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Show 1902.J DRAGONFLIES OF THE 11 SKEAT EXPEDITION." the pterostigma more oblique than the outer. Pterostigma black, with pale margin, enclosed by a very thick black nerve. Median and subnodal sectors united by a common stalk from their origin as far as the first transverse nerve they encounter (on the right fore wing beyond it for a short distance). Posterior tibias with four pairs of black spines. Upper surface of the head dark green, upper lip dull bronze, nasus black, antennae brown, postocular surface dirty white. Prothorax dull brown, dorsal surface of thorax bronze-green, sides and under surface greyish white, pruinose. Abdomen (segments 1-7 only) bronze-black above, dull dark brown below. Allied to T. superba from the Celebes and Moluccas. It differs in details of coloration and in having only four spines on the posterior tibias. * T e in o b a s is r u f ic o l l is (Selys). * A r c h ib a s i s m e l a n o c y a n a (Selys). A r g io c n e m is r u b e o l a Selys. Argiocnemis rubeola Kirby, Cat. Odonata, p. 15b. Race sumatrana ? Kruger, Stett. ent. Zeit. 1898, p. 1^6. 1 <3 from Khota Baru, Kelantan. A r g io c n e m is n ig r ic a n s Selys ? Argiocnemis nigricans Kirby, Cat. Odonata, p. 158, Kiiigei, Stett. ent. Zeit. 1898, p. 126. 4 <$ , 1 $ from Khota Baru, Kelantan. ^ Like Kruger's specimen, mine are rather larger than Selys's. Length of hind wing, 6 15, $ 16 mm. abdomen, <$ 27, $ 26 ,, Postnodal nerves from 9 to 18 on the fore wing. The middle lobe of the prothorax rather truncate, not rounded. The males differ from Selys's description m having segments 8-9 of the abdomen of a dull-brown colour (probably blue m the living insect), whereas in the male described by Selys there is a trilobed blue mark on the eighth segment Otherwise the agree-ment is fairly close. It should be remarked however, that the colour-pattern of my four male specimens shows no variation The female is exactly like that described by Selys as the fen|al® of A niaricans I am disposed to think that the female described b y SelT f a s belonging to nigricans did not belong to the same species as the male. His measurements suggest this. They ^Length of abdomen, c? 22, 5 25-28 mm. hind wing, 6 15, ? ^ -lO >> . , If I a m right, then, in taking this view, it follows that the female of the true A. nigricans is aa yet unknown, whilst my specimens belong to a distinct species, differing from A nigricans, |