76 DRAGONFLIES OF NORTH AMERICA 
Kennedy found this species abundant at Donner Lake, Oregon, 
where he says (’17, p. 535) it is found on the gravel beaches. 
The males rest on the cobblestones scattered over the gravel or pursue each 
other in zig-zag flights along the lake shore. The females are not as numerous 
and are usually found seated on stones very close to the edge of the water. Here 
the males find them and take them back among the bushes in copulation. In 
morrisoni 
> 
ovipositing the female poises just over the water and as the wave passes beneath 
her drops the tip of her abdomen into the water raising it again as soon as the 
wave has passed. Emergence occurred between 10 in the morning and 4 in the 
afternoon. Usually the nymph crawled just above the wash of the waves. Robins 
caught many of the tenerals among the rocks. 
Asy 
Q 
Alt 

Kennedy has described (’17, p. 536) as O. morrisoni nevadensis a 
paler, desert inhabiting variety, in which the yellow dorsal and lateral 
spots are confluent at the base of the middle abdominal segments. 
19. Ophiogomphus howei Bromley 
Brom. ’24, p. 343: Calv. ’24, p. 345: Garm. ’27, p. 135. 
Length 33 mm. Expanse 43 mm. Me., Pa. 
A short stocky greenish species striped with brown. Face and occiput yellow. 
Thoracic stripes of the first pair confluent dilated toward the crest and narrowed 
forward. Stripe 2 free above and rather widely separated from 3, which is of 
equal width. Stripe 4 wanting above the spiracle, and forked below. Stripe 5 
complete, narrow, and with an inverted U before its lower end. Hind wings 
flavescent on the midst of their basal half, strongly in the female, faintly in the 
male, legs blackish, yellowish at base. The yellowish line of middorsal spots is 
wide on segment 2, abbreviated on the middle segments disappearing on 8 or 9. 
