62 
Ohio Naturalist. 
[ Vol. 1, No. 4 
The abdominal appendages of the male are different. P'rom 
dorsal view those of furcifer are rectangular with the inner distal 
angle very much produced inward and backward; in villosipes they 
are wide at base, oblong, with the outer distal part broadly rounded 
and the corresponding inner part produced directly backward. The 
hamules are characteristic and maybe explained best by reference 
to the figures. 
The two species are colored much alike but furcifer is darker- 
The tenth abdominal segment may be said to be yellow in both 
but in furcifer the sides of the segment are dark, oftentimes black. 
They agree in habits, both preferring to fly over stagnant water 
where the males come to rest on floating objects or on the ground at 
the water’s edge. I have observed the female of furcifer ovipositing 
in stagnant water among lily pads and other aquatic plants. Her 
flight is slow while thus engaged, and her actions more like a Libel- 
lula than the usual Gomphus. 
EXPLANATION OF PLATE. 
Gomphus villosipes— 1, dorsal view of male appendages ; 3, vul- 
var 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 abbreviates— 27, 28, 29, hamules; 30, 31, vulvar scales; 
32, 33, 34, dorsal view of male appendagages — specimens all from 
Maine. 
