Neoperla furcostyla Li, Weihai & Qin 2013

Male. Forewing length 16.6–16.9 mm. General body color brownish. Distance between ocelli about as wide as diameter of ocellus. Head slightly wider than pronotum, lateral margins and M-line pale, a large medial portion brown with area between ocelli and a triangular patch on frons darker (Fig. 1A); compound eyes dark; antennae brown. Pronotum pale brown with medial portion brown (Fig. 1A); wing membrane subhyaline, veins brown; legs evenly brown. Abdomen brown, hemiterga darker.

China (Guangxi). Diagnosis.The male of Neoperla furcostyla is characterized by an elongate, almost straight aedeagal tube bearing a subapical fork with common stem. The aedeagal sac is triangular in shape and barely one fifth as long as tube; several dorsoapical spines and patch of smaller ventroapical spines are present at apex (Figs 1C, 2B). The type of the aedeagus of the new species is also found in Neoperla forcipata Yang & Yang, 1992 known from Mt. Wulingshan of Hunan Province of China, but the aedeagus of this species is different. In Neoperla forcipata (Fig. 2C), the aedeagal tube is more robust and has an obtuse curve near the subapical fork, and the fork is much larger than that of Neoperla furcostyla. The sac of Neoperla forcipata though not everted, has an evident lateral flap subapically that is absent on the sac found in Neoperla furcostyla. The new species is assigned to the Diehli subgroup of the Montivaga species group (Zwick 1983).