ODONATA OF THE VICINITY OF GO HOME BAY 61 



SESSIONAL PAPER No. 39b 



also common. Ischnura verticalis and Lestes disjunctus were also observed, the 

 latter in greatly reduced numbers. 



No changes were noted after this date. 



Geographical Distribution of the Species. 



Go Home Bay is situated at about the northern limit of the Transition (Al- 

 leghanian) Life Zone and its Odonate fauna thus exhibits an intermingling of 

 Boreal and Austral elements. Many of the species range a considerable distance 

 both north and south of this locality, being common to both the Canadian and 

 Carolinian Zones, and therefore occurjing throughout the Alleghanian (Transition) 

 Zone. A few Carolinian forms probably find the northern limit of their geograph- 

 ical distribution at about this latitude, while some of the characteristic species 

 of the Canadian Zone do not seem to occur much farther south. 



The species which are generally distributed in Ontario as far or farther than 

 the north shore of Lake Huron are the following: — 



1. Agrion maculatum. 



2. " aequabile. 



3. Lestes unguiculatus. 



4. " uncatus. 



5. " disjunctus. 



6. Chromagrion conditum. 



7. Nehalennia irene. 



8. Enallagma hageni. 



9. " carunculatum. 



10. Ischnura verticalis. 



11. Hagenius brevistylus. 



12. Gomphus lividus. 



13. " exilis. 



14. " spicatus. 



15. Dromogomphus spinosus. 



16. Boyeria grafiana. 



17. Basiaeschna Janata. 



18. Aeshna canadensis. 



19. " umbrosa. 



20. Anax Junius. 



21. Didymops transversa. 



22. Tetragoneuria spinigera. 



23. " cynosura simulans. 



24. Helocordulia uhleri (?). 



25. Dorocordulia libera. 



26. Sympetrum costiferum. 



27. " vicinum. 



28. " semicinctum. 



29. " obtrusum. 



