174 H.Asiii.ujiiTS ON NATTKI 



to a moie diaracteristic feature, common to wasps 

 with the whole bee family. 



All these cousins p by common descent 



the usual four wings of well-regulated insects. 

 Hut it so happens that the habits of the i 

 make strong and certain flight more practically 

 important for them than the mere power of aCrial 



NO. IJ. PART OF TWO WINGS, WITH HOOKS AND GROOVES. 



coquetting and pirouetting possessed by the far 

 less business-like butterflies. Your wasp and your 

 bee are women of business. They have therefore 

 found it pay them to develop a mechanism by 

 which the two wings on either side can be firmly 

 locked together, so as to act like a single pinion. 

 No. 13 very well illustrates this admirable plan 

 for fastening the fore and hind wings together. 



