270 ME. "W. P. KIEBY — A EEVISION OP 



rarely coinciding, cells of the lower postnodal space simple, triangle generally rather 

 broad and not very acute, placed considerably beyond that of the hind wings, traversed 

 by from 1-4 cross nervures, and followed by from 3-5 rows of cells, one or two supra- 

 triangular nervures generally present, not more than one nervure in the lower basal 

 cell, subtriangular space consisting of from four to ten cells, sectors of the arculus 

 separated, rising at or just above its lower extremity, the lower sector of the arculus 

 and the nodal and subnodal sectors nearly continuous, the cells between the nodal and 

 subnodal sectors frequently bisected towards the extremity, lower sector of the triangle 

 arched, generally more regular than in any of the preceding genera ; hind wings slightly 

 or considerably broader than the fore wings, with from 5-7 antenodal and 7-13 post- 

 nodal nervures, the first two postnodals not continuous, triangle free, followed by two 

 or three rows of cells, its sectors united at the base : anal appendages moderate. 

 Type Libellula phyllis, Drury. 



Genus 10. Pseudothemis, g. n. 

 (Plate LII. fig. 1.) 

 Frontal tubercle truncated above, slightly concave in front ; eyes contiguous in front ; 

 abdomen moderately stout, subcylindrical, not thickened at base, and slightly tapering 

 to the extremity, not more than two thirds as long as the hind wings, segments 

 2 and 3 carinated: wings long, pterostigma moderate; fore wings with 14-15 ante- 

 nodal nervures, the last not continuous, and 9-10 postnodals, the first three or four 

 not continuous, cells of the postnodal area simple, triangle rather broad, traversed, 

 situated just beyond that of the hind wings, the base and inner side forming a right 

 angle, 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 stalked, the lower sector nearly continuous, nodal sector slightly 

 undulated at the base and in the middle, subnodal sector much less so, the intermediate 

 cells only bisected (if at all) close to the hind margin, lower sector of the triangle 

 arched, comparatively regular; hind wings broader than the fore wings, with 9-10 

 antenodal and 8-11 postnodal cells, the first three or four postnodals not continuous, 

 triangle free, followed by two rows of cells increasing ; no supratriangular nervure, one 

 cross nervure in the lower basal cell, sectors of the triangle united at the base, anal 

 appendages of the male stout, as long as the last two segments, and very hairy, those 

 of the second segment not conspicuous: anal appendages of the female conspicuous, 

 fully as long as the eighth segment ; legs clothed with long and slender, but stiff hairs 

 and spines. 



Type Libellula zonata, Burm. 



