612 EXPLANATION OF THE PLATES. 
TIG. 
1 1. Alitrunk and part of tegmina and wings of Fulgora later- 
naria. Postfra?num funiculate, with an elastic part 
marked a. Vol. III. p. 558. 
12. ■ hemelytra and wings of Pentatoma. 
13. i wings of Panorpa. 
14. - — ■ Trichoptera. 
15. ■< ' > ■— Lepidoptera. Geometra. 
16. ■ — Lepidoptera. 
17. ■ Diptera. 
1 8. Wing of Chermes Fraxini. 
19. Tegmen of Loeusta. 
20. Issus. 
21. Wing. Cercopis savguinolenta. 
22. ■ Loeusta. 
23. Hemelytrum of Reduvius ? 
PLATE XXIX. a 
1. Gills of a spider. (Treviran.) 
Scorpio europceus. (Ibid). 
3. Aeriducts of larva of Ephemera fusco grisea. (De Geer.) 
Vol. IV. p. 58. 
4. ■ vespertina. (Ibid.) Ibid. 
5. ■ • vulgata. (Ibid.) Ibid. 
6. ■ Sialis lutaria. (Ibid.) Ibid. 
7 . Thread-like ditto of the upper and under side of the larva? 
of Trichoptera. (Ibid.) Ibid. p. 56. 
8. Part of the body of the larva of a Libellula, laid open to show 
the trachea?. (Reaum.) a. a. a. Tracheae. Vol. IV. p. 66. 
9. Part of the imago of ditto. (Ibid.) a. Vesicles that 
terminate the trachea?, b. Oblong ditto. Vol. IV. p. 68. 
10. Pupa of Corethra culiciformis. (De Geer.) a. b. Vesicles 
connected with the trachea?, c. Tail. Vol. IV. p. 67. 
1 1 . Part of the head of Armadillo zonatus. a. Pseudo-spiracle. 
Vol. III. p. 493. 
a Vol. IV. Letter XXXVIII. 
