[2121] Amouroux Insectes Venimeux, 44.

[2122] Observations Nouvelles, &c. Mém. du Mus. viii. 177.

[2123] N. Dict. d'Hist. Nat. xii. 370.

[2124] Descr. de six Arachnides, &c. Annales Gen. des Scienc. Phys. 1820. 19. t. lxix. f. 7. d.

[2125] Anatom. Compar. i. 450.

[2126] Anatom. Compar. i. 451.

[2127] De Geer notices something of the kind in Cimbex femorata. ii. 947.

[2128] It was omitted to be observed, when the supposed pneumatic pouches in the genus Vespa were mentioned (see above, p. [585]), that they have also a very conspicuous metaphragm, as probably have most Hymenoptera, to which the muscles that move the wings are attached.

[2129] Plate [IX.] Fig. 13. is the tendon, G´ the aperture in the abdomen C, and a, the aperture in the trunk B.

[2130] Plate [XV.] Fig. 11. Linn. Trans. xii. t. xxii. f. 16.