320 MR. W. F. KIEBT — A REVISION OP 



being clear ; its outline runs down to the hind margin nearly below the last antenodal 

 cross ner^^are, but with two irregular dentated projections in the middle. Pterostigma 

 short, black, about twice as long as broad. The transparent portion of the wings is 

 iridescent hyaline, especially beyond the middle of the wings. Anal appendages of 

 ordinary form, about as long as the last two segments of the abdomen. 



Hah. Borneo. 



Allied to B. semihyalina, Desj., from Mauritius, and B. resplendens, Selys, from 

 Australia and New Guinea; but (apart from other differences) the transparent portion 

 of the wings is clear hyaline in these species. 



One male has the opaque part of the wings black, shading into greenish and deep 

 violet, and less extended, ceasing beyond the third antenodal cross nervure on the fore 

 wings, and only extending to the triangle (which it does not invade) at the inner and 

 upper angle ; on the hind wings it ceases at the last nervure before the nodus. It 

 is probably a variety, but may be distinct, as the anal appendages seem rather shorter 

 than in typical specimens. 



Ehtothemis cupeina. (Plate LI. fig. 6.) 



Long. Corp. 25 millim. ; exp. al. 52 millim. ; long. pter. 2 millim. 



Female. — Head violet above, reddish below, clothed with long hair in front, rhina- 

 rium black. Thorax clothed with long grey hair, coppery green above and reddish 

 below. Legs long and slender, reddish brown, darkest on the tibiae. Abdomen violet- 

 black above, with slight coppery-green reflexions on the sides, and reddish beneath. 

 Wings brown, with a strong coppery iridescence, the principal nervures brown, most of 

 the cross nervures coppery green; pterostigma concolorous, but the apex of the fore wings 

 beyond, as far as the subnodal sector, an irregular space occupying the first two sub- 

 nodal cells, and descending as far as the upper sector of the arculus, a small spot just 

 beyond the apex of the triangle, several cells below, on the inner margin, and a spot 

 on the hind margin at the extremity of the sectors of the arculus, clear hyaline ; several 

 of the cells near the costa and base are likewise slightly marked with paler in the 

 middle. On the hind wings the transparent space beyond the nodus does not extend 

 to the costa, and that at the apex is smaller, semicircularly scooped out on the costa 

 from just beyond the pterostigma to the apex ; from the inner margin beyond the grey 

 membranule run two rows of subhyaline spots, slightly converging, and ceasing a little 

 before and nearly below the triangle ; beyond the lower row are two more spots placed 

 obliquely downwards in the direction of tlie hind margin ; besides these there are three 

 or four more distinctly hyaline and larger spots above the upper sector of the triangle, 

 beyond the first row of discoidal cells ; all the cells on the hind margin, between the 

 anal angle and the extremities of the sectors of the arculus, are likewise subhyaline. 

 Neuration somewhat irregular, but very similar to that of B. notata, Fabr., to which 

 this species is closely allied ; fore wings with 8 antenodal and 7 subnodal nervures. 



