Oligoaeschna, Selys, 1889

M. A. Lieftinck, 1940, Descriptions and records of South-East Asiatic Odonata (II), Treubia 17 (4), pp. 337-392 : 377-378

Genus Oligoaeschna Selys's (___ Jagoria Karsch),

Of this genus the following species were known to science: — O.amata (Forster) . Insekten-Börse, 20, 1903, p. 1 - 2 sep. — Terra typica:

Brunei,N.Borneo,♂. O bühri (Forster) . Insekten-Borse, 20, 1903, p. 2 sep. — Terra typica: Brunei, N.Borneo,♂. O. martini (LAIDLAW). Rec. Lid. Mus. 22, 1921, P; 76 - 77.. - Terra typica: Darjiling, Himalaya, ♀., O. modiglianii Selys. Ann. Mus. civ. Genova 2 (7) 1889, p. 471 - 472, fig. (wings ♂). —— Terra typica: Nias Id., ♂ (generotype). O. poeciloptera (KARSCH). Entom. Nachrichten, 15, l 889, p. 238 - 239.—Terra typica: Luzon P. I., ♀. O. pryeri (Martin) , Cat. Coll. Selys, 19, Aeschnines, 1909, p. 134 - 135, fig, 132 (apps, ♂), pl. 2 fig. 8 (insect ♂). — Terra typica: Japan ♂. O. venatrix (FORSTER). Insekten-Borse, 20, 1903, p. 2 - 3 sep.

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—— Terra typica: Besten Id., S. Celebes, ♂. O. zambo Needham & GYGER. Philipp. J. Sei. 63, 1937, p. 40 - 41, pl. 2 fig. 33 - 34 (apps. ♂`, pl. 3 fig. 48 (wings ♂). — Terra typica: S. Mindanao, P.I., ♂.)

Apart from the N. Indian O. martini (Laidlaw) , and the Japanese O. pryeri (MARTIN), only one species of Oligoaeschna , viz. nıodiglianii SELYS, appears to to be well known and to have a fairly wide distribution in the Malay Archipelago. It has been reported from the island of Nias, the Mentawei Islands (Siberoet and Sipora), and Borneo; its occurrence in the Malay Peninsula and Sumatra is still a little doubtful.

The remaining species are obviously very closely related inter se.

O. modiglianii .- I have examined a couple of this species from Borneo in the Mac Lachlan collection (now in the British Museum); 1 male from Brunei (N. Borneo, ex STAUDINGER 1903) and several unidentified females, in the Leiden Museum; 5 males and 8 females, all from Borneo, in the Paris Museum; 3 males and 2 females, from Brunei or without indication of habitat, in the Brussels Museum; lastly, 3 males and 2 females, all from W. Borneo, in the Buitenzorg Museum.

378 Tasman Dese l?, 1940, Art. 4.

O. poeciloptera and zambo . - Of O. poeciloptera (KARSCH), from Luzon. unfortunately only the female is known with certainty. This may be the same species as O. zambo , subsequently described by NEEDHAM & GYGER after 2 males from Mindanao. Possibly because of the male of poeciloptera being still unknown to science, zambo was compared with bühri (FORSTER) instead of with poeciloptera . O. zambo appears to be most closely allied to mutata , sp. n., but is a much larger species.

O. bühri .- Mrs. HOWARD K. GLOYD informs me that the type of this species is a single male in the Michigan Museum, Ann Arbor, labelled: Brunei, N. Borneo, Dr. O. STAUDINGER vend.

I have examined two males in the Paris Museum identified with bühri by MARTIN, one from Brunnei ”, the other from “ Borneo ” The colours are faded but otherwise these examples agree in every respect with Forster's notes and with Menger's drawing of the anal appendages of the type (MARTIN, loc. cit,fig.128).

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Only known from Borneo.

O. venatrix . — This species I have not seen. The male is easily distinguished from all other species of the genus by the curious fractured appearance of its superior appendages. It is only known from the island of Boeton, South Celebes

. Here follow the descriptions of two new species of Oligoaeschna from Borneo, and additional notes on O. amata (Forster) .