[291] De Geer ii. 667, 675.
[292] Reaum. vi. 394—.
[293] Reaum. vi. 394—. Cuv. Anat. Comp. iv. 440—. N. Dict. d'Hist. Nat. xvii. 540—.
[294] Plate [XXIX]. Fig. 9. a, b. Reaum. vi. 418—. 450.
[295] Cuv. Anat. Comp. iv. 441.
[297] Sprengel Comment. 17. t. iii. f. 24.
[298] Ibid. t. i. f. 11.
[299] Sur le Vol des Ins. c. ii. 336. note 1.
[300] Sprengel Comment. 13—. These oscula or pores in the straw of Triticum hybernum, as figured by Mr. Bauer's admirable pencil, (Sir J. Banks On the Blight, &c. t. ii. f. 3.) exactly resemble the spiracles of insects.