xu 



CONTENTS. 



Diving Water-Spider .... 



Observations of M. Clerck 

 Cleanliness of Spiders . . 



Slructiiie of their claws 



Fanciful account of them patting their webs 



Proceedings of a Spider in a sleam-buat 

 CHAPTER XIX. 



Stnictiires of Gall-flies 



Berry-gall of the oak-leaf, &c. . 

 Ingenious mechanism of the ovipositor . 



Opinions of Naturalists as to the cause of Galls 



Bedeguar of the rose 

 Arliclioke-gall of the oak . 



Leafy-gall of Dyer's broom 



Rose willow . . • ' 



Rose-hawthorn 



Woolly-gall of the oak 



Experiments with the flies 



Oak-apples 



Root-galls of the oak . 



Woody-gall of the willow 



Oak currant-galls 

 Weevil-Gall .... 



Weevil gall of the hawthorn 



Anbury on the roots of cabbages, &c. 

 Semi-Galls of Aphides 



Mountain-ash leaf-galls 



Poplar semi-galls of the cottony aphis . 

 Leaf-rolling Aphides 



Leaf of the currant-bush thus altered 



Shoot of the lime-tree thus convoluted 

 Pseudo-Galls .... 



Pseudo-gall of the bramble 



• hawliiorn 



.. Scotch fir 



CHAPTER XX. 



Animal-Galls .... 



Enlluipiasm of M. Reanmjr for study 



Ovipositor of BrefZf-Flies 



Opinion of Mr Bracey Clark on its use 



Effects produced by the fly upon cattle 



Observations ot" I.-nr vfiis on lue Rein-deer Breeze 



Opinion ot Kirbv and Spence 



Observations of Mr B. Clark 



Halchir)g of the egg 



Bumps, or wuibles, thence produced 



Cominuiiicalion ol" the gnib with the air 



Final cause of these bumps 



The Zimb rBreeze-fly i ) of Africa 



Human Breeze-fly 

 Grub parasite in the Garden-Snail 



Fly 



