300 ME. W. E. KIEBY — A EEVISION OF 



Has much external resemblance to Macromia, but for the open cells and the discon- 

 tinuity of the last antenodal subcostal nervure on the fore wings. The latter character 

 is of the greatest importance ; for (with a single doubtful exception) every species of 

 Corduliinee known to me has the last antenodal nervure continued on the lower costal 

 space, an arrangement which is only occasional in the Libellulinse. 



(Plate LIII. fig. 1 ; appendages, Plate LVII. fig. 9.) 

 Frontal tubercle slightly concave; eyes contiguous in front; abdomen as long as the 

 hind wings, of moderate and nearly uniform thickness beyond the base, which is 

 gibbous, and considerably thickened when viewed laterally, segments 2 and 3 cari- 

 nated, segment 8 not perfoliate in female : wings rather long and pointed, pterostigma 

 moderate; fore wings with 10-11 antenodal and 9-10 postnodal nervures, the last 

 antenodal and the first three postnodals not continuous, cells of the postnodal area 

 simple, triangle moderate, rather oblique, just beyond the level of that of the hind 

 wings, traversed, and followed by three rows of cells increasing, no supratriangular 

 nervures, one cross nervure in the lower basal cell, subtriangular space consisting of 

 three cells, sectors of the arculus separated or rising from a very short stalk, rather 

 abruptly curved at the extremities, and the lower one slightly waved beyond the 

 middle, nodal and subnodal sectors gradually curved, and the intermediate cells bisected 

 towards the hind margin, nodal sector waved towards the base, very slightly in the 

 middle, upper sector of the triangle rather long ; hind wings broader than the fore 

 wings, with 6 antenodal and 9-10 postnodal nervures, the first three postnodals not 

 continuous, triangle free, its base nearly on a level with the arculus, followed by two 

 rows of cells increasing, no supratriangular nervures, one cross nervure in the lower 

 basal cell, sectors of the triangle hardly separated at base : anal appendages of both 

 sexes at least as long as the ninth segment, lower appendage in the male very broad, 

 short, and bifid at the extremity ; appendages of the second segment not conspicuous. 

 Type Cannacria batesii, sp. n. 



Genus 63. Neoctsta, g. n. 

 Male. — Frontal tubercle truncated, hardly concave above ; eyes contiguous near the 

 front for one third of their length ; abdomen rather slender, about as long as the hind 

 wings, the basal segments inflated, but not gibbous, segments 2 and 3 carinated, seg- 

 ment 4 not carinated nor contracted at the base : wings and pterostigma rather long ; 

 fore wings with 16-18 antenodal nervures, the last continuous, and 12-15 postnodals, 

 the first three not continuous, cells of the postnodal area simple, triangle moderately 

 long and narrow, traversed, on a level with that of the hind wings, and followed by 

 three rows of cells, no supratriangular nervures, one cross nervure in the lower basal cell, 

 subtriangular space consisting of four cells, sectors of the arculus stalked, arched at 



