284 MR. W. F. KIRBY — A REVISION OF 



Genus 34. Oxychothemis. 

 Brauer, Verh. zool.-bot. Ges. Wien, xviii. pp. 170, 365, 732 (1868). 



Frontal tubercle bifid ; eyes contiguous ; abdomen moderately and uniformly broad, 

 the base a little inflated and compressed when viewed laterally, segments 2-4 carinated, 

 segment 8 perfoliate in female : wings large ; the hind wings broad, pterostigma mode- 

 rate; fore wings with 15 antenodal and 10 postnodal nervures, triangle long and 

 narrow, traversed by one or two nervures, on a level with that of the hind wings, 

 followed by three rows of cells, sectors of the arculus stalked, one cross nervure in the 

 lower basal cell, nodal sector much waved, the upper sector of the triangle curved : 

 legs strongly spined, the claws not toothed, only those of the hind tarsi with a little 

 notch beyond the middle. 



Type Onychothemis abnormis, Brauer. 



The above description is compiled from Brauer. The genus is distinguished from 



all others by the untoothed claws of the tarsi. 1 am doubtful whether it is correctly 



placed here. 



Genus 35. Libellula. 



(Neuration, Plate LV. fig. 1.) 

 Linn. Syst. Nat. ed. x. i. p. 543 (1758); Latr. Hist. Nat. Crust. Ins. iii. p. 288 (1802). 

 PJatetncm, Newm, Ent. Mag. i. p. 511, note (1833). 

 Piyiphila, Buch. Syst Ent., Odonata, p. 11 (1878). 



Frontal tubercle broad, a little depressed in the middle ; abdomen much shorter than 

 the hind wings, very broad and depressed, with the usual dorsal and lateral carinas, and 

 transverse carinse on the second and third segments, segment 8 not perfoliate in female : 

 wings moderately long and broad, narrowed at the tips, pterostigma moderately long ; 

 fore wings with about 15 antenodal and 12 postnodal nervures, last antenodal nervure 

 almost always continuous, at least on one side, first four postnodals not continuous, 

 cells of the lower postnodal space not bisected, triangle moderate, traversed by two or 

 three nervures, and followed by 3-5 rows of cells, one supratriangular nervure, subtri- 

 angular space consisting of 4-6 cells, sectors of the arculus separated, regularly curved, 

 nodal sector waved, cells between the nodal and subnodal sectors bisected towards the hind 

 margin, lower sector of the triangle arched, comparatively regular ; hind wings broader 

 than fore wings, lower basal cell with two cross nervures, the triangle traversed and some- 

 times reticulated, generally consisting of three cells, and more rarely of two or four, one or 

 two subti'iangular nervures, sectors of triangle united at base : anal appendages short. 



Type Libell-ula depressa, Linn. 



Genus 36. Untamo, g. n. 

 (Plate LIII. fig. 4.) 



Female. — Frontal tubercle truncated; eyes contiguous; abdomen moderately broad, 

 a little compressed and slightly tapering, much shorter than the hind wings, the base 



