204 Description of the Plates. 



in the Articulata generally, Pliil. Trans., for 1857, vol. 147, 

 PP' 95~99' for tlie structure of the ova, pseud-ova, ovaria, 

 and pseud-ovaria of Insects, iUd, 1858, vol. 148, pp. 341-360, 

 1 861, vol. 151, pp. 620-623; for the functions and structure 

 of the tracheae, Linn. Soc. Trans., 1865, vol. xxv., p. 480; 

 and for the subject of insect-metamorphosis generally, ibid., 

 pp. 485-491- 



For the asexual propagation of Diptera, which takes place in 

 larvae, and was at first supposed to do so by metagenesis inde- 

 pendently of any ovarium or pseud-ovarium, see N. Wagner, 

 Zeitschrift fur Wiss. Zool., xiii., 1863, p. 513 ; Pagenstecher, 

 I.e., xiv., 1864, p. 410; Leuckart, Wiegman's Archiv., 1865, 

 p. 286, translated in the Ann. and Mag. Nat. Hist., iii., 17, 

 March, 1866. 



For an account of the internal and external anatomy of the order 

 Orthoptera and of the family Blattinae, see Fischer, Orthop- 

 tera Europea, pp. 5-32, pp. 84-88, pis. i., ii., and vii. 



For an account of the receptacula seminis, see Siebold in Miiller's 

 Archiv., 1837, p. 408. For the opening of these and the 

 other ducts of the reproductive apparatus, see Huxley, Linn. 

 Soc. Trans, ii., vol. xxii., p. 231, 1858. 



For number of joints in antennules of Crustaceans, see Spenc, Bate, 

 British Sessile-eyed Crustacea, Introduction, p. xi. ; and for 

 correspondence of the antennae of Insects, with iriperfect 

 metamorphosis both in the larval and in the adult state with 

 the antennules of Crustacea, see Zaddach, Die Entwickelung 

 des Phryganiden Eies, p. 86. 



For the anal respiratory apparatus of the Libellulidae, which may 

 be considered to be foreshadowed in the longitudinal folds 

 developed upon the rectum of the Cockroach, see Dufour, 

 Ann. Sci. Nat., Ser. iii., torn, xvii., 1852, p. 6^, pis. iii., iv., v.; 

 Leydig, Lehrbuch der Histologic, p. ^^y. 



