ZOOLOGY. 



209 



(ievouring small iasscts, and anioialculae ; like the prece- 

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

 apterous. 



S* Aepa, Water-Scorpion. Snout inflected ; wings 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. 



i. Cimex. Bug. Snout inflected ; mtennce longer than the 

 thorax * wings four, folded, the upper pair coriaceous 

 at their bases ; back flat, with the thorax margined ; 

 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 r^ostly furnished 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 ceconomy 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 thig 

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

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

 and that the female once impregnated, continues to pro- 

 p 



