222 PHILIP p. CALVERT. 



%. Inferior appendage bifid, its branches divergent; superior appendages at 

 most but little longer than 10, their divergence but little different in 

 width from that of the branches of the inferior ; lateral margins of 8 not 

 dilated into membranous appendages; 2nd joint of penis usually with 

 a tooth ; a salient anal angle. 9 . Vulvar lamina at most hardly longer 

 than half of 9. 10 considerably shorter than 9 (% J ). 



Third femora moderate (when extended backwards reaching no farther than 

 the middle of 2). all the spines short, numerous 14. OoilipllUS. 



Third femora long (when extended backwards reaching to base of 3), with 

 an antero-inferior row of 5-7 spines which are considerably longer than 

 the more numerous short spines 15. Dromogoniphus. 



Subfamily 4. COKDULEGASTERIN^. 



Frons not elevated as high as the occiput, wings not spotted. % with auricles 

 on 2 16. Cortlulegaster. 



Subfamily 5. AESCHNIN^. 



I. Upper piece of the arculus equal to or longer than the lower piece, its upper 



sector arising a short distance above the lower sector, being separated 

 from the latter by a distance i-J of that separating the upper sector from 

 the median nerve. % hind wings with anal triangle, distinct anal 

 angle, auricles on 2. 

 Supplementary sector between the subnodal and median sectors curved at its 

 middle towards the former or its posterior fork to be almost parallel, and 

 separated by 1-2 (rarely 3) rows of cells. 

 Subnodal sector forked at its extremity. 



Subcostal vein not prolonged beyond the nodus; basilar space free; pter- 

 ostigma long, narrow; median space with at least 2 cross-veins in addi- 

 tion to that forming the internal triangle; two rows of cells between 

 subnodal sector and the supplementary sector next below it. % anal 



triangle of 3 cells 17. Episesclina. 



Subnodal sector not forked or branched. 



Basilar and supra-triangular spaces cross-veined. ..18. Foiiscoloiiibia. 



Basilar and supra-triangular spaces free 19. Gotnplife!i<»cIina. 



Supplementary sector between the subnodal and median sectors curved at its 

 middle away from the former or its posterior branch, with 3-7 rows of 

 cells between them at that place. 

 .Subnodal sector forked or with several small branches; suture between the 

 eyes short or moderately long (i. e. not longer than combined length of 

 vertex and frons measured on mid-dorsal line); subcosta not piolonged 

 beyond the nodus 20 Aescliii«. 



II. Upper piece of the arculus shorter than the lower piece, its upper sector arising 



close to the median vein (midway between the latter and the lower 

 sector). % hind wings without anal triangle, anal angle rounded off, 

 no auricles on 2. 

 External branch of lower sector of the triangle in hind wings approaching the 

 upper sector for its apical half, being parallel to it and separated liy one 

 row of cells; 4 ( 'J, ) or 5 ( 9 )--10 usually with a supplementary lateral 

 carina above the usual one 21. Aiiax. 



