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A new species of damselfly, Pericnemis melansoni sp. nov. from Mindanao, is described and illustrated. It differs from its closest described relatives in lacking an elongate process on the posterior lobe of the prothorax, and in having the lower branches of the cerci longer than the upper branches.

59. Pericnemis stictica Selys. - Eastcoast Gvt.: Deli. Soekaranda. 1 ♀ (Kruger). Benkoelen Res.,: Redjang. Soebanajam. 1 ♀ (Ris). S. Lampoeng Res.: Mt. Tanggamoes. Gisting. 500 m. 1 ♀ Sept. 26. 1933. Toxopeus leg. - Abd. 49. hw. 37 mm. One of the smallest specimens which I have seen. I possess some ♀ ♀ from Mt. Slamat and Mt. Raoeng. in Java. which are of the same size or even smaller; in this respect the species is a very variable insect. Differs from Javan females only in that the pterostigma is brown surrounded by a broad yellow border. instead of being entirely yellow. In the structure of its prothorax the present ♀ is identical with Javan ones., Published as part of Lieftinck, M. A., 1935, A Synopsis of the Odonata (Dragonflies) of Sumatra, pp. 1-23 in Miscellanea Zoologica Sumatrana 1 on page 10, DOI: 10.5281/zenodo.3251875, {"references":["Kruger. L. Die Odonaten von Sumatra. I ~ III. Stett. ent. Zeitg. 59 - 63. 1898 - 1902.","Ris. F. Odonaten von Sumatra, gesammelt von Edward Jacobson. Zool. Meded. Leiden. 10. 1927."]}