1922.] F. F. Laidlaw : Indian Dragon/lies. 397 



correctly referred to the present species. The structure of the 

 second pair of genital hamules is very similar to that found in G. 

 nilgiricus, but the hamule is more curved forward at its apex and 

 not so prominent as in that species. 



Gomphus nilgiricus, sp. nov. 

 i ?. Nilgiris, 3000-4000 ft. F. C. Fraser. 



Head. Lower lip yellow, upper lip brown, bases of mandi- 

 bles and anteclypeus of the same colour, post-clypeus black. 

 Vertical part of frons black, horizontal part lemon yellow. Ver- 

 tex and occiput black, the latter with its hinder margin a little 

 raised medially. 



Prothorax black, the middle lobe with a large lateral spot of 

 yellow on either side, and a small mid-dorsal, paired, yellow spot; 

 the hinder margin likewise yellow. 



Synthorax black dorsally, with a pair of rather broad yellow 

 dorsal stripes, meeting the yellow mesothoracic collar, which is 

 widely interrupted in the middle line. Sides yellow, with black 



FlG. 16. — Colour-pattern of Gomphus nilgiricus, sp. nov., $ , 

 semi-diagrammatic. 



bands along the lateral sutures, the metepisternite between these 

 bands is darkened so that at first sight the bands appear to 

 coalesce. 



Legs black, rather long; hindermost femora 7*5 mm. 



Abdomen slender, cylindrical, the eighth segment a little wider 

 and deeper than the rest. Black, marked with yellow as fol- 

 lows: — Sides of first and second segments, including the oreillet, 

 which are, however, heavily margined with black ; lateral ventral 

 mark on third segment ; dorsum of first segment, the yellow mark 

 widening apically ; a longitudinal band on the dorsum of the 

 second segment, extending the whole length of the segment, widest 

 basally ; a dorsal line on the third segment, wide at its base, nar- 

 rowing rapidly, extending as a fine line almost to the apex of the 

 segment. Segments 4-7 with fine paired spots lying basally on 

 the dorsum of each. Distal half of 9 yellow. 



Anal appendages black ; upper pair about as long as the tenth 

 segment, curved slightly ventralwards, ending in a fine upturned 

 point. Branches of lower appendage about equal to them in 

 length and equally divaricated. 



Genital structures of second abdominal segment, black in 



