274 Mr. W. F. Kiiby on 



the knee, probably followed in perfect specimens bj 3 or 4 

 lonf^ cilia. 



Abdomen slightly dilated at base ; terminal appendages 

 about as long as the eighth segment, which is shorter than 

 the seventh, which again is shorter than the sixth. Upper 

 appendages of usual form, waved and pointed; lower one 

 nearly as long, broad at base, with the narrowed extremity 

 turned upward ; below the basal half is a large oval excres- 

 cence, preceded by a tubercle on the under surface of the 

 eighth segment. 



Wings clear hyaline; pterostigmata, as in all the genus, 

 dark brown ; front wings with 16 antenodal cross-nervures, 

 the last discontinuous on the left-hand side, and 9-11 post- 

 nodals in the upper space, the postnodals rarely coinciding 

 with those in the lower; cells beyond the pterostigma single ; 

 nodal sector undulating, arched strongly downwards at 

 the extremity ; a single row of cells between the nodal and 

 subnodal sectors, except close to the margin ; two cross- 

 nervures in the lower basal cell ; triangle with one cross- 

 nervure above the middle, and followed by three rows of 

 cells, increasing towards tlie margin ; subtriangular space 

 consisting of 3 cells ; upper sector of the triangle rising from 

 its apex, the lower rising considerably beneath it. 



Hind wings with 11 antenodals and 11 postnodals ; 1 

 nervure in the lower basal cell ; base of triangle distinctly 

 nearer the base of the wing than the arculus, and its point 

 not extending to the level of the triangle of the fore wings. 

 Triangle traversed, followed by one row of 3 cells and one or 

 two rows of 2 increasing ; sectors of the triangle rising from 

 a point. 



All the wings rather pointed, owing to their rapid contrac- 

 tion beyond the point where the sectors of the arculus reach 

 the margin. Membranule small, especially on the fore wings, 

 greyish brown, whitish towards the base. 



Feivah. — Head : metallic green above ; face and mentum 

 as in the male, but more broadly and briglitly yellow on the 

 sides, and no yellow in front of the mentum. Eyes brown 

 above, broadly reddish in front and at the sides, which is 

 only faintly visible in the male. 



Thorax and abdomen black above, with 3 yellow median 

 spots between the wings, and a slender yellow line on the 

 carina from the second to the seventh segment of the abJo- 

 men. Pleura with 3 broad yellow bands, separated by 2 

 green ones; first and second segments of abdomen with the 

 transverse carinte yellow, a large yellow trapezoidal lateral 



