Note 264 — LETTER XXX.
Reading edition
Plate XXI. Fig. 9. The organ with which the larvæ of Hemerobius, Myrmeleon, and Hydrophilus, spin their cocoons, is situated in the anus. The spinneret of the Cossus is figured by Lyonnet Anatom. t. ii. f. 1. i. and fig. 9.