Note 411 — LETTER XXX. (continued 2)
Reading edition
De Geer ii. t. xiv. f. 7. &c. The caterpillar of P. G. Scratiotata L. like those of Phryganeæ, has these respiratory threads. Ibid. i. t. xxxvii. f. 2-6. De Geer has described the larva of a Phryganea L. which is without any respiratory threads, ii. 569. t. xv. f. 10.