BORNEAN DRAGONFLIES. 63 
the first on the mesepimeron, the second, the broader, on the 
metepimeron ; the under surfaces are brown, and there is a yellow 
spot on the interalar sinus. 
The legs are black, the coxee and base of under surface of the 
first pair are lemon-yellow. 
Abdomen: Segments 1, 2, 3 and 5, 6, 7 a little dilated. 
Black with golden-yellow markings as follows :—A fine transverse 
band at the distal end of the dorsum of 1. The terminal half 
of 2, but this band carries a black median dorsal spot, which has 
vather the shape of a three-pointed ivy-leaf directed backwards, 
the yellow band is also incomplete below. 3, 4, 5 with a pair of 
lateral spots at their middle, and a terminal half-circle, inter- 
rupted by the mid-dorsal carina. 6, 7, 8, 9 with the terminal 
half-circle only. 
Measurements of specimen from Bhowali :— 
Length. of abdomen 57 mm.; hind wing 42°5 mm. 
Length of pterostigma 3mm. ; width of head 9 mm. 
Breadth of wing 15 mm. | 
Norr.—I have omitted from the list Macrogomphus abnormis 
de Selys as its provenance is doubtful. 
EXPLANATION OF THE PLATE. 
Fig. 1. Ictinus acutus, sp.n. Superior anal appendages of male, seen from above. 
2. Burmagomphus vermiculatus (Martin), insularis subsp. n. ‘Thoracic colour 
pattern (diagrammatic). 
3. Heterogomphus icterops Martin, borneensis subsp. n.? 
4. Orogomphus dyak Laidlaw. 6, wings of lett side. 
5. 5 a A 2 , wings of left side. 
6. # 5 3 6, anal appendages. 
ds ae ms 43 6, penis and vesicle. 
8. Orogomphus splendidus de Selys. 2, wings of left side. 
(For the photographs from which figs. 3, 4, 5, and 8 are reproduced I am 
indebted to the kindness of Messrs. F. W. & H. Campion.) 
