. Transactions of the Entomological Society of London. pecimens is 105 mm., whichis very close to the maximum of the graph. The resultsappear to indicate that a certain proportion of the nymphsare hatched out before the normal size is attained. Hence25*5% of the hatchings, i. e. those under 10 mm. in length,might be expected to undergo one ecdysis more than thosehatched out above that length; but this does not occurin so far as my experience goes, for such undersized nymphsas I have kept under observation went through the samenumber of ecdyses, i. e. six, before arriving at the sameperfect sta
. Transactions of the Entomological Society of London. pecimens is 105 mm., whichis very close to the maximum of the graph. The resultsappear to indicate that a certain proportion of the nymphsare hatched out before the normal size is attained. Hence25*5% of the hatchings, i. e. those under 10 mm. in length,might be expected to undergo one ecdysis more than thosehatched out above that length; but this does not occurin so far as my experience goes, for such undersized nymphsas I have kept under observation went through the samenumber of ecdyses, i. e. six, before arriving at the sameperfect state as those hatched 10 mm. long or over. When newly hatched nymphs are placed on the upperside of a leaf they behave in various ways, viz. they rarelyfeign death, they remain stationary, or they walk to theedge of the leaf and attach themselves to the underside,or in their struggle to get away they run off in an excitedmanner with the abdomen curled over backwards (very D^R*M To Illustrate LEnqTH of °qz u,^ on ^.^ ^ ^ 2^4 quantityof Larvae OF LARVAE. loiqTH g &s 9 95 10 (OS364 The Growth and Habits of Carausius morosus. 365 different from their position in the egg), and tumble offthe leaf; but generally they bend the head down, bringingthe mouth close to the surface of the leaf as though in searchof food. This search ultimately proved to be a searchfor moisture, which when found is imbibed with the nymphs remain quietly imbibing waterfor as long as seven minutes, at other times much less, andat times only imbibing when their mouth was pushed intothe moisture previously placed on the leaf. It was in watching this imbibition that it became obviousto me that within a few hours of hatching out the nymphsrapidly increased their length by several millimetres perday, average 2*7 mm. in 24 hours. Further examination showed that whether moisture wasimbibed or not the increase was, with few exceptions,general. Of 164 newly hatched specimens put underob
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Keywords: ., bookauthorr, bookcentury1800, booksubjectentomology, bookyear1836
