232 ON BORNEAN DRAGONFLIES. 



ANISOPTERA. 



^SCHNIDiE. 

 GOMPHIN^. 



Heterogomphus sumatranus Kriiger, 



Heterogomplius sumatranus Kriiger, Stett. Entom. Zeit. 1898, 

 p. 294. 



b S <S . Retuh, 15-16. v. 14. 



Mr. J. C. Moultoii tells me that this species has blue eyes. 

 It is otherwise remarkable for the rich chestnut -brown colouring 

 of the thorax and abdomen. The latter has the apices of seg- 

 ments 2-9 ringed with black. 



The species is quite distinct from H. icterops Martin. 



[Note. — Owing to the great difficulty of setting the wings of 

 these very fragile insects, some distortion of the wing-base has 

 occurred in the specimens photographed. This is especially the 

 case with the types of G. macrostigma and G. nigrohamata, con- 

 sequently the figures of the wings of these species (text-figs. 5 

 and 7) do not exhibit clearly the course of the " anal bridge " 

 vein, which is, however, that normally found in the genus, ] 



