414 Records uf the Indian Museum. [Vol. XXIV, 1922. j 



with H. smnatranus. Lastly H. naninus Foerster, from Tonkin, 

 which I have not seen, is almost certainly not a Heterogomphtis 

 at all. 



Genus not referred to any of the above defined ' groups.' 

 Genus Ophiogomphus 



Species examined: 0. reductus Calvert. 



A genus belonging to the series Gomphus, holarctic in distri- 

 bution, containing a number of robust species of moderately large 

 size, mostly characteristic of mountainous country, whose larvae 

 live in rapidly running rivers with sandy beds. 



Venationally the genus differs from other members of the 

 series noted in this paper by the possession of a small but quite 

 definite ' anal loop.' The arrangement of cross- veins between 

 M 1+3 and Mj, is constant and specialized ; the pterostigma is small 

 and well braced, the triangles of fore and hinder-wings are sub- 

 equal. The hindermost femora reach to the end of the first seg- 

 ment of the abdomen, and are armed with short black spines 

 arranged irregularly for the basal half of the femur, on the distal 

 half in two rows. 



Upper anal appendages of the male as in the group Gomphus ; 

 lower appendage not so long as the upper pair, cleft narrowly for 

 about its distal half. 



Larvae with wing-sheaths divergent. 



This genus may very likely stand as a distinct tribe, but as 

 its distribution is Holarctic and its inclusion in this paper depend- 

 ant rather on political than on zoogeographical boundaries I 

 leave its exact position to be defined in some more appropriate 

 place. 



Ophiogomphus reductus Calvert. 



id. (newly emerged, with exuviae). Kashmir, 191,5. H. T. Pease. 



(890/H1): 

 l$. Kashmir, 1915. H. T. Pease. (582/1 + 1 ). 

 1$. Jhelum Valley, Kashmir, 5200 ft., July, 1916. H. T. Pease. 



(4819/1 + 1). 



Length of hinder-wing of 9 36 mm., of abdomen 40 mm. 



