THE SUBFAMILY LIBELLULIN.E. 285 



not thickened, segments 2 and 3 carinated, segment 8 not perfoliate : fore wings rather 

 narrow ; hind wings broad, moderately long and slightly pointed at tips, pterostigma 

 moderate; fore wings with 17-18 antenodal nervures, the last not continuous, and 

 10-12 postnodals, the first two or three not continuous, cells of the postcostal area 

 simple, triangle moderate, a little beyond that of the hind wings, traversed, the outer 

 side oblique, and followed by four rows of cells, then three, and afterwards more, sub- 

 triangular space consisting of five cells, sectors of the arculus stalked, the lower sector 

 very slightly undulating, three supratriangular nervures before the triangle and some- 

 times one above, lower basal cell with 2-3 cross nervures, nodal sector only slightly 

 undulating, the nodal and subnodal sectors continuous and only moderately curved, 

 cells between the nodal and subnodal sectors bisected towards the hind margin ; hind 

 wings with 12-13 antenodals, the last or one of the intermediate ones not continuous, 

 and 11-12 antenodals, the first three not continuous, triangle traversed, followed by 

 three rows of cells, its base corresponding with the arculus, one supratriangular nervure, 

 and one cross nervure in the lower basal cell, sectors of the triangle united at the base : 

 anal appendages moderately prominent. 

 Type Untamo apicalis, sp. n. 



Genus 37. Lyriothemis. 

 (Plate LIU. fig. 5.) 

 Brauer, Verh. zool.-bot. Ges. Wien, xviii. pp. 180, 365, 728 (1868). 



Frontal tubercle bifid ; eyes contiguous for a moderately long space ; abdomen rather 

 broad, triquetral, of nearly uniform width, much shorter than the hind wings, the base 

 not thickened, segments 2 and 3 carinated, segment 8 slightly perfoliate in female : 

 wings broad, especially the hind wings, moderately long and obtusely rounded at tips, 

 pterostigma moderate; fore wings with 16-20 antenodal and 9-12 postnodal nervures, 

 the first two postnodals not continuous, cells of the lower postcostal area usually more 

 or less bisected towards the apex, beyond the pterostigma, triangle rather short, tra- 

 versed, -on a level with that of the hind wings, the outer side generally very oblique, 

 followed first by three rows of cells, then by several rows of two, then by three and 

 more, subtriangular space consisting of three cells, sectors of the arculus stalked, one 

 supratriangular nervure before the triangle, lower basal cell with two or three cross 

 nervures, nodal sector only slightly waved towards the base, cells between the nodal 

 and subnodal sectors simple, or only the last bisected, these sectors, as well as those 

 of the arculus, nearly continuous, but towards the extremity very strongly curved 

 downwards to the hind margin, almost at a right angle, lower sector of the triangle 

 nearly as long as the upper, slightly and regularly undulating; hind wings considerably 

 broader than the fore wings, with 12-13 antenodal and 10 postnodal nervures, the 

 first two or three postnodals not continuous, triangle traversed, followed by two rows of 

 cells, its base corresponding with the arculus, one supratriangular nervure occasionally 



