i • ij^^-t) one gluttonous teed being neces- sary before each moult in order to insure normal development and reproduction. Although apparently not necessary to its development, the bug may gorge itself several times between moults, at intervals of about one to six days. Marlatt found the average period of time between moults to ])e eight days. Allowing a similar length of time for the hatching of the eggs, the time occupied from laying of the eggs to maturity is about seven weeks. Girault has found the development from the hatching of the eggs to maturity to take place in as short a time as 29 days. On the other hand, starvation, cool temperatures and possibly other conditions may drag out the period of development to great length. Bacot found that the newly hatched larvae could live unfed four and a half months and with one feed for nine months. The several larval stages of the insect
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmedical, bookyear1918
