THE SUBFAMILY LIBELLULIN.E. 335 



latter distinctly denticulated ; upper appendages as long as the ninth and tenth segments, 

 thickened below, and slightly turned up and pointed at the tip ; lower appendage not 

 visible. Wings hyaline, with black uervures; fore wings with 21 antenodal and 21 

 postnodal nervureSj the last antenodal nervure continuous ; postnodal nervures of the 

 lower space irregular, and a double row beyond the pterostigma ; sectors of the arculus 

 stalked, nodal and subnodal sectors undulated, upper sector of triangle regular ; triangle 

 moderate, followed by three rows of cells, traversed, and with a supratriangular nervure ; 

 subtriangular space consisting of four cells ; pterostigma long, very dark brown, between 

 black nervures ; hind wings with the triangle traversed, and one supratriangular nervure ; 

 membranule very small, white. 



Hal. Makian. 



Allied to Orthemis coronata, Brauer. 



Nesockia woodfordi. 



Long. Corp. 50 millim. ; exp. al. 85 millim. ; long. pter. 5 millim. 



Face yellow, frontal tubercle and upper part of clypeus violet, mandibles and labium 

 black, the sides of the latter broadly yellow, back of head black, with a yellow spot on 

 each side behind the eyes. Thorax black above, the dorsal line nearly concolorous, a 

 short double pale line near the front, a yellow spot within the inner angle of the 

 hinder prothoracic lobes, and the interalary space with the scutellum &c. spotted witii 

 yellow; sides of the thorax almost entirely yellow behind the first suture, before it 

 there is a yellow spot on the collar adjoining a larger one on the prothorax, and there 

 are two small ones on an extension of the black colour below the fore wings ; portions 

 of the hinder sutures, and the middle of the prosternum, especially before the front 

 legs, are also largely black. Legs black, the basal half of the front femora yellow 

 beneath. Abdomen red, the extreme base, and all beyond the eighth segment, black. 

 Wings hyaline, with fuscous nervures, the lower antenodal subcostal space and the 

 lower basal cell filled up with smoky brown to beyond the arculus. 



Hah. Alu Island, Solomon Islands. 



Possibly allied to AgrioJioptera longihidinalis, Selys. 



Lathrecista teejiinalis. 



Long. Corp. 40-43 millim. ; exp. al. 72 millim. ; long. pter. 4 millim. 



Face yellow, frontal tubercle and front (except at the sides) steel-blue ; mandibles, 

 suture of the labium, and back of the head, black. Thorax rufous above, with a double 

 yellowish dorsal line, the sides yellow, with three oblique steel-blue stripes, the first 

 very thick and broadly Y-shaped, the second simple, and the third Y-shaped above and 

 curved below, where it runs horizontally to the base of the abdomen, the space between 

 the wings above, and also the base of the abdomen, as far as the suture on the third 

 segment in fully coloured specimens, densely pruinose in the male. Abdomen rufous. 



