538 Mr. W. F. Kirbj on Odonala from Hainan. 



middle ; arculus angulated where the lower sector rises, the 

 median and subnodal sectors risino- a little beyond the arculus, 

 as in Lestes. Quadrilateral very long-, especially on the hind 

 wings, a little narrower above than below. Pterostigma 

 long and thick, covering from two to four cells, acutely angu- 

 lated inwards on its lower side. Lower sector of the quadri- 

 lateral long, slightly undulated on the fore wings. Nodal 

 sector rising between the third and fifth postnodal cross- 

 nervure, and the ultranodal sector at the level of about the 

 eighth and ninth, above and below which, and also above 

 and below the subnodal sector, are two shorter intercalated 

 sectors, increasing in length as they approach the median 

 sector. On the hind wings there are only three pairs of 

 intercalated sectors, placed below the ultranodal sector, the 

 subnodal sector, and the lower sector of the arculus respec- 

 tively. The fore wings are rather long and narrow, and the 

 hind wings are one third shorter, rather broader, and coloured. 

 Front moderately prominent, rounded. Terminal appendages 

 in male destroyed (probably hooked), in female straight, 

 pointed, longer than the tenth segment ; lower appendage 

 stout, terminating in a strong obliquely raised pointed tooth, 

 below which are a pair of short filiform appendages. 



This is the most remarkable form in the collection, and 

 stands about midway between three distinct subfamilies. It 

 has the colour and general shape of Fseudophcaa dtcoratuy 

 De Selyp, which was received with it; the quadrilateral and 

 pterostigma of Podopteryx ; and the median and subnodal 

 sectors of Lestes, from which it differs, however, in none of 

 the sectors being visibly undulated, except the lower sector of 

 the arculus on the fore wings. It should certainly form the 

 type of a new subfamily. 



14. Pseudolestes mirahilis, sp. n. (PI. XII. fig. 3.) 



Long. corp. 35-37 millim.; exp. al. ant. 56-60 millirn, ; 

 exp. al. post. 42-45 millim. 



Head black; ocelli yellow, in an equilateral triangle on 

 the vertex ; in some males a pale greenisli-blue spot on each 

 side of the inner orbits opposite the frontal ocellus and a 

 transverse band in front of it, and all the rest of the face 

 above of the same colour. Antennee with the basal joint 

 short and thick, the second much longer but of equal thick- 

 ness, the flagellum hair-like, longer than the two other joints 

 together. Body bronzed ; pronotum rather large, with a 

 testaceous lateral band, partly continued on the mesonotum ; 

 mesopleura with three testaceous stripes, the upper one linear, 



