NATURAL HISTORY. 65 



And here is a picture of the lancet or knife 

 of a horse-fly. 



" We have now reached the bridge, and 

 here we must part ; your homes are in one 

 direction, and mine is in the opposite. I hope, 

 however, that you have learned something in 

 our morning's walk." 



" We have, Uncle Philip, and we thank you 

 much, and bid you, good day." 



" Good day, boys." 



