142 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXVI. 



line with that of the hind ; sectors of arc fused for a short distance in the 

 forewing, for a somewhat longer distance in the hind ; arc usually lying 

 between the 2nd and 3rd antenodal nervures or occasionally between the 

 2nd and 3rd (this point very variable) ; 8th nervure in the hindwing 

 springing from the anal angle of trigone ; antenodal nervures 9-18, the final 

 complete ; base of trigone in the hindwing generally at the arc or it may 

 be a little distal or proximal ; 1-5 cubital nervures in the forewing, 

 2 or more in the hind ; supernumerary nervures to the Bridge very 

 often present ( this point very variable } ; trigone in the forewing very 

 broad, traversed ; sub-trigone in the forewing with 2-5 cells ( usually 

 3) ; trigone in the hindwing traversed, seldom entire ; the distal side 

 straight or bent ; 4th nervure slightly convex or with a distinct costal 

 bay ; the end bent strongly or slightly basalwards at the termen : generally 



1 row of cells between 5 and 5 a\ discoidal field in forewing beginning with 



2 to 3 rows of cells and then gradually or markedly dilating towards the 

 termen ; 8th nervure moderately or strongly curved : generally 2 rows of 

 cells in the anal field of forewing, moderately developed in the hind ; loop 

 markedly variable and presenting all grades of development from a small 

 obtuse angle to a completely developed apical segment. 



Stigma medium. Membrane small. 



Key to Species. 

 Wings relatively short and rounded. 



Antenodal nervures numbering 9-10. 



Distal side of trigone in hindwing moderately bent. 



Only 1 cubital nervure in the forewing. 



Arc usually between the 2nd and 3rd antenodal 



nervures and never distal to the 2nd. 

 4th and 5th nervures bent very slightly at the termen. 

 Apex of loop relatively short . . . . . . . . L. acigastra. 



Wings relatively long. 



Antenodal nervures 13-19. 



Distal side of trigone in forewing strongly bent. 



2 to 3 cubital nervures in forewing. 



Arc generally between the 2nd and 3rd antenodal 



nervures and never distal to the 2nd. 

 4th and 5th nervures bent very strongly at the termen. 

 Apical segment of the loop well-developed and a large 



outer angle present . . . . . . . . . . L. cleis. 



7. Lyriothemis acigastra, Brauer. 

 Calothemis acir/astra, SeJys. 



Fig. 17. — Wings of L. aciffastra (x2). 



