2976 THE JOINTED ANIMALS 



terrible havoc with our corn crops and garden produce. On the other hand, it 

 must be confessed that the larvae of the sawflies often work damage to the foliage 

 of forest trees, while in many tropical climates ants are a devouring scourge to all 

 that belongs to man. 



We must now leave these introductory lines, but before passing on 

 Classification . . , , > , , ,. r , . 



to a more or less detailed description of certain species and their pecu- 

 liar characteristics of structure and of habit, the subjoined outline of classification 

 of the various families of the order will give a general idea of the different groups, 

 which are more obviously separated by certain broad distinguishing characteristics. 



Order HYMENOPTERA 



Suborder SESSILIVENTRES. 



1 . Family TENTHREDINID^ Sawflies. 



2. " SIRICID^ Wood Borers. 

 Suborder PETIOLATA. 



Section PARASITICA. 



1 . Family CYNIPID^ Gall Wasps. 



2. " PROCTOTRYPID^; Egg Wasps. 



3. ' ' CHALCIDID^ Parasitic Gall Wasps. 



4. ' ' ICHNEUMONID^E I/arge Larvae Wasps. 



5. " BRACONID^; Small Larvae Wasps. 



6. " EvANiiDyE Hymenoptera Parasites. 



7. " CHRYSIDIDJE Burnished Wasps. 

 Section ACULEATA. 



1. Family FORMICID^ Social Ants. 



2. " MUTILUD^ Parasitic Ants. 



3. " 



4. " 



5. " SAPYGID^- 



6. " BEMBICID^ 



7. " POMPILID^ Spider Wasps. 



8. " SPHEGID^; Locust Wasps. 



9. ' ' 



10. " 



11. " CRABRONID^; Fly and Aphid Wasps. 



12. " PmLANTHiDvE Audrena Parasites. 



13. " MASARID^E Solitary Wasps. 



14. " EUMENID^; Mud Wasps. 



15. " VESPID^B Paper Wasps. 



1 6. " ANDRENID^ Solitary Bees. 



17. " APID^; Honeybees and Humblebees. 



