EXPLANATION OF THE PLATES. * XV 



PLATE IV. 



Fig. 1. Sphseria on the leaf of an elm. 



A. A portion enlarged, and the cuticle parting. 



B. The same enlarged, representing the capsules. 

 Fig. 2. Sphaeria bifrons, on a laurel leaf. 



C. The front, and dorsal parts. 



D. Imbedded capsules. 



Fig. 3. Sphaeria coryli, on a nut branch. 



E. The tubercle enlarged, bordered with the epidermis. 



F. A section of the capsules at the base. 

 Fig. 4. Sphaeria faginea, on a beech stick. 



G. Section of a tube, with the capsules at the base. 

 H. Group of the tubes detached from the bough, with 



their capsules. 

 I. A tube detached. 



PLATE V. 



Fig. 1 . A chrysalis of an insect. 



B. The inner hood. 

 Fig. 2. The male glowworm. 



D. Under side of the head, representing the hood- 

 winkers, and eyes. 

 Fig. 3. The branch of an apple tree, infested with the aphis 



lanata. 



B. The aphis enlarged, wjlth the globules, and the cot- 

 ton that surrounds them. 



D. The early appearance of the insect with its ter- 



minating bristle. 



E. Appearance of the creature in winter. * 

 Fig. 4. Eggs of the snake. 



