Explanation of Plate ). 



Drag-on Flics and tfeeir N-^mpl)s.* 



1. Nymph of Dromogomphus spinosus Selys 



2. Nymph of Gomphus scudderi Selys 



3. Nymph of G. brevis Selys 



4. Nymph of G. spicatus Selys 



5. ■ Nymph of Ophiogomphus aspersus Morse 



6. Nymph of Lanthus parvulus Selys 



7. Nymph of Hagenius brevistylus Selys 



8. Aeschna constricta Say 



9. Nymph of Didymops transversa Say 

 10. Gomphus scudderi Selys 



•All from photos by Dr J. G. Needhar 

 512 



