624 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXV. 



apical part laterally compressed and projecting more ventralwards than 

 usual in the subfamily. 



Wings hyaline with occasional dark yellowish brown rays in subcostal 

 space nearly up to the 1st antenodal nervure and in the cubital space as 

 far as the cubital nervure. Stigma 2'.'} to 3 mm. 

 Hab. Assam, Bengal, Burma, Malaysia. 



Gemis Amphithemis. 



Amphithemis, Selys. 1891, 



Head moderately large, globular ; eyes shortly contiguous : forehead 

 somewhat prominent, flattened above, with a very prominent foreborder ; 

 suture flush ; vesicle notched. 



Prothorax lobe small, a little arched above, not projecting. 



Thorax moderately narrow. 



Legs moderately long, spined but without any particular specific charac- 

 ter ; claw-hooks moderate, situated about the middle of claws. 



Abdomen long or moderately long, dilated at the base, then cylindrical 

 or fusiform. 



Genital organs, male ; 2nd abdominal segment large : tentacnke fur- 

 nished with foliate hooks ; female; border of 8th abdominal segment not 

 dilated ; vulvar scale very small, deeply notched at the apex. 



Wings rather narrow, the hind not much broader than the fore ; trigone 

 of fore-wing in line with that of hind ; sectors of arc fused for a moderate 

 distance ; arc between 2nd and ?>rd antenodal nervnres ; 8th nervure in the 

 hind-wing removed a short distance from the posterior angle of the trigone ; 

 antenodal nervures 11-13, the final incomplete ; the base of trigone in 

 hind-wing usually moderately broad and variably distal to arc : I cubital 

 nervure in the fore-wing, 3 in the hind ; 1 and occasionally 2 supplementary 

 nervures to the bridge ; trigone in fore-wing broad, its costal side near the 

 distal end, often broken or bent in a somewhat obtuse angle ; trigone in 

 fore-wing free, in the hind, free or traversed ; subtrigone in the fore-wing 

 entire or traversed by one or two nervures ; all hypertrigones traversed 

 (seldom entire in the hind-wing) ; 4th nervure nearly straight but bent 

 slightly basalwards near the termen ; 1 row of cells between /J and 5a ; dis- 

 coidal field in the fore- wing beginning with 2 rows of cells, occasionally only 

 1, near the termen strongly dilated ; 8th nervure short and sharply curved; 

 anal field in fore-wing with 2 rows of cells, in the hind moderately broad 

 with a normal-shaped loop formed of some (i cells and with an obtuse outer 

 angle. 



Stigma small ; membrane very small. 



Key to Species. 



A. Discoidal field beginning with 2 rows of cells. 

 (Very rarely with one.) 



i. Abdomen long and slim, j'^ellow or black. 

 Superior anal appendages slim, twice 

 or more than twice as long as the 



inferior A. racillans, 



ii. Abdomen short and cylindrical, red. 

 Superior anal appendages robust but 



not half as long as the inferior A. curdstyla. 



I>. Discoidal field beginning with only 1 row of 

 cells. 

 Thorax with antero-dorsal, bright-yellow 



bands A. marice 



5. Amphithemis vacillans, Selys. -4mm, Mus., Civ. (leiwcci, .30, ;>. 4o7 (18'Jl). 



