Isoperla ordosi Wu, 1938

Isoperla ordosi Wu, 1938a . Bull. Pek. Soc. Nat. Hist., 13(1): 57; Wu, 1938b. Plecopterorum Sinensium, a monograph of the stoneflies of China (Order Plecoptera): 195; Claassen, 1940. Mem. Cornell agric. Exp. Sta., 232: 204; Illies, 1966. Das Tierreich, 82: 414.

Type information. Holotype male, China: Inner Mongolia, Alashan Eerduosi. 1919.VII.17.

Remarks. Only male of this species is known and is apparently characterized by a posteromedially projecting terga 8–10, paired triangular patches of spines on tergum 9, long triangular and hooked paraprocts, and a well-de- veloped, recessed, moderately pedunculate vesicle (Figs. 1 K–L; see figs. 286, 287 in Wu 1938a). Color pattern: head pale brown, ocelli with dark margins; pronotum pale brown, with very shallow rugose; legs yellowish brown; ventral surface of body pale brown (Wu 1938a).