[223] Reaum. v. 40. t. vi. f. 4-15.
[224] Müller, the Danish zoologist, relates, that he once met with a papilio which, with the true wings of the genus, had a head without antennæ or tongue, furnished with mandibles; and, in short, that of a true caterpillar. It was a female, which deposited eggs that proved barren. If this solitary instance was not a mistake, is it possible that some parasitic larva had devoured only the inclosed head of the butterfly, or so injured it that it could not reject the hard skin of the larva, and yet not be destroyed?
[225] The only larvæ which have a visible distinct neck are those of some Dytisci, Staphylini, and a few others, in which this part is quite distinct: proving the erroneousness of the opinion of those German entomologists, who consider the thorax as analogous to the neck of other animals, and hence call it Halsschild. In some lepidopterous larvæ, however, as in that of Pieris Brassicæ, though no visible neck presents itself, one is very perceptible when the insect stretches the head forward considerably. Reaum. i. 460.
[227] Reaum. v. t. vi. f. 7. i. c.
[228] In fact, in almost all Lepidopterous larvæ the head may be regarded as divided into two lobes or eye-shaped portions, which include in the angle formed by their recession anteriorly from each other, the nasus (clypeus F.), the labrum, and other instruments of manducation. Posteriorly these lobes generally come into contact; but I have a specimen in which there is a narrow space between them.
[229] Ins. Surinam. t. xvii.
[230] Ins. Surinam. t. liii.
[231] Ibid. t. xxxii.
[232] Ibid. t. viii.