THE SUBFAMILY LIBELLULIN.E. 311 



wings followed by two and then more cells ; upper sector rising a little above the 

 lower angle ; on the hind wings the upper sector of the triangle rises about the middle 

 of its outer side. 



Type Libellula phryne, Perty. 



Genus 82. Nannodythemis. 

 (Plate L1I. fig. 5.) 

 Brauer, Verb, zool.-bot. Ges. Wien, xviii. pp. 369, 726 (1868). 



Frontal tubercle rounded ; eyes contiguous in front ; abdomen a little thickened at 

 the base, the middle segments slender, and the hinder ones considerably thickened and 

 somewhat flattened, longer than the hind wings, segments 2-4 carinated : pterostigma 

 moderate, a little longer on the hind wings (as is the case to a less extent in the allied 

 genera) ; fore wings with 5 antenodal and 3-5 postnodal nervures, the first postnodal 

 not continuous, cells of the postcostal area simple, triangle converted into a trapezium, 

 free, followed by two rows of cells, the upper row divided towards the hind margin, no 

 supratriangular nervures, subtriangular space consisting of one cell, sectors of the 

 arculus stalked, the upper sector angulated before the nodus, lower basal cell with one 

 cross nervure, the nodal sector much waved at the base, the other sectors very slightly, 

 the intermediate cells simple, the upper sector of the trapezium rising about the 

 middle of its outer side ; hind wings rather broader than the fore wings, with 4 ante- 

 nodal and 4 postnodal nervures, the first postnodal not continuous, triangle converted 

 into a trapezium, as on the fore wings, followed by two and then more rows of cells, the 

 base of the nodal sector slightly waved, but much less so than on the fore wings, no 

 supratriangular nervures, two cross nervures in the lower basal cell, upper sector of 

 the trapezium rising at about the middle of its longest side : anal appendages of the 

 male very short, a little curved downwards, those of the second segment moderately 

 well developed. 



Type Nannodythemis australis, Brauer. 



Genus 83. Nannophlebia. 

 Selys, Mitth. Mus. Dresd. iii. p. 315 (1878). 



Differs from Nannodythemis in its larger size, the absence of any supratriangular 

 nervures, and of more than one cross nervure in the lower basal cell, and in the base 

 of the trapezium of the hind wings being formed by the prolongation of the arculus : 

 fore wings with 7 antenod il nervures ; hind wings with 6 ; 5-6 postnodal nervures on 

 all the wings. 



Type Neophlebia lorguini, Selys. 



