TWO YOUNG NATURALISTS. 



he captured the fly with his finger and thumb. " Now 

 we can see: say thirty, perhaps forty." 



"You are very far out. The number of strokes 

 of the wings of a fly is about six hundred per second, 

 and may reach as many as three thousand six hundred 

 during rapid flight; is not that surprising?" 



KAT-TAILED WOEMS (LARVAE OF Jlcluphi, Kaj, AND J.nli bA-vU 

 INSECT IX TOE PERFECT STATE. 



c Here are some other kinds of Diptera : Volucella, 

 a wild creature resembling a humble-bee, and who 

 moreover takes advantage of this to obtain entrance 

 into the nest of the bee, where it deposits its eggs, 

 which when hatched devour those of its host; the 

 Helophili, whose larvae were named by Eeaumur 'rat- 



