Podolestes buwaldai, M.A. Lieftinck, 1940

M. A. Lieftinck, 1940, Descriptions and records of South-East Asiatic Odonata (II), Treubia 17 (4), pp. 337-392 : 347-348

Podolestes buwaldai , sp. n. ( fig. 4 b ).

Material studied: — 1 ♂ (ad.), E. Sumatra, Riouw lies., Rengat , Pang- kalankasai , April 2, 1939, P. Buwalda leg. Holotype in the Buitenzorg Museum .

Male (ad.). — Head almost entirely black. Hinge and base of median lobe of labium brown, darker towards apex, lateral lobes black; labrum shining. Genae and frons, between the insertion-point of antennae and margin of compound eyes, smooth and with slight metallic-blue reflections. Occipital ridge slightly bluish pruinose. Antennae black.

Prothorax black, thinly pruinose blue; suture between median lobe and epimeron marked off by an irregular yellow line. A yellow basal point on either side of the anterior lobe and a transverse streak of the same colour on each side along base of posterior lobe.

1) This record was erroneously given for praemorsus in my latest account of this species (loc. cit. p. 63).

348 Treubia Deel 17, 1940, Afl. 4.

Thorax black above as far down as the first lateral: suture, mesepisterna and mesepimera with metallic-green lustre. Metapleurae dull ochreous, with two sharply defined, oblique, metallic-green bands, shaped as in fig. 3 b . Venter auburn, paler among the sutures.

Coxae and trochanters auburn, paler behind. Outer surface of all femora Sand ford’s brown, apices darkened, chestnut-coloured; inner surfaces bright orange-chrome. Tibiae salmon-orange exteriorly, inner surfaces orange-chrome. Tarsi orange-rufous, apical joint darkened towards tip; claws brown. Spines orange-rufous.

Wings identical in shape, and neuration also similar, to those of typical chrysopus. Pterostigma black. Nodal index14.15/14.14.

Abdomen coloured similarly to chrysopus , and anal appendages exactly identical in shape with those of that species. (See my description and drawings of P. chrysopus Selys, from W. Borneo, in Treubia, 15, 1935, p. 181 - 183, fig. 3).

Length: abd. + app. 30, hw. 22.7 mm. Female unknown.

This new species is closely allied to P. chrysopus , Selys, both in the general wing-structure and the colour-pattern of the abdomen, as in regard to the structure of the anal appendages of the male. It differs very strikingly in the colour of the legs and in details of the thoracic colour-pattern, which, in chrysopus , are very constant characters ( fig. 4 a).

I have much pleasure in naming this species after Dr. P. Buwalda, who as a botanist took great interest in collecting insects as well.

Figures

Fig. 4. Colour-pattern of synthorax of Podolestes chrysopus S e ly s ♂ (W. Borneo, a); P. buwaldai, sp. n. ♂ (E. Sumatra, b); P. coomansi, sp. n. ♂ (E. Sumatra, c); P. orientatis S e ly s ♀ (E. Borneo, d).

Fig. 3. Lestes praevius, sp. n. Male anal ap­ pendages, dorsal view (left side), and right side-view.