An Introduction to Entomology: Vol. 4 / or Elements of the Natural History of the Insects

by William Kirby; William Spence

[271] Lyonet Anat. 103.

[272] Ibid. Cuv. Anat. Comp. iv. 438. This author says that the intermediate tunic is the spiral thread (437).

[273] Lyonet 102.

[274] Ibid. 104. Sprengel Commentar. 17.

[275] Lyonet 104. Sprengel Commentar. 17.

[276] Lyonet 102. Malpigh. De Bombyc. 12. Reaum. i. 130.

[277] Swamm. Bibl. Nat. t. ii. f. 7.

[278] Lyonet 411.

[279] Professor Kidd (Philos. Trans. 1825. 235.) conjectures that the tracheæ, as well as air-vessels, may possibly be blood-vessels; but this hypothesis is inconsistent with the fact recently discovered by Dr. Carus, of a circulation, by other means, in larvæ. See Carus Introd. to Comp. Anat. &c. ii. 400.

[280] N. Dict. d'Hist. Nat. xvii. 541. Reaum. vi. 397. Plate [XXIX]. Fig. 8. shows three of them at a.