INSTINCT OF INSECTS. 323 



which they are armed, are in like manner auxiliaries, suppl}dng 

 the want of powerful locomotive organs. But there is still an- 



*., The Pupa of the Uragon-fly, with its mask extended — b, the same, with tlie mask closed, 

 and discharging- a current of water. 



other class of predaceous larvae which are compelled, in order 

 to obtain their own food, to resort to actual stratagems for 

 this purpose, which the more developed structure of the pre- 

 ceding insects rendered unnecessary. The constructions of 

 the spider, and especially the mana?uvres of the jumping spi- 

 ders, so constantly to be noticed on every sunny wall, leap- 

 ing from a considerable distance upon their prey, will also 

 occur to the reader ; but these have been more especially 

 noticed in preceding pages. 



The larva of a somewhat rare British species of the Lin- 

 naan genus Cimex {Reduvius jiersonatus), is asserted to feed 

 upon the bed-bug ; like it, it is found in houses, but its ap- 

 pearance is so extraordinary, that it is impossible to have the 

 least idea that it is an insect, were it not for its slight and 

 awkward movements. It covers itself completely with a coat 

 of dirt and dust, so that it more resembles a lump of earth. 



