C. pecYmalis may be readily diftliiguifhed from its Congeners by the remark- 

 able change it undergoes when dried ; it then turns to a greenifh afh-colour, and 

 fhines as if covered with gum-water. In that ftate it adheres firmly to either 

 glafs or paper. 



A. C. peftinalis, magnified, 2. 



B. Ditto, 1. 



