1022.] F. F. Laidlaw : Indian Dragonfties. 395 



rax the mesothoracic collar is narrowly interrupted in the middle 

 line, the dorsal stripes join it on either side, and the jnxta-humeral 

 stripes are complete and rather broad. The sides are yellow with 

 very narrow black lines along the sutures. 



The abdomen has a longitudinal median band of whitish- 

 yellow on all the segments except the tenth, complete save for the 

 narrow black sutural rings, bounded on either side by a brownish- 

 black band ; this encloses on either side a lateral baud of yellow, 

 broad and complete on the first and second segments, divided into 

 two parts on segments 3-j by the black mark on the transverse 

 carina of each of those segments. On 8-9 the yellow lateral band 

 is complete, and on the tenth segment it passes entirely to the 

 ventral side, whilst the dorsum of the segment is black. Anal 

 appendages black. The femora are yellow, with brownish-black 

 spines and a dorsal brown band on each, the tibiae are black. 



On the back of the occiput is a curious rounded tubercle of a 

 bright yellow colour 



Length of hinder-wing 33 mm., of abdomen 36 mm. 



The two males in the British Museum labelled as belonging to- 

 this species, one of them so labelled by de vSelys himself, are 

 evidently rather examples of A. occipitalis, as was recognized by 

 de Selys in his latest account of the species {Causeries Odonatologi- 

 ques No. 7, 1894). In this account he remarks further that 

 A. bivittatus has a basal antenodal uervure of the 2nd series. This 

 combined with certain other features emboldens me to remove 

 bivittatus from the genus Anisogomphus , and to erect for it the new 

 genus described above. 



Group Gomphus. 



Fore-wing and hinder-wing showing about equal specialization 

 in regard to the arrangement of cross-nerves between M,_ g and 

 M v Sectors of ^arculus well separated as a rule, approximately 

 parallel and well curved. Cu, and Cu 2 parallel or only slightly 

 divergent on hinder-wing. M 4 and Cu, slightly divergent (or parallel 

 in Burmagomphus) at the level of the nodus, in the fore-wing. 

 Pterostigma braced, basal antenodal nervure of the 2nd series 

 usually absent. Legs variable, in Gomphus, s. str,, rather long. 

 The male often has a conspicuous yellow mark on the dorsum of 

 the ninth abdominal segment. Upper anal appendages of male 

 shaped much like the same structures in the Libellulinae. Lower 

 appendage with its branches divergent, usually a little shorter than 

 the upper pair, and roughly parallel with them. 



A. Hinder-wing of male with its anal border 



rounded. Small insects with reduced venation. 



Body sandy colour ... ... ... Anormogomplius Selys. 



li. Anal border of hinder-wing of male sharply 



angled. 



1. Four rows of cells at least between C112 and 



hinder margin of hinder-wing ... ... Gomphus i.each. 



2. Usually three rows of cells between Cu? and 

 hinder margin of hinder-wing. 



