224 SOME NOTES ON ORIENTAL DRAGONFLIES. 
tion. It shows some differences in detail which may be charac- 
teristic of a local race of the species, or may be due to age and 
loss of markings in preservation. 
The specimen before me js fully adult. 
Wings almost colourless save for a very small dark brown 
mark at their bases, extending from the costa to the median veln, 
and in the hind-wing rea ching distally nearly as far as the tat 
ante-nodal cross vein, in the fate -wing it is only half as extensive. 
Pterostigma 3 mm. long, black. Goetal nerve black. Membranule 
ereyish-w hite, anal angle very acute, a slight yellow tinge about 
the angle. 
Nodal indicator 4547 | 1845. Length of wing 46 mm. 
Front of head uniformly blackish-brown with a shght lustre 
which is more marked on the upper part of the frons. 
Svnthorax dark-brown with green and violet reflex. No hu- 
meral stripe. Lateral stripe, covering the stigma pale, buff-yellow. 
The brown ground colour deepens to black immediately on either 
side of this stripe, and is here more richly metallic. There is also 
a small lateral ventral mark of buff-yellow on the metepimeron 
not quite terminal. 
Abdomen dorsally black, or brownish-black; dark brown ven- 
trally and on the sides of the first and second segment. The 
second segment has transverse band of a creamy yellow colour 
running across the dorsum from one auricle to the other not touch- 
ing the base or apex of the segment. 
The third segment has a dorsal spot of the same colour im- 
mediately in front of the transverse carina, divided into two by 
the longitudinal median carina. Below it is creamy-white. 
Segments 4-5 have small paired lunules similarly placed but 
of a darker yellow, whilst 6 is entirely black. 
The seventh segment has a small basal yellow mark on the 
dorsum occupying only about one-eighth of the length of the seg- 
ment. The remaining segments entirely black. 
Anal appendages very dark brown, exactly corresponding to 
de Selys’ description. 
The genital lobe of the second segment is small. The hamules 
are slender, boidly recurved apically so as to be hook-like. 
The tenth segment of the abdomen has a sharply: pointed 
dorsal prominence. 
I believe that J/. borneensis Kruger and M. pyramidalis 
Martin, are probably members of this group. J have not seen 
examples of either. 
Asa special feature (possibly found in all the males of this 
group, as I have seen it in cincta and in no other Oriental groups) 
I would call attention to a curious thickening of a small part of 
vour. Straits Branch 
