HYMENOPTERA 



39 



Formicina, the ants. Many 

 species with high social develop- 

 ment. 



Sphecina, the digger wasps. Soli- 

 tary in their habits. A large group, 

 including many families. 



Vespina, the true wasps. One 

 group is soUtary and another social. 



Apina, the bees. Various habits, 

 but all collect pollen or honey to 

 feed their young. 



The number of described species of Hymenoptera is in excess of 

 30,000. 



Fig. 41. — A bee, Bombus. Original. 



