BORNEAN DRAGONFLIES. Da 
Anal appendages relatively shorter, the limbs of the lower one 
stouter and less divaricate (doc. cit. fig. 28,4,B. Cf. also Martin, 
quoted by Williamson, loc. cit. p. 301). 
[Ris loc. cit. has recently described a species from Java which 
he refers to this genus under the name B. jacobsoni. This species 
differs from B. vermiculatus in the colouring of the thorax, in the 
shape of the genital hamuli, and of the anal appendages. It is 
also a little larger. 
He is inclined to regard the form described by Williamson as 
distinct from the true B. vermiculatus of Martin. | 
The specimen described above is deposited in the British 
Museum. 
HErEROGOMPHUS ICTEROPS Martin, subsp. BORNEENSIS, nov. ? 
(EG JES wiles, a5) 
Heterogomphus rcterops Martin, Mission Pavie, p. 9 (sep.); id., 
Bull. Mus. d’Hist. Nat. 1902, no. 7, p. 506; Williamson, loc. cit. 
p. 316. 
1g. Matang Rd. 28:3:10. 
Length of abdomen (without appendages) 51 mm. 
Length of hind wing 45 mm. 
The cross-nerves on the wings on the right side of the single 
specimen are highly irregular; it would seem as though that 
during development those wings had suffered from a ‘ cell- 
storm” which did not interfere with the general symmetry of the 
wings nor yet largely with their main structural features, but 
considerably disturbed the number and arrangement of the cross- 
nerves, especially on and near the costal spaces. 
Martin’s description of the species, based on an example in 
de Selys’ collection, from Java, is very brief. Hence, without 
actually confronting the specimens, it is impossible to say how 
far the Bornean form here described is distinct. 
Venation :— 
13—15! 12—15 
In addition, there are several incomplete antenodals on the 
right fore wing, and two cross-nerves in the submedian space, 
whilst there is also a single crogs-nerve in the supra-triangle of 
the hind wing of that side. 
The pterostigma has a well-developed brace on all four wings. 
Head: With the exception of the vertex and occiput which are 
very dark brown, and of the eyes which in the dead specimen are 
brown, the head is light brownish yellow in colour; the pro- 
thorax is brown, lighter at the sides. 
The thorax is yellow marked with brown as follows :—A broad 
humeral band continuous above with the brown of the antealar 
sinuses and below witha narrow stripe running along the anterior 
margin of the mesothorax ; a broad band runs down along the mid- 
dorsal carina, narrowing below and just meeting the posterior 
