No. 39] ODONATA OF CONNECTICUT: GOMPHIDAE 



131 



Inferiors either without strongly upturned teeth or the margin 

 between the teeth very irregular ; internal angles of inferiors 

 entire • carolus 



Inferiors with strongly upturned teeth, the margin between them 

 regular in fully mature specimens ; inferiors appendages with 

 tuberculate internal angles mainensis 



anomalus 



Fig. 14. Ophiugoiiiphus, structural details, i. O. carolus, anal append- 

 ages. 2. 0. rupinsulensis, anal appendages. 3. O. aspersus, anal append- 

 ages. 4. O. vtainensis, anal appendages. 5. O. anoinalus, anal appendages. 

 6. O. johannus ? vulvar lamina of supposed female in collection of Phila- 

 delphia Acad. Nat. Sciences. 7. Occiput of same. 8. O. rupinsulensis, 

 occiput. 9. O. aspersus, ventral view of anal appendages. 10. O. anomalus, 

 accessory appendages, lateral view. 11. O. aspersus, accessory appendages 

 in lateral view. 



Females 



Occiput with long, usually contiguous spines (Fig. 16, A) 2 



Occiput without long contiguous spines 3 



Terga 8 and 9 with U-shaped spots anomalus 



Terga 8 and 9 without U-shaped spots mainensis 



