384 MR. p. P. LAIDLAAV ON THE [DeC. 2, 



Prothorax dull yellow, a pair of black spots on either side of 

 the 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 

 part of the segment. 



Appendages black. 



Legs yellow with long yellow spines, 6-7 pairs of these on tlie 

 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 

 polyphyletically from Plcitysticta. 



*Platysticta quadeata Selys. 

 Singapore. 



*Disparo]S[eura analis Selys, 

 Sumatra. Malacca. 



*D. iNTERKUPTA Selys. 

 Sumatra. Banca. Singapore. 



D. HUMERALis Selys. 



Disparoneura humeralis Kirby, Cat. Odonata, p. 134. 



2 c? , 1 ? from Kwala Aring. 



In one of the males there is no trace of the lower sector of the 

 quadrilateral on the hinder wings. 



2 . Pterostigmata nearly black, paler round the edges. Upper 

 lip and gense yellowish brown ; a stripe of the same colour runs 

 across the vertex. The prothorax 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. 



Oaconeura GRACiLLiMA (Selys) ? 



A single male from Kwala Aring, very immature, shrivelled, 

 and without segments 7-10 of the abdomen. 



