Introduction to
章节目录
共 53 段- His next set of circles shows the sub-division of these five
- _Nervous System_. A small bilobed brain crowning a double, k
- The _head_ of insects is clearly analogous to that of verteb
- Mr. William MacLeay has with great truth observed: "The true
- The only insects certainly known to spin an egg-pouch like t
- iii. _Substance._ From this long dissertation on the _situat
- The period of exclusion does not, however, depend solely upo
- 1. _Head._ This, as was lately observed, is exteriorly of a
- One of the most remarkable prepensile instruments, in which
- ii. Prolegs only (many _Tipulidæ_, and some subcutaneous
- 1. _A carnivorous hexapod larva, with an elongate linear fla
- Of the pilose larvæ, some, like most of those of the smaller
- In these the new skin, I imagine, is formed under the old fr
- Most of these, having reached their selected retreat, requir
- The most usual _colour_ of silken cocoons is white, yellow,
- When a larva has finished its cocoon,--which with some speci
- [492] A caterpillar nearly answering to the description of t
- 3. The abdomen-case consists of _nine_ segments when viewed
- The duration, then, of an insect's existence in the pupa sta
- I am next to give you some account of the _second_ mode in w
- When the insect has quitted the exuviæ of the pupa, it has a
- In a moth called the ghost (_Hepialus Humuli_), the posterio
- In nothing do the sexes differ more materially than in the
- But the part of the leg in which the sexes most vary is the
- [813] Ibid. _t._ i. _f._ 2.
- 2. POSTNASUS (the _Postnasus_). That part of the _Face_ imme
- C METASTERNUM (the _Metasternum_). The central and often
- [1010] PLATE VIII. FIG. 3, 4, 12-14, 16, 17. IX. FIG. 1, 3,
- i. With regard to its _substance_--the head may be said in g
- 2. _Labium_[1189].--On the under-side of the head, and oppos
- But with regard to their _kind_, it will be best to adopt th
- 7. _Lingua_[1313].--This name was applied by Linné to the pa
- ii. _Proboscis_[1374].--Linné long since, and after him Fabr
- I am next to mention a part of the nose which merits a disti
- As to their _structure_,--when seen under the microscope the
- In considering the _insertion_ of antennæ, by which I mean t
- i. _Jugulum_[1579].--This part, which may be regarded as ana
- [1506] _Flata phalænoides_ F. and affinities have no stemmat
- 6. With respect to the _clothing_ of the _prothorax_, I have
- 3. _Scutellum_[1658]. Some writers on the anatomy of insects
- 9. _Postdorsolum_[1695]. The first external piece of the _me
- 1. _Antefurca_[1754]. The first portion of the _endosternum_
- 6. _Appendages._ These, though not so remarkable as those of
- 4. As to their _position and folding in repose_, _Hemelytra_
- Having made these _general_ remarks, I shall now consider
- 6. We are next to consider the _clothing_ of wings: these, i
- 7. [Illustration: dots] Anterior pair distant from the two p
- As to its _figure_ and _shape_--most commonly the _tibia_
- We are next to say something upon the _shape_ of the _tarsi_
- [1760] PLATE XXII. FIG. 6. a.
- ii. _Articulation with the trunk._ Two distinct modes of thi
- In spiders, as we learn from Treviranus, the open _ventral_
- 7. Boatshaped ditto, of _Tortrix prasinana_. Ibid. p. 221.