1922.] F. F. Laidlaw : Indian Dragon/lies . 401 



where, however, it is produced at the sides for about one-half the 

 length of the segment, and followed by a yellow apical mark. 

 The ninth segment has a large apical dorsal brownish- yellow mark. 

 Segment 10 and the anal appendages are entirely black. The up- 

 per pair are about as long as the tenth segment, slightly divaricate, 

 acuminate at their apices, the outer margin elbowed at its middle, 

 with a minute ventral tooth at the level of the elbow. The lower 

 appendage has two branches, slightly longer than the upper pair of 

 appendages, more widely divaricated, and sharply upturned apically. 

 The genital structures of the second abdominal segment are black 

 in colour. The first hamules are smalt and inconspicuous, the 

 apices pointed and hooked backwards. The second pair are large, 

 rather oval, and each carries a prominent forwardly directed hook 

 near its apex. 



Female. Colouring very similar to that of the male. It differs 

 chiefly in having the basal yellow ring of the third segment of the ab- 

 domen broader, and in the presence of a lateral distal yellow mark 

 on the same segment, whilst the lateral distal mark on the 

 eighth segment is reduced and the dorsal yellow mark on the 

 ninth is much smaller than in the male. 



Length of abdomen of cf29-f-0'75 mm., of hinder-wing 23-5 

 mm. ; length of abdomen of 9 33 mm., of hinder-wing 27 mm. 



Burmagomphus sivalikensis, sp. nov. 

 1 6 . Dehra Dun, 4-it-ig. F. C. Fraser. 



Head. Lower lip pale yellow. Upper lip yellow with black 

 margins, and a median black line dividing the yellow into two large 

 lateral spots. Bases of mandibles yellow. Anteclypeus brownish- 

 black, post-clypeus the same, with a median and pair of lateral 

 yellow spots. Frons yellow, with a black line extending from eye 

 to eye across its vertical part. Vertex black, occiput yellow, 

 margined with black, its posterior margin gently convex, carrying 

 a fringe of long brownish-black hairs. 



Prothorax black, its anterior margin, a pair of lateral spots 

 on the hinder margin and a minute median spot on the same 

 margin yellow. 



Synthorax. Dorsum black marked with yellow as follows : — a 

 broajd mesothoracic collar, finely divided by a median black line ; a 

 pair of dorsal lines separated below from the mesothoracic collar and 

 above from the ante-alar sinuses, and outside these on either side, 

 a longer irregular juxta-humeral band, constricted a little below its 

 apex, running down and continuing on to the mesinfraepisternite. 

 This band is margined externally by a black line which runs on 

 cither side of the humeral suture. The sides of the synthorax are 

 yellow ; a narrow black band, of about the same width as that lying 

 along the humeral suture, runs along the position of each of the 

 lateral sutures on either side. 



Legs black, the inner surface of the first pair of femurs yellow- 

 ish-white. 



