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this family will supply abundant material ; and if our own 

 especial group in the Fauna list should not be enough, we 

 have only to go to Guiana, the Brazils, and the islands of 

 Florida, where these strange little creatures may be met with 

 in the most beautiful, at the same time weird and fantastic 

 shapes; while, to come nearer home, Geoffroy, the historian of 

 the insects of the environs of Paris, while describing Centrotus 

 cormitus, calls it " Le Petit Diable," or " Little Devil," and at 

 the present time this group is known all over the Continent 

 as " Geoffroy's Little Devils.'*' The Cercopidae proper and the 

 Tettigonise are very extensive and beautifully coloured long, 

 or rather parallel insects. They are represented in this 

 country by two genera and two species only : Tricophora 

 sanguinolenta and Tettigonia viridis, but they abound in South 

 America and in Asia. 



Our smaller species such as Typhlocyba, Alebra, Cybus, 

 Eupteryx, Gnathodus, etc., are extremely beautiful little crea- 

 tures, while to come further on, which of us is not acquainted 

 with our active little saltatorial friend, Aphrophora Spumaria, 

 the common Frog-hopper of our little town gardens. How 

 many of us and how often have we been annoyed by seeing 

 our plants infested by a larva, which carries on his depreda- 

 tions and robs our plants of its juices while artfully concealed 

 and enveloped in a mass of white froth, closely resembling 

 saliva. De Geer, the celebrated Swedish naturalist, wishing 

 to know how the larvae produced this frothy dwelling, says 

 he took one of them out of its home, wiped it dry with a 

 camel's hair brush, and placed it on a young stalk of honey- 

 suckle, placed in a glass of water to keep it fresh. It began, 

 he says, by fixing itself on a part of the stalk, into which it 

 inserted its trunk, and remained a long time in this attitude, 

 occupied in sucking and filling itself with the sap. Having 

 then withdrawn its trunk, it remains there, or else places itself 

 on a leaf, where, after different reiterated movements of its 

 abdomen, which it raises or lowers and turns on all sides, one 

 may see coming out of the hinder part of its body a litlle ball 

 of liquid, which it causes to slip along, bending it under its 

 body. Repeating again the same movement it is not long in 

 producing a second globule filled with air like the first, which 



