Odonata frvm Ceylon. 277 



also tlie immediately adjacent cells ; other cliuiacters as ia 

 the male. 



l/ab. Tonkin [Fnihstorfer). 



Allied to Z. insiguis, of which the female is unknown. 

 '^J'he male is very distinct from any other described species of 

 Zjigonidia by possessing two cross-nervnres in the lower basal 

 cell of the hind wings. The female has but one, as usual. 



Genus NeurocenA, Kirb. 

 Neurocena, Kirb. Aun. & Mag. Nat. Hist. (7) v. p. 541 (1900). 



Neurocena ida, Hagen. 



Zygonyx ida, Hagen & De Selys, &c. {cf. Kirb. I. c). 

 Aetirocena ida, Kirb. I. c. ; Laidlaw, Proc. Zool. Sue. Lond. 1902, i. 

 p. 72, pi. V. fig. 1. 



Another specimen ( ^) from Province Wellesley is now in 

 tie Natural History Museum. 



Genus OnychothemiSj Brauer. 



Onychothemis, Brauer, Verb, zool.-bot. Ges. Wien, xviii. pp. 170, 3(35, 

 732 (LStiS) ; Kirb. Trans. Zool. Soc. Lond. xii. pp. 258, 284 (1889). 



Two species only have been described in this remarkable 

 genus : — (.>. nhnonnis, Brauer {U. cc), from the Phili|)piiies, 

 and 0. tcstacea, Laidlaw (P. Z. S. 1902, i. pp. 75, 76, tig. 12 

 (leg), and pi. v. fig. 2), from ]\lalacca. Lihellula /wva, 

 llanib., from Madagascar, doubtfully referred to Onycho- 

 themis by Brauer and Kirby^ is now referred by Karsch and 

 Calvert to Pseudomacromia, Karsch (nee Kirb.). 



I have just discovered a specimen of a third and extremely 

 handsome species in the Natural History Museum which 

 resembles Zygonidia in neuration (last antenodal discon- 

 tinuous, triangle of the fore wings placed beyond the level of 

 that ot the hind wings, base of triangle of hind wings nearer 

 the base of wings than the arculus), but differs from it entirely 

 by the great spines on the femora and tibia3 and the simple 

 claws. Tiiere is no carina on the fourth segment. 



Onychothemis notahilis, Kirb., sp. n. 



Long. Corp. 54 mm.; exp. al. ant. 100 mm,, hit. 11 



m m , 



long. pter. 4^ mm.; hit. al. post. 13 mm., long. pter. 4 mm. 



Female. — Head metallic green above, with the ocelli con- 

 spicuously yellow ; face black, lower border of frons, upper 

 border of nasus, and rhinarium dull yellow, also genoe and 



