. Bulletin. Natural history; Natural history. Sciiti'iiilK-r l'',?7 PRISON: DESCRIPTIONS OP STONEFLIES 91 ));itti.'iii of dorsum of head and pronotum as in rig. 79. Subgenital plate, fig. 79, well developed but only slightly extending over ninth sternite, posterior margin essential!) straight witii corners angulate. Allotype, female.—Cultus lake, B. C, Sweltzer creek: Apr. 28, 1935, W. E. Ricker. (J HEAD AND PRONOTUM. Fig. T). — Uy,iroperl,i parallela. Other records for this species which ha\ c accumulated since it was originalh de scribed are as follows: British — Cultus lake: Apr.
. Bulletin. Natural history; Natural history. Sciiti'iiilK-r l'',?7 PRISON: DESCRIPTIONS OP STONEFLIES 91 ));itti.'iii of dorsum of head and pronotum as in rig. 79. Subgenital plate, fig. 79, well developed but only slightly extending over ninth sternite, posterior margin essential!) straight witii corners angulate. Allotype, female.—Cultus lake, B. C, Sweltzer creek: Apr. 28, 1935, W. E. Ricker. (J HEAD AND PRONOTUM. Fig. T). — Uy,iroperl,i parallela. Other records for this species which ha\ c accumulated since it was originalh de scribed are as follows: British — Cultus lake: Apr. 18, l')36, W. K. Ricker, 19; Apr. 21, 1936, \V. K. Ricker, IcT. Oregon.—Clatskanie, Beaver creek: May 9, 1936, J. .Schuli, IcT. Hillsboro: March 19, 1936, Gray & Schuh, Icf. Chloroperla orpha—new species MALE.— [dominant color a pale greenisli white in life and pale yellowish white when preserved. Dark or black areas are as fol- low s: ocelli and compound eyes, fig. 80, hiteral margins of pronotum, and a narrow longitudinal stripe extending across ab- dominal tergites as in fig. 80. Cerci and antennae at base concolorous with bod>, segments of antennae beginning a short distance from base progressively becoming darker to black. \Vings with membrane and veins pale. Head wider through compound e}es than width of pronotum; three ocelli form- ing a nearly equilateral triangle, lateral ocelli placed about on a line with posterior margin of compound eyes, about twice as far apart as each lateral ocellus is distant from compound eye. Antennae many seg- mented, basal segments not much longer than broad, middle and apical segments about of equal length and much longer than broad. Pronotum slightly broader than long angles rounded, pronotal flange not well developed, embossings not evident. Legs slender ; first and second tarsal seg- ments very short, third tarsal segment over twice as long as length of iirst and second togetiier. Wings extending well beyond tip of ab
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