228 MINUTE MARVELS OF NATURE 



sheath, I think that the statement will readily 

 explain itself. 



In concluding we may just glance at the 

 dragon-flies, whose larvae of many various kinds 



Fig. 152. Larva of a drdgon-fly. 

 x 3 diameters 



are to be found in all ponds. These insects, of 

 which one of the larger species is shown in Fig. 

 151, have a fearful reputation as horse-stingers, 

 and are not infrequently called hornets and 

 severely left alone on that account. As a 

 matter of fact they are quite incapable of 

 stinging, as they possess neither stings nor 



