[1050] Marcel de Serres thinks he has discovered an organ of hearing in most insects, but he does not state its situation. Mém. du Mus. 1819. 99. Treviranus, with regard to the Blattina, suspects it to be situated between the eye and the base of the antennæ, perhaps alluding to the spot noticed above. (Vol. III. p. [505].) Carus, who mentions the above, says, "Is it not reasonable to ask if the sense of hearing may not reside in the membrane which connects the antennæ with the head?" Introd. to Comp. Anat. i. 80—.

[1051] Lehmann De Sens. Extern. Anim. Exsang. De Olfactu.

[1052] Cuv. Anat. Comp. ii. 675.

[1053] Ubi supr.

[1054] Marcel de Serres says they are connected with testes seated in the trunk (Mem. du Mus. 1819. 95); but Treviranus denies this (Arachnid. 36—. t. iv. f. 33).

[1055] Vol. II. p. [361]—. III. p. [544]—.

[1056] Lehmann De Sens. Extern. &c. De Olfactu.

[1057] Lehmann ubi supr. &c. 27.

[1058] Ibid. and De Usu Antenn. ii. 24—. Cuv. Anat. Comp. ii. 675.

[1059] Lehmann De Usu Antenn. ii. 28.