1922.] F. F. Laidi.aw : Indian Dragonflies. 405 



0. capitatus Martin, from the Celebes shows the same combi- 

 nation in the colour-pattern of the synthorax. But according to its 

 describer the sides of segments 8 and 9 of the abdomen carry leaf- 

 like expansions, which at once distinguish the male from any of 

 the geometricus group. 



Onychogomphus saundersi Selys. 



1 S . Burma. E. B. Williamson. I $. Toungo, Burma. E. B. William- 

 son. 1 $ "Type." Brit. Mus. 



The specimens from Burma have not been identified hy 

 Mr. Williamson as this species but I think there can be no doubt 

 of their identity. 



I have not seen the specimen recorded by Williamson from 

 Burma as belonging here. His figure of the anal appendages 

 leave little room for doubt but that the specimen belongs to the 

 geometricus section, but the colouring of the sides of the synthorax 

 is not that of saundersi, which has distinct bands along the lateral 

 sutures, with the metepisternite yellow, not black. Hence I think 

 his specimen must belong to a species distinct from 0. saundersi 

 Selys. 



Length of hinder-wing of d> 30 mm., of 9 32*5 mm. 



Onychogomphus aureus, sp. nov. 

 3 & 6 . Tura, Garo Hills, Assam, 1200-1500 ft. S. Kemp. (7978/H1). 



Close allied to 0. geometricus Selys. 



Head. Upper lip black with a pair of large yellow spots. 

 Ante-clypeus and post-clypeus black, with a pair of lateral spots 

 on the latter. Frons black with a broad yellow band across the 

 horizontal part just behind its crest. Vertex and occiput black, 

 the former with a pair of tubercle-like projections immediately 

 behind the ocelli. 



Prothorax black with small paired median spot anteriorly and 

 larger lateral spots ; its hinder lobe yellow. 



Synthorax with dorsum black, yellow mesothoracic collar inter- 

 rupted in the middle by the black of the mid-dorsal carina. Dor- 

 sal stripes meeting it on either side. Antehumeral stripe inter- 

 rupted, represented by a superior spot and a vestigial line 

 separated from the spot, along the humeral suture. Laterally the 

 synthorax is golden-yellow, with a black line along the second 

 lateral suture. 



Legs black, but posterior femora largely brown deepening to 

 black apically. 



Abdomen with segments 1 and 2 yellow, with the yellow of 

 the dorsum enclosed between longitudinal black bands. On the 

 first segment this dorsal yellow widens apically. On the second it 

 is trilobed diminishing from before backwards. Oreillets yellow 

 margined finely with black. Segments 3-6 golden brown with 

 apical black rings, which are progressively larger, on the third seg- 

 ment occupying about the distal quarter of the segment, on the 



