xu 



CONTENTS, 



Diving tt'ater-Spider .... 



Observniions of M. Clerck 

 Cleanliiiess of Spiders 



Sliuctuie of tlieir claws 



Fanciful account of them patting (lieir webs 



Proceedings of a Spider in a steam-boat 

 CHAPTiill XIX. 



Structures of Gall-flies 



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



Ingenious irechanism of the ovipositor 



Opinions of iMaturalists as to tlie cause ' 



Bcdegnar of the rose 



Arlichoke-g^ill of tlie oak . 



Leafy-gall of Dyer's broom 



Rose willow 



Rose-hawtliorn 



Woolly- gall of the oak 



Sxperimeni^ with the flies 



Oi:k-apples 



Root galls of the oak . 



Woody-gall of the willow 



Oah cuirant-galU 

 Weevil-f;^ll .... 



Ueevilgr-11 of the hawthorn 



Anbury on the roots of cabbages, &e. 

 Semi-Galls of Aphides 



Mounidin-asb leaf-galls . 



Poplar semi-galls of the cottony aphis 

 Leif-roHing Aphides 



Le;if of the curranl-bii !i thus altered 



Shoot of the lime-tree liius convoluted 

 Pseudo-Galls 



Psiudo-gall of the bramble 



hawthfirn 



— Scotch fir 



CHAPTER XX. 

 Animal-Galls 



Entliusiasm of M. Reaumur for study 

 Ovipositor of Breezr-Flies 

 Opinion of Mr Bracey Clark on its use 

 Effects produced by ihe fly upon cattle 

 Observations of l/nina-us on the Rtin-deer Breeze-Fly 

 Opiriion of Kirby and Spence 

 Observations of Mr B. Clark 

 lialching of the egg 

 Bump", or wurbli'8, ihence produced 

 Communication ol ih-^ grub with llie air 

 Final cause of thc^e huinps 

 The Zimb rBreeze-fly ; ) of Afri-a 

 Human Brep^e-fly 

 Grub p.it^^ite in tha Gardeu-Snail 



