THE FROTHING HOPPER 177 



Tendril-bearers. 



Vetch Leguminosas. 



Bryony ...... Cucurbitaceae. 



Vine Vitaceae. 



Virginia Creeper .... do. 



Passion-flower Passifloraceae. 



Hook-climbers. 



Bramble Rosaceae. 



Briar (wild rose) . do. 



Cleavers . . . . . Rubiaceae. 



Root-climber. 

 Ivy Araliaceae. 



(12) The number of eggs produced depends upon the risks 

 to which the developing animal is exposed ; in the sea the 

 risks are much greater than in fresh waters. Both Cyclas 

 and Anodon as freshwater animals might be expected to 

 produce few eggs. This is true of Cyclas, but Anodon has 

 developed a singular kind of temporary parasitism ; its 

 young attach themselves for a time to the fins of fishes 

 and tadpoles. The opportunities for so attaching them- 

 selves are very precarious, and many must fail to develop 

 because no fish has come within reach ; hence the great 

 number of eggs which Anodon produces, very unlike in 

 this to most freshwater animals. 



XXXII. THE FROTHING HOPPER. 



Never surely was a common native insect so ill off for an 

 English name as this. Cuckoo-spit, which is best known, 

 suggests a ridiculous fable ; frog-hopper, which Kirby and 

 Spence employ, is almost equally unmeaning, though less 

 nauseous. Fabre, to whose French readers Cicada is a 

 familiar word, has coined the pleasing name of Cicadelle, but 



M 



