INDIAN DRAGONFLIES. 685 



fellow from the other side, finally a posterior stripe on the hinder border of th e 

 metepimeron. 



■ Abdomen black ringed Tvith yellow as follows : — a basal ring on the 2nd segment 

 occupying about its half, rings on segments 3 to 6 extending basalwards from 

 the median transverse ridge of segments but are separated from the base of seg- 

 ments by black, which colour dorsally, extends apically into the yellow, nearly 

 cutting the rings in twain on the dorsal crest, on 7 and 8 the rings occupy the 

 basal half and on 9 there is a transverse, lateral mark. 



In the male, the abdomen is cylindrical, a little tumid at the base and dilated 

 in the terminal segments ; 10th segment with a strong dorsal keel beginning 

 •ndth a pointed tubercle wliich is strongly angled when seen in profile. 



In the female, the abdomen is more robust, not dilated at the end but strongly 

 compressed laterally. 



Anal appendages of the male dark yellow, the superior longer than the lOth 

 segment, subcyhndrical, with a strong spine at about its middle, the terminal 

 half tapered and bevelled. Inferior appendages a little longer, triangular, curv- 

 ing strongly upwards at the end, which is tapered. 



In the female, the appendages conical, pointed, yellow, rather longer than the 

 10th segment ; vulvar scale cleft into two oval, leaf-hke processes which are 

 contiguous and extend as far as the 9tli segme it. 



In specimens taken at Poona (which I think are a local race of this insect or 

 which may be a distinct species), the basal ring on th« 7th segment is also en- 

 croached upon by the basal black, and the ring on the 8th is prolonged in an 

 apical point on the dorsal crest and also laterally. 



The forewings have 14 antenodals and 7 postnodals, the hindwings 10 ante- 

 nodals and 9 postnodals. In the female, the wings are more or less smoky and 

 there are dark, brown rays in the subcostal and median (cubital) spaces extending 

 nearly to the trigone (as in M. rjerstcBckeri). The yellow annules on the abdomen 

 of the female are much broader than in the male and not encroached upon by the 

 basal black. The abdomen is markedly flattened laterally. 



Legs slender, long, brownish black ; coxae and trochanters yellow. 



Ova fusiform, pointed at each end and flattened laterally. 



Deposited by the female whilst hovering and dipping the end of abdomen in 

 water. 



Hab. Madras, Poona, Deccan, Mahableshwar near Bombay, Darjeehng. 

 Generally in wooded districts. Has a habit of hawking up and down glades in 

 the jungle or in lanes and ridings; at midday it takes a short siesta at which time 

 they settle low down on bare twigs or bushes. They may often be seen collect- 

 ing in numbers on such situations and I have seen as many as a dozen, some 

 paired, hanging together on one small bush. May and June are the best months 

 during which this insect may be found, but it is seen more sparingly from March 

 till September. It was very plentiful at Poona in the year 1917 but was scarce 

 from then until 1920. Possibly it may take three years to breed out as the imago. 



Closely related to cingulata, but differs as follows : — 



1. The labium is not bordered with black. 



2. The back of eyes and vertex marked with yellow. 



3. The rings on abdomen broader. 



4. The anterior pair of femora are not bordered with yellow. 



5. The stigma is longer. 



6. The anal border of the hindwings is much more deeply notched. 



(nearly straight in cingulata). 



7. The shape of the vulvar scale. 



8. The size is considerably larger. 

 9. Macromia trituberculata, sp. nov. 



Abdomen : c? and 2 49 mm. ; hind wing : 6 42 mm., $ 45 mm. 

 Head : labium and labrum yellow, both broadly brown at the base ; epistome 

 and frons pale brownish yellow, the latter with a little metallic green above ; 



