Gomphus villosipes—1, dorsal view of male
appendages; 3, vulvar scale; 5, hamule; 7, occiput
of female; 8, occiput of male.
Gomphus furcifer—2, dorsal view of male appendages;
4, hamule; 6, vulvar scale; 9, occiput of male; 10,
occiput of female.
Gomphus viridifrons—11, 12, 13, dorsal view of
male appendages—13 from Pa., 11, 12 from Ohio;
14, 15, 16, hamules; 17, 18, vulvar scales—18 from
Pennsylvania, 17 from Ohio.
Gomphus brevis—19, 20, 21, dorsal view of male
appendages—specimens from Maine and Pennsylvania;
22, 23, 24, hamules; 25, 26, vulvar scales.
Gomphus abbreviatus—27, 28, 29, hamules; 30, 31,
vulvar scales; 32, 33, 34, dorsal view of male
appendages—specimens all from Maine.
[Illustration: _Plate 5._