Two new species in the subfamily Perlinae (Plecoptera, Perlidae) from China

Abstract Two species in the genera Neoperla and Kamimuria (Plecoptera: Perlidae) from China are described as new: Kamimuria guangxia sp. n., and Neoperla mesostyla sp. n. The new species are compared to similar taxa.

Female. Unknown. Etymology. The specific epithet refers to Guangxi autonomous region where the type specimen was collected.
Diagnosis. The male of K. guangxia is characterized by the hemiterga being slightly swollen apically. The aedeagal sac is membranous, medially constricted, apex expanded, heart-shaped and mostly covered with fine to tiny spines (Figs 1C, 2B). The new species is similar to K. atra , a species known both from Vietnam and Thailand, in general body color and features of terminalia, but tergum 8 of the new species has no sensilla basiconica patch. Male. Forewing length ca. 14.8 mm. General body color brown. Distance between ocelli nearly as wide as diameter of ocellus. Head slightly wider than pronotum, with a small triangular interocellar patch and another black triangular patch on frons (Fig.  4A); compound eyes dark; antennae dark brown. Pronotum pale brown with darker anterior and median stripes (Fig. 4A); wing membrane pale brown, veins dark; legs yellowish brown, distal fourth of femora, basal fifth of tibiae and tarsi darker (Fig. 4C).
Zwick & Sivec defined the bulb side of the tube as being ventral, however, the sac of the new species forms a loop so that the spines of apical half of the dorsal surface are actually ventrally directed; we herein discuss dorsal or ventral surfaces of the sac as if it were straight, as such in Neoperla flagellata Li & Murányi (Li et al. 2012) and N. monacha Stark & Sivec (Stark and Sivec 2008).
Female. Unknown. Etymology. The specific epithet refers to the mesal position of the bifurcate lobe on the ventral surface of the aedeagal tube.

Diagnosis.
The new species appears to belong to a well differentiated subgroup of the montivaga species group (Zwick 1983) that has as tube characteristics a dark, elongate sclerite dorsally and a bilobed, mostly membranous process ventrally (Zwick and Sivec 1985). Based on these features, several other species could also be assigned to this diehli subgroup: Neoperla han Stark, N. mnong Stark, N. furcostyla Li & Qin, N. forcipata Yang and Yang & N. yao Stark. The new species is characterized by the aedeagal tube being short (≤3× width of bulb) and the ventral, bifurcate process being midlength on the tube. Additionally, the apical half of the sac is clothed with heavy spinules on the dorsal surface. Neoperla diehli has an elongate slender aedeagal tube (length ≥4× tube width), the ventral processes originate at the apex of the tube, and the heavy spinules are restricted to the tip of the sac (see Fig. 21 in Zwick and Sivec 1985). Neoperla mesostyla is easily distinguishable from other members of the group by its very long sac and relatively short Y-lobe. Neoperla han Stark