ZOOLOGY. 209 



devouring small insects, and animalculae ; like the prece« 

 ding, the pupa has the rudiments of wings, but the larvce is 

 apterous. 



8. Aepa. Water-Scorpion. Snout inflected ; Tsings four, 



cross-wise, coriaceous on the upper parts ; fore-feet 

 formed for swimming ; the others for walking. 



An aquatic genus, agreeing in habits with the preceding. 



9. Cimex. Buo. Snout inflected ; antennce longer than the 



thorax ; wings four, folded, the upper pair coriaceous 

 at their bases ; back flat, with the Z^orax margined j 

 legs formed for running. 



10. Aphis. Plant-Louse. Snout inflected ; antennce longer 

 than the thorax ; wings either four, or wanting ; feet 

 formed for walking ; abdomen mostly furcished with 

 two horns or processes. 



There are but few plants that are not subject to the at- 

 tacks of this minute tribe of animals; they frequent the 

 leaves, stems, young stalks, and buds of plants, and trees : 

 their oeconomy was formerly little understood, but 

 the late Mr. William Curtis, who made this curious 

 family his particular study, has, in a paper published in the 

 sixth volume of the Linnean Transactions, given their history, 

 which is replete with highly interesting information. In this 

 place we shall merely remark, that at an early period of the 

 year, the young are produced alive, at another time, from au 

 egg, and that the female once impregnated, continues to pro- 



r 



