On Floivers and Insects. 



119 



ciple of an eel-trap, having an entrance closed with 

 a flap which permits an easy entrance, but effec- 

 tually prevents the unfortunate victim from getting 

 out again. 



8. I will only allude to one foreign case, that of 

 the Sarracenia. In this genus some of the leaves 

 are in the form of a pitcher. They secrete a fluid, 

 and are lined internally with hairs pointing down- 

 wards. Up the outside of the pitcher there is a line 

 of honey glands, which lure the insects to their des- 

 truction. Flies and other insects which fall into 

 this pitcher cannot get out again, and are actually 

 digested by the plant. Bees, however, are said to 

 be scarcely ever caught. 



