232 Mr. W. F. Kirby on some 



1. Perithemis domitia. 

 Lihellula dojnitia, Drury, 111, Ex. Ent. ii. t. xlv. fig. 4 (1782). 



Exp. cal. 36-38 millim. 



Head yellow, browner behind ; thorax and abdomen choco- 

 late-coloured, thorax with broad olive-green shoulder-stripes, 

 and the sides entirely olive-green except narrow stripes on 

 the sutures ; abdomen with a narrow stripe on each side of 

 the dorsal carina and a broad one on each side of the lateral 

 carina, all these interrupted by the sutures ; wings with six or 

 seven antenodal and from four to six postnodal cross nervures, 

 the last antenodal and first two postnodals not normally con- 

 tinuous ; hind wings with five antenodal and four or five 

 postnodal cross nervures, the two first postnodals not con- 

 tinuous; pterostigma reddish, between black nervures, tri- 

 angles free, followed by two rows of posttriangular cells, 

 increasing ; subtriangular space consisting of two cells divided 

 by a perpendicular nervure : wings in the male transparent 

 yellow, the centres of the cells mostly lighter ; in the female 

 the yellow colour extends along the costa to the pterostigma, 

 but otherwise ceases a little beyond the nodus, leaving the 

 rest of the wings transparent except a small brown spot at 

 the tips of the hind wings. 



2. Perithemis pocakontas, sp. n. 



Exp. al. 40 millim. 



Female. — Intermediate between P. dojnitia, Dru., and P. 

 tJiais, Kirb. ; colour and neuration of the former, but the 

 yellow on the costa ceases two cells before the pterostigma on 

 the fore wings and one cell before on the hind wings ; t!;ere 

 is a brown blotch above and partly covering the triangles ; a 

 brown border, most distinct on the hind wings, runs down 

 below the nodus at the extremity of the yellow portion of the 

 wings ; there is a brown spot towards the anal angle of the 

 hind wings, and the hind wings are much more largely tipped 

 with brown ; the pterostigma, too, appears to be longer on 

 the hind wings than on the fore wings. 



I hesitated at first to describe this insect ; but it seems to 

 be sufficiently distinct to rank as a species. There are pro- 

 bably several closely allied species of this group, and it is not 

 impossible that this insect may prove to be the female of the 

 true domitia of Drury, the typical figure of which is rather 

 larger than the specimens which I have described above under 

 that name. 



