Amphicnemis annae, M.A. Lieftinck, 1940

M. A. Lieftinck, 1940, Descriptions and records of South-East Asiatic Odonata (II), Treubia 17 (4), pp. 337-392 : 370-371

Amphicnemis annae , sp. n. ( pl. 15 fig. 4 , pl. 16 fig. 4 ).

1911. RIS, Ann. Soc. ent. Belg. 55, p. 236 237 (key) fig-. 5 (♂ apps.). — ♂ (nec ♀!), W. Borneo ( A. wallacei ).

1913. LAIDLAW, P. Z. S. London, p. 70; 74 (key ♂), pl. 4 fig. 7 (♂ proth.). — ♂ Sarawak ( A. wallacei ).

Material studied: — 1 ♂ (ad.), 2 ♀ (juv., red), W Borneo, Singkawang, forest-marsh near Tjapkala , Jan. 16, 1934, L. COOMANS DE RUITER leg. Holo- type ♂ and allotype ♀ in the Buitenzorg Museum .

This very distinct species has long been known as wallacei ; but since SELYS’S type of A. wallacei is indistinguishable from the species described by LAIDLAW as louisae, this name unfortunately should be dropped as a synonym of wallacei .

Only few specimens. of annae were known, and no descriptions of it are available in the literature. I believe its position to be closest to wallacei . The supposed allotype ♀ of wallacei , described by RIS, neither belongs to wallacei nor even to annae , and I am unable at the present to identify it from the description alone. The following notes may be added to those given in the key to the species of both sexes:— Male (ad.). —- Labium pale yellow. Mandibles yellow, each with a large, slightly diffuse, triangular, brownish spot upon middle. Labrum shining black, its anterior margin bright yellow and fringed with yellow hairs. Anteclypeus yellow, postclypeus shining black. Frons in front black with two yellow' spots, one on each side of the middle. Dorsal surface of head metallic-green. Antennae brown, basal joints striped with yellow anteriorly. Rear of the head black.

Prothorax metallic-green above, anterior lobe with a pair of round orangish spots, one on each side of the middle; propleuron also metallic-green, its lateral border yellow.

Synthorax metallic-green, as far down as the first lateral suture and the spiracle, including the dorsal two-thirds of the mesinfraepisternites and the dorsal fifth of the metepisternites. Sides and under surfaces pale yellow.

M. A. LıEıfTıNck: Descriptions and records 0 ƒ S. E. Asiatic Odonata . 371

Legs yellow, spines brown. Femora pale ochreous, with sharply defined black apical ring; a very diffuse brownish line runs along the distal half of their posterior surfaces (most marked on anterior pair of femora).

Wings hyaline; M 3 arises at the subnodus or slightly distal to it, Rs about midway between subnodus and Px 1. Pterostigma greyish-brown with fine yellow margin. Postnodals 12 - 13 in fore wing, 10 - 11 in hind wing.

Abdomen coloured as described for “ louisae ” (= wallacei ) by LAIDLAW. Tenth segment pale reddish-brown basally and along posterior margin. Anal appendages of the same colour, shaped as shown on pl. 16 fig. 4 .

Female (red colour-phase). — Head coloured much as in the opposite sex, but pale areas slightly enlarged. Labrum with the distal half yellow, frons with a complete yellow anterior fascia, and a yellow line along margin of compound eyes.

Pro- and synthorax, and legs throughout scarlet-red. Spine of posterior lobe of prothorax equal in length to that of the male. Ante-alar triangles metallic blue-green. Postnodals 12 - 13 in fore wing, 11 in hind wing. Abdomen with segm. 10 and appendages whitish; valves also pale-coloured, slightly surpassing end of abdomen.

Apparently a very scarce species.

Figures

Pl . 15 . — Structural characters of Malaysian species of Amphicnemis . 1 - 3 . Male anal appendages , dorsal view and right side . 4 . Right lateral view of prothorax .

Pl. 16. — Male anal appendages of Malaysian species of Amphicnemis, dorsal view and right side

Fig. 7. Coeliccia arcuata, sp. n. ♂. Anal ap ­ pendages, dorsal view and right side .