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PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 52. 



six to eight broad blunt teeth, these directed proximad and the series 

 graduated distad. (See figs. 348-349.) 



Figs. 342-352.-Octogomphus specularis, nymph. 342-346. Nymphs. 347. Head. 348. Mentum. 

 349. Mental detail. 350. Male, appendages. 351-352. Female, appendages. 



Dorsal surface of prothorax with an elevated semicircular flat area 

 in the center of which are twin tubercles. No supracoxal processes, 



