Science-gossip . Fig. 1%.—Ixodes hixagmius. Length mm. a dorsalaspect. l> in balsam, c capitulum enlarged, e coxa offore leg. d tarsus of fore leg. individuals received were partially-distended females,and distended larvae and pupae. Some were sent tome by Mr. Pocock on February 7th, and were keptalive on damp sand and moss in the usual way. OnApril 29th, after eleven weeks and four days, it wasdiscovered that two of the larvae had undergone theirmetamorphosis, but one larva remained unchanged. Whilst the total length of the ticks is little altered,other considerable changes have taken
Science-gossip . Fig. 1%.—Ixodes hixagmius. Length mm. a dorsalaspect. l> in balsam, c capitulum enlarged, e coxa offore leg. d tarsus of fore leg. individuals received were partially-distended females,and distended larvae and pupae. Some were sent tome by Mr. Pocock on February 7th, and were keptalive on damp sand and moss in the usual way. OnApril 29th, after eleven weeks and four days, it wasdiscovered that two of the larvae had undergone theirmetamorphosis, but one larva remained unchanged. Whilst the total length of the ticks is little altered,other considerable changes have taken place. Theshield is greatly enlarged, the rostrum and palpilengthened, and not only has the fourth pair of legsappeared, but the others are much developed. A con-. Fig. 17.—Ixodes hexagonus. $ partly distended. siderable alteration has also taken placein the intestinalmarkings, which seem to have reappeared in the-larva (previously all black), as the time of metamor-phosis approached. The exact day on which itoccurred was not observed. Distended ticks in allstages become very sluggish, attempting to escapenotice by feigning death ; but in this case, so soon-
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Keywords: ., bookcentury1800, booksubjectnaturalhistory, booksubjectscience
