420 Records of the Indian Museum. [Vol,. XXIV, 



was bearing it away and had somewhat damaged it. I have seen 

 a second female near Gudalur (August 192 1) which was oviposit- 

 ing in wet sand in the half -dried bed of a mountain stream. The 

 insect was quite fearless and flew backwards and forwards several 

 times passing under my outspanned legs. Occasionally it hovered 

 a few inches above the sand and made stabbing motions with the 

 end of its abdomen in the wet sand. The function of its long 

 ovipositor was thus explained. I had no net on this occasion and 

 though I attempted to take it with a sweep of my hand it eluded 

 me. 



It differs in the few following respects from the above 

 described male : the abdomen is of nearly even width throughout 

 and perfectly cylindrical, the markings are a greenish yellow and 

 on segments 3 to 5 are of the note-of-exclamation type, the dorsal 

 stripe being swollen and rounded at the base of the segments, 

 tapering pin-like to the apex ; segments 6, 8 and 10 are unmarked 

 and 9 has a large, dorsal, yellow mark extending from apex to 

 base in a narrowing point. 



Anal appendages small, conical, pointed, black. 



Vulvar scale of remarkable length, very narrow and pointed 

 and somewhat analogous to the structure as seen in Cordulegaster. 



Gomphus o'doneli, sp. nov. 



A single male from Hasimara Tea Estate, Duars, Bengal, coll. H. V. 

 O'Donel. 



Head very large ; labium pale yellow, the middle lobe bor- 

 dered with black, rest of head black save for two small basal spots 

 on labrum and a narrow stripe across the crest of frons. Occiput 

 curled up at its border and fringed thickly with stiff black hairs. 



Prothorax black, the posterior lobe, a small spot on either side 

 of it, a geminate spot in front of it and the anterior border yellow. 



Thorax black, marked with yellow as follows : oblique dorsal 

 stripes meeting a slightly interrupted mesothoracic collar, humeral 

 stripe represented only by a small spot above. laterally a broad, 

 posthumeral stripe and the anterior three-fourths of the metepi- 

 meron. On the broad black between these two stripes there are 

 three small yellow spots. 



Legs short and robust, entirely black. The hind femora with 

 the surface covered with small spines and a single larger one at the 

 distal end. 



Wings hyaline, stigma dark brown, braced, rather small; 

 membrane very narrow, dark brown ; 2 nervures between Mj v and 



Mi-iH in the forewing, only 1 in the hind ; only 1 row of cells 



between M^ and Mj a at level of distal end of stigma ; Cu^ and 



Cua nearly parallel to wing border ; nodal index 



11-10 



11-10 



rows of discoidal cells at level of node in the forewing ; all triangles 

 entire ; 3 to 4 rows of post-anal cells in hindwing. 



