The coarse annules of the cuticle bear rows of minute, refractive dots
on each border. The single wing is of the submerged type with crenate
borders like that figured for ornatus.
The three paris of cephalic probolae reach to a point mdiway on the
labial probolae. The labial probolae are bifurcate almost two-thirds
their length and their slender outer teminal branches are slightly recurved.
The membranes of both cephalic and labial probolae are acute and elongate
triangular. Cutinous points are present in the cephalic sutures at
the bases of the labial probolae. The three posterior sets of pharyngeal
plates are usually inconspicuous but on some specimens the dorsal plates
appear quite prominent. There is a distinct median swelling of the
esophagus and the cardiac bulb is large and strong. The ovary is
doubly reflexed on the dorsal side of the body. The tail is irregularly-conoid
to the anus. No males have been seen among about fifty specimens.
Found in the mountains of Utah at elevations of from 10,000 to 12,000
(Description- Thorne, 1925)