大巴山多棘蜒属一新种记述（蜻蜒目：蜒科）

DESCRIPTION OF A NEW SPECIES OF POLYCANTHAGYNA FROM MT. DABASHAN,CHINA(ODONATA:AESHNIDAE)

本文报道采自四川通江县的一新种蜒，赵氏多棘蜒Ｐｏｌｙｃａｎｔｈａｇｙｎａｃｈａｏｉｓｐ．ｎｏｖ．，同时与近似种Ｐ．ｅｒｙｔｈｒｏｍｅｌａｓ进行了比较。

Polycanthagyna chaoi sp. nov. (figs. 1-8) The new species is allied to P. erythromelas, but the background colour of the Pterothorax is black with yellow-green Patterns, whereas the latter's background is dark red-brown, Especially, there edests a conspicuous subapical dorsal tubercles on the superior annal appendages of the new species, wbe the latter has not. Holotpe , Paratgu were taken from Mt. Dabashan in Sichuan Proved. All the type specimens are depositedd in the Department of Biology, Hanzhong Teachers' College.