On a collection of dragonflies made by members of the 'Skeat expedition' in the Malay peninsula in 1899-1900. Pt. II / by F.F. Laidlaw.

  • Laidlaw, Frank Fortescue, 1876-1963.
Date:
1902
Catalogue details

Licence: In copyright

Credit: On a collection of dragonflies made by members of the 'Skeat expedition' in the Malay peninsula in 1899-1900. Pt. II / by F.F. Laidlaw. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    Protliorax dull yellow, a pair of black spots on either side of tlie mid-dorsal line on the median and posterior lobes. Thorax bronze-black above, sides dull brownish yellow, with an indistinct black line along the second lateral suture. Abdomen black, segments 3-7 with a pale yellow basal ring. Hinder dorsal half of segment 9 yellow. Segments 2-6 with ■an indistinct wide yellowish-brown ring lying behind the middle of each segment, save in segment 2 where it occupies the greater I part of the segment. Appendages black. Legis yellow with long yellow spines, 6-7 pairs of these on the third pair of tibias, directed almost laterally. Length of hind wing 17’5 mm., of abdomen 30 mm. This species is the smallest member of its genus. It is of interest geographically, as the other species are recorded from the Celebes and Philippines. It is also of interest because, having its median and subnodal sectors arranged as in those species, it tends to prove that the genus is a natural one and not derived polypi]yletically from Platysticta. ^Platysticta quadrata Selys. Singapore. ^Disparoneura analis Selys. Sumatra, Malacca, *D. INTERRUPTA SclyS. Sumatra, Banca. Singapore. D. HUMERALis Selys. Disparoneium hiimercdis Kirby Cat. Odonata, p. 134. 2 , 1 $ from Kwala Aring. In one of the males there is no trace of the lower sector of the quadrilateral on the hinder wings. 5 . Pterostigmata nearly black, paler round the edges. Upper lip and gense yellowish brown; a stripe of the same colour i uns across the vertex. The prothoiax has a pair of lateral yellow marks continuous with antehumeral lines of the same colour on the thorax. Abdomen with the mid-dorsal crest of segments 2-3 yellow. 3 6 with a pair of small lateral yellowish-white spots at their bases. All these markings are on a black ground. Disparoneura collaris Selys. A single male from Kwala Aring. Caconeura gracillima (Selys) ? A single male from Kwala Aring, very immature, shrivelled, and without segments 7-10 of the abdomen.