1922.] F. C. Fraser : Indian Dragonflies. 423 



but not meeting the mesothoracic collar ; a vestigial antehumeral 

 stripe represented by a subquadrate spot above and a mere trace 

 of a line some distance below it, barely visible to the naked eye ; a 

 broad humeral stripe and a very narrow mid-lateral, both discon- 

 nected from two larger spots below themselves ; finally, the posterior 

 two-thirds of the metepimeron. Beneath black, marked by a fine, 

 V-shaped, yellow spot. 



Legs slim, black and very long, the hind femora extending to 

 the apical end of the 2nd segment and furnished with four pairs 

 of very long equidistant black spines The anterior femora are 

 greenish yellow on the flexor surface. 



Wings hyaline, long and narrow ; stigma pale brownish yellow, 

 that of the hind much larger than that of forewing, 3*5 mm. to 5 



15-12 



mm. in the hind ; nodal index 



membrane absent. 



10-12 

 base, segments 3 to 6 slim and 



12-11 



Abdomen a little tumid at the 

 cylindrical, the apical part of 7 and segment 8 dilated and with 

 rudimentary lateral leaves, 8 and 9 almost the same length, 10 half 

 the length of 9. Black, marked with yellow as follows : segment 1 

 with a large quadrate spot on the side and a broad stripe on the 

 dorsum ; segment 2 with an L-shaped spot on the side, the under- 

 side of the very robust oreillets and a small 'stripe on the upper 

 surface of the same structure and a triiobed dorsal band ; 3 with 

 a lateral basal triangular spot followed by a small oval stripe 

 about the middle of the segment and its dorsum, widely at the 

 basal third but less so afterwards and not extending to the apex 

 of segment ; 4 to 6 with the same markings but the lateral stripe 

 absent and a wide gap between the basal, dorsal yellow and that 

 following it (this dorsal yellow is peppered with minute, black 

 spines); segment 7 with nearly its basal half yellow broadly and 

 its middle third narrowly; 8 to 10 with merely the dorsal carina 

 moderately, finely yellow. 



Anal superior appendages pale yellow, lyrate, broad at base, 

 tapering to a fine point, a little upturned, at first divergent but 

 then curling in so as to meet at the tips and enclose a circular open- 

 ing. The outer side with a broad blunt spine. Inferior append- 

 age with widely divergent branches, projecting from below the 

 superior so as to be seen from above, black. (It will be seen from 

 this description that the appendages are very similar to those of 

 Heliogomphus to which the genus is closely allied.) 



Female very similar to the male, differing as follows: bases 

 cf mandibles yellow (occiput similar to the male, simple but with 

 only fine, sparse, short hairs) ; abdomen with 9th segment about 

 the same length as 8, which is a little dilated, and tapering rapidly 

 to 10, which is very small and narrow (the tapering end of abdomen 

 suggestive of that of Macrogomphus). 



Anal appendages small, conical, palest yellow, as is also a 

 small, cone-like protuberance between them. 



Hind femora with 5 to 6 pairs of long black spines similar to 



