290 ME. W. F. KIEBY— A EEVISIOX OF 



Genus 44. Pkotoethemis, g. n. 

 (Plate LIV. fig. 7; details, Plate LVII. figs. 6, 6 a.) 



Frontal tubercle bifid ; abdomen shorter than the wings, very broad or moderately 

 broad, a little depressed, with the usual dorsal and lateral carinse, and transverse 

 carinse on the second and third segments, eighth segment of the female perfoliate : 

 wings long, narrow, pointed, pterostigma very long; fore wings with 17-21 antenodal 

 and 9-21 postnodal nervures, last antenodal nervure continuous, the first three or four 

 postnodals not continuous, cells of the second postnodal space bisected between the 

 pterostigma and the apex, triangle moderate, traversed, followed by three rows of 

 cells, frequently a supratriangular nervure, subtriangular space consisting of three or 

 four cells, sectors of the arculus stalked, more or less curved, and the intermediate 

 cells bisected before the extremities as well as those between the nodal and subnodal 

 sectors, nodal sector waved, lower sector of the triangle rather long; hind wings not 

 much broader than the fore wings, the triangle traversed, and sometimes with a supra- 

 triangular nervure, sectors of triangle united at base. 



Type Protorthemis celehensis, sp. n. This genus will also include Ortkemis coronata 

 and metalUca, Brauer. 0. mefalUca may ultimately form another genus, characterized 

 by the metallic coloration, longer and more slender body, larger membranule on the 

 hind wings, and total absence of supratriangular nervures. 



Genus 45. Nesocria, g. n. 

 Frontal tubercle bifid ; clypeus very broad, with a small tubercle on each side ; eyes 

 contiguous ; abdomen moderately stout, a little thickened at the base, and gradually 

 tapering to the extremity, shorter than the hind wings, segments 2 and 3 carinated : 

 wings very long, narrow, and pointed, pterostigma rather long ; fore wings with 18 ante- 

 nodal and 17 postnodal nervures, the first three postnodals not continuous, cells of the 

 lower postnodal space simple, triangle moderate, traversed by two nervures, on a level 

 with that of the hind wings, and followed by three rows of cells, increasing, subtri- 

 angular space consisting of five or six cells, sectors of the arculus stalked, considerably 

 arched at the extremities, lower basal cell with one cross nervure, nodal sector waved 

 beyond the middle and then gradually curved, cells between the nodal and subnodal 

 sectors bisected towards the hind margin and raised to three cells before reaching it ; 

 hind wings not much broader than the fore wings, with 16 antenodal and 15-16 post- 

 nodal nervures, the first two or three postnodals not continuous, triangle free, its base 

 placed at about one fifth of the distance between the arculus and the extremity of its 

 lower sector, followed by two rows of cells, increasing, no supratriangular nervures, 

 one cross nervure in the lower basal cell, membranule very small, sectors of triangle 

 united at base: anal appendages nearly straight, as long as the eighth segment, the 



