HEMIPTERA. 



139 



The larva is active ; its body is ringed, and bears 

 a pair of antennae, three pairs of thoracic legs, and 

 caudal appendages. In about three days the larva 

 becomes fixed, and eleven days afterward has lost all 



Fig. 83. 



power of locomotion, the thoracic legs, together with 

 the antennae having disappeared. The scale is con- 

 structed in its outer part of the moulted skins of the 

 animal which are not cast off, but are retained in place 

 and held together by a gummy excretion. The eggs 



