ORDER HYMENOPTERA. I 5 



Section 3. Diplopiera. 



Family 3. Vespidse or Social Wasps. 

 ,, 4. Eumenidse or Bramble Wasps. 

 ,, 5. Masaridx or Solitary Wasps. 



Section 3. Fossoj-es. 



Family 6. Philanthidas or Bee-eating Wasps. 



,, 7. Crabronidse or Sand Wasps. 



J. 8. Nyssonidae or Fly-eating Wasps. 



,, 9. Larridse or Black Wasps. 



,, 10. Sphegidse or Grasshopper-eating Wasps. 



,, II. Pompilidae or Burrowing Wasps. 



,, 12. Bembecidae or Scented Wasps. 



,, 13. Sapygidce or Bees' Nest Wasps. 



,, 14. Scoliidae or Beetle-eating Ants. 



,, 15. Thymidse or Stout-bodied Ants. 



,, 16. Mutillidse or Solitary Ants. 



Section 4. Heterogyna. 

 Family 17. Formicidse or Social Ants. 



Tribe II. Entomophaga. 



Family 18. Cympid^ or Gall Flies. 



,, 19. Chalcididae or Little Gall Flies, 



J, 20. Proctotrypidse or Bee Parasites. 



„ 21. Braconidse or Butterfly Parasites. 



,, 22. Ichneumonida; or Ichneumon Flies. 



„ 23. Evaniidse or Beetle Parasites. 



.,, 24. Chrysidida^ or Golden Wasps. 



Tribe III. Phytophaga. 



Family 25. Sericidte or Tailed Wasps. 

 ., 26. Tenthredinidce or Saw Flies. 



Tribe I. — Aculeata. 



The Aculeata contains the great majority of the Hymetioptera. 

 Their principal characteristic is that the ovipositor of the female 

 in most of the groups is modified into a sting. The laTc'CB are 

 footless grubs. This tribe is divided into four sections, which are 

 again subdivided into seventeen families, each of which it is our 

 intention to discuss in their proper order. 



Section I. — AtiiJwphila, 



Family i, Aphidcc. — This family contains the numerous species 

 of honey bees which are familiar to all of us. They are very 



