1922.] F. F. Laid law : Indian Dragon/lies. 407 



the upper pair, or these latter may be sharply hooked downwards 

 to lie along the dorsal surface of the lower appendage. 



The insects contained in this section would appear from their 

 colouring to be forest-haunting and shade-loving forms. 



Onychogomphus biforccps Selys. 



1 <* . Pnshok, Darjiling Dislr., May, 1915. (3409/H1). 



This splendid species remarkable for the specialization of the 

 anal appendages of the male, is known only from examples of that 

 sex. Owing no doubt 

 to a misreading of de 

 Selys' account,William- 

 son in his key to the 

 species of Onychogom- 

 phus puts biforceps 

 amongst the species in 

 which the dorsal stripe 



joins the mesothoracic ,;„.. lg -Anal appendages of Onychogomphus 

 collar; this is not the biforceps, Selys, 6\ side view. 



case, the dorsal stripe 

 being isolated. 



The still larger Tonkinese species, 0. camelus Martin, repre- 

 sented in the British Museum collection, has the anal appendages 

 in the male almost identical in shape with those of 0. biforceps 

 but entirely black. 



The dimensions of the Indian Museum specimen are as fol- 

 lows, length of abdomen 35 + 4 mm., of hinder-wing 35 mm. 



Onychogomphus aclnaces, 1 sp. nov. 

 1 3. Castle Rock, N. Kanara Dist. S. Kemp. (4392/H1). 



Very distinct from other described species. 



Head. Lower lip black, yellow at its base. Upper lip black 

 with a pair of transverse, greenish-yellow spots. Ante-clypeus 

 vellow, post-clypeus black. Frons, vertical part black, horizon- 

 tal part yellow, the yellow divided into two distinct parts by a 

 median triangle of black. Vertex and occiput entirely black. 



Prothorax entirely black. 



Synthorax, dorsum black, mesothoracic collar of greenish- 

 yellow, interrupted by black in the middle line. A dorsal band of 

 greenish-yellow on either side, not joining the collar, narrowing to a 

 point below, reaching the humeral suture above. No trace of ante- 

 humeral band. Sides of synthorax largely yellow, but the met- 

 episternite entirely black, the black extending to just behind the 

 second lateral suture, so that laterally the synthorax has two 

 yellow areas widely separated from one another by a broad belt of 

 black. 



1 Acinaces = ;i scimitar. 



