1915] 
Muttkowski and Whedon: Gomphus Cornutus 
91 
Fig. 2. Gomphus cornutus Tough. 
A, lateral view of head of female; o, occiput, s, spine or “horn.” B, 
anterior view of female head. C, Dorsal view of head of nymph. D, 
labium of nymph. E, anal appendages of male. F, ventral view of fe- 
male abdomen, showing vulvar scale. 
