I9I4-] F. F. LaidIvAw : Odonata, 339 



not attempt to refer the present specimen to any of the 'species' 

 or ' races ' of the group. 



According to Kriiger (1902) the distribution of these species 

 is as follows: — 



R. fulgens, de Selys. Sumatra, Banca, Borneo, Singapore, 

 ,, C7iriosa, de Selys. Siboga, .Sumatra, Borneo, Singapore, 

 ,, obsolesccns , Kirby. Sumatra^ Borneo, Ceylon. 

 ,, pygmaea, Bvs.uer. New Guinea, Celebes, 

 I have compared the specimen with an individual belonging 

 to this group from Borneo, and can find no specific difference. 



26. Tholymis tillarga, Fabr. 

 I & Dcjoo. 



CORDULIINAE. 



27 Hemicordulia asiatica, de Selys, 



I cf Dejoo, N. Lakhimpur, base of hills, Upper Assam 

 [H. Stevens). 



This is one of the most interesting forms in the collection. 

 Only one other specimen of the species is known, a male in the 

 Selys' collection, from the Khasi Hills. 



Mr. Stevens' specimen is fully mature and a little damaged. 

 It agrees well with the type, whose wings and anal appendages 

 have been figured by Martin (1907). 



This species is apparentl}^ the only representative of the 

 Eucordulina in tropical continental Asia. It belongs to a genus 

 whose headquarters are in Australia. An allied species is found 

 in Celebes and Borneo, and probably elsewhere in Malaysia, as 

 well as in Papua; whilst closely related forms occur in Madagascar 

 and in the Seychelles. It would thus appear to belong to an an- 

 cient 'stratum' of the Odonate fauna of the Old World tropics. 

 Possibly some of the genera allied to Coeliccia amongst the 

 Agrioninae belong to the same level although these do not appear 

 to be represented on the Australian continent, whilst they occur 

 in Papua. 



AESCHNIDAE. 

 AESCHNINAE. 



28. Anax guttatus, Burm. 



1 o' adult, 28-v-io {H. Stevens). 



This species is widely distributed, ranging from the Seychelle 

 Is. to Queensland. 



29. Gynacantha khasiaca, MacLachlan 



2 of & adult (in spirit), Kobo, alt. 400 ft., 8-xii-ii, Abor 



Exped. (5. IF. Kemp). 

 Originally described from the Khasi Hills, as the name implies. 

 These specimens have retained well their colouring, which is very 

 brilliant. The head and eyes are green, with a black T-shaped 

 mark on the frons above. 



