OPHIOGOMPHUS 71 
10. Ophiogomphus phaleratus Needham 
Ndm. ’02, p. 277; Mtk. Cat. p. 85: Kndy ’17, p. 543 (as occidentis). 
Length 50 mm. Expanse 62 mm. Ore., Calif. 
A handsome yellowish species striped with brown and with a brown abdomen 
that is half ringed and tipped with yellow. Face and occiput yellow. Thoracic 
stripes of the first pair divergent at the lower end of the carina, widened down- 
ward. Stripe 2 complete, widest in the middle and with bowed anterior border, 
confluent above with 3 and with the brown of the crest, separated from 3 below 
by a narrow pale line. Stripe 4 obsolete except for a dash at the extreme ends. 
Stripe 5 an obscure and narrow line in the bottom of the suture. An inverted 
U-shaped mark joins the lower ends of 4 and 5. Legs brown, yellow at base and 
on the outer side of the tibiae. The middorsal line of pale spots on the abdomen 
is abbreviated on the middle segments, where the bright yellow is surrounded 
by black U-marks opening forward; 9 is mostly and 10 wholly yellow. The moder- 
ately expanded side margins of segments 7 to 10 are yellow bounded by brown 
externally on 7 and 8. Appendages yellow. 
Kennedy (17, p. 543) records finding this species emerging in abun- 
dance from the Columbia River at Umatilla, oregon on July 13, 1913. 
11. Ophiogomphus occidentis Hagen 
Hag. ’82, p. 173: Ndm. ’99, p. 238. 
Length 53 mm. Expanse 68 mm. B. C., Wash., Utah 
This species is barely distinct from O. severus, but has a little better develop- 
ment of thoracic stripe 1; the black of the abdomen is darker and there is less 
yellow toward the tip; the superior appendage of the male is less pointed, and the 
notch in the anterior genital hamule more square. 
12. Ophiogomphus aspersus Morse 
Morse 795, p. 209: Mtk. Cat. p. 83: Howe ’23, p. 129: Garm. ’27, p. 182. 
Length 48 mm. Expanse 60 mm. N. Y., Mass. 
A greenish species with narrow stripings of brown on the thorax and with 
black feet. Face and occiput greenish. Thoracic stripes of the first pair present 
or absent; when present narrow, separate, abbreviated in front, convex ex- 
teriorly, being narrowed to both ends, conjoined with the brown of the crest 
above but isolated below. Stripe 2 isolated at both ends well separated from 3, 
which is broader and arches forward to join the crest above the free end of 2. 
Stripe 4 is wanting above the spiracle, and of 5 there is hardly a trace. Legs 
pale to near the knees, then brown, the tibiae yellow externally, and the tarsi 
black. Wings hyaline; costa yellow; stigma tawny. 
Abdomen brown, with the usual middorsal line of yellow spots that are 
triangular on segments 3 to 5, subquadrate on the basal third of 9, and full length 
lanceolate on 10. Appendages black. 
The senior author observed this species at Saranac Inn, N. Y., 
where it was common. Many imagos of both sexes were observed 
