TRANSACTIONS OF MICROSCOPICAL SOCIETY. 
DESCRIPTION OF PLATE II, 
lUustrating Mr. Dobson's paper on Lerp. 
Fig. 
1. _-Ova of Psylla ? 
2. — Larvae constructing the conical crusts of lerp. 
3. — The scaled form of lerp. I , 
4. — The Psylla which affords the white lerp, 
5. — Different forms of yellow lerp. 
6. — The species of Psylla which produces the yellow lerp. 
7. — The various species of Psylla affording lerp. Nat. size. 
8. — Portion of the edge of a crust of yellow lerp. Magnified 30 diameters. 
9. — Hairs on the crusts. 
a. Towards the apex. 
b. Towards the base. 
