384 



ORDERS OP PTILOTA. 



may have but a very slight influence upon the general struc- 

 ture of the insect; thus between the humble bee and 

 the parasitic humble bee (Psithyrus), there is so little 

 general variation of structure, that Mr. Curtis even 

 doubts the propriety of their generic separation, whilst St. 



HonbU bee (Bombut Lapidariui) with jaw. of the male and female. 



Fargeau, looking at their different instincts, places them in 

 totally distinct sections, regarding the slight modification of 



Neit of Ike Humble-hee recently commenced ; a, 

 which are placed the eggi ; c, waxro envelope coi 



covered entr 



A, waxen cell* in 



form in the legs (dependent, it is true, upon the pollinigerous 

 or parasitic habits of the different insects), of far higher im- 

 portance than that entire variation of structure which sepa- 

 rates such families as the working bees and wasps, which are 

 united together by the common tie of sociality. As regards 



