SOME NOTES ON ORIENTAL DRAGONFLIES. 925 
the ventral margin of the tergite, close to the anterior end of the 
segment. This thickening of the margin is about a millimetre in 
length and is beset with a few very stiff short hairs. It is quite 
a definite structural feature and possibly serves some purpose in 
connection with the genital structures of the segment. ; 
Cincta and its allies seem to form a distinct group of rather 
large species, characterized not only by peculiarities of coloration 
but also by the relative large size of the pterostigma, and by cer- 
tain secondary sexual characters. The group appears to be con- 
fined to Malaya and Indo-China. 
Macromia corycia n. sp. (Fig. 5.) 
14. Ulu Baram, Sarawak, Borneo 3. xi. 20., coll. J.C. Moulton. 
The specimen is the Type. | 
Wings colourless. Pterostigma 2 mm. black. Costal nerve 
black.. Nodalindicator ,§ 13; 12 
Upper lip black, shining, almost metallic, ante- and post- 
elypeus very dark brown, the latter with the two small pits im- 
mediately below the frons, coloured a little paler. Frons entirely 
metallic violet. Synthorax brilliant metallic green, the yellow 
markings rather of a buff-colour. Abdomen slender, segments 2 
and 7-9 moderately inflated. Small transverse marks on the dor- 
sum of the second segment, at about its middle, of pale yellow. 
Sides of the segment brown passing indefinitely into green above. 
Basal mark on 7 orange-yellow, occupying rather less than the 
basal quarter of the segment. Segments 7-10 black. 
Anal appendages blackish-brown, upper pair 2 mm. long: 
lower appendage a shade longer. The upper pair are very similar 
in shape to those figured by Ris (loc. cit. Fig. 42.) for his species 
M. urama. 
Type specimen in British Museum ex coll. Raffles Museum, 
Singapore. : 
This beautiful little species is readily distinguished from its 
allies by the dark colouring of the post-clypeus, and by the absence 
of any markings on the abdomen save on the second and seventh 
segments. Its nearest relations would seem to be M. urania Ris 
and M. callisto n. sp. 
Macromia callisto n. sp. (Fig. 6.) 
Macromia gerstaeckeri Laidlaw (nec Kruger) Proc. Zool. Soc. 
London 1902 pp. 76-77. | 
1¢é 19? Kuala Aring, Kelantan, Malay States, coll. F. F. Laidlaw 
(Skeat. Exp.) Types 6 and @ in Mus. Comp. Anat. Cambridge. 
Though bearing a close resemblance to WV. gerstaeckeri Kruger 
this species differs in that, whilst Kruger’s species has a prominence 
on the dorsum of the tenth segment of the male, callisto is entirely 
without this structure. 
R. A. Soc,, No. 85, 1922. 
