BOR>sEAN DUAGONFLIES. 65 



fauna, having hitherto been met with in the Celebes, New 

 Guinea, and the Solomon Islands. 



The bulk of the genera referred to the Eucordulina group are 

 massed in the Holarctic and in the Australian regions ; with a few 

 species in Extra-tropical S. America, and outliers in the Oriental 

 region, the Seychelles, and Madagascar. On the whole the 

 distribution agrees fairly closely with that of the Coniferaa, and 

 suggests that the two groups must be of approximately equal 

 geological age. 



Tillyard * has pointed out that the Australian genera are not 

 to be regarded as more primitive than those of the northern 

 hemisphere but show specialisation along lines of their own. 

 Somatochlo7^a, perhaps the most primitive, is bi-polar. 



[iVote. — In defining the Eucordulina, I believe that stress should 

 be laid on the convergence of M^ and Cu^ in the front wing as a 

 character especially marking the group. Accordingly I refer to the 

 group all the genera included by Williamson t in his group i., 

 adding to them Cordulephya and perhaps Hesperocordidia^ the 

 latter in deference to Tillyard's views, but I would exclude from it 

 Oxygastra and the genera referred by Williamson to his groups 

 ii. and iii.] 



Group ii. Idocordulixa. 



As I have already remarked, I do not look on this group as 

 satisfactorily defined at present. Here I use it to hold those 

 genera which do not, in my opinion, fit into the Eucordulina on 

 the one hand nor yet into the Macromina on the other. These 

 are genera which fall into groups ii., iii., iv., of Williamson's 

 classification. Whether such genera will not ultimately be 

 found to fall into one or more groups of equal value with the 

 Eucordulina and Macromina I cannot now conjecture. 



2. Metaphya micans Laidlaw t. (PI. lY. figs. 1-3.) 



1 2 . Matang Rd. §, 3.10.10. 



Length of hind wing 23 mm., of abdomen 20 mm. 



The female is more brilliantly coloured than the male, and is 

 amongst the few Cordulines which have really brightly coloured 

 wings. It agrees closely in proportions and in details of vena- 

 tion with the male. 



The membranule is large and uniformly grey. This is also 

 the case with the male. By an error I described it as having 

 the upper third of the membranule white, the lower part dark 

 brown. This description should apply to the single cell foi-ming 

 the anal triangle of the male. 



* Tillyard, loc. cii. 



t Williamson, Ent. News, Nov. 1908, pp. 428-434-, pi. xviii. 



t Laidlaw, Sarawak Mus. Journ. No. 2, 1912, pp. 65-67, pi. i. 



§ All localities mentioned in this paper are in Sarawak, North-west Borneo. 



Proc. Zool. Soc— 1913, No. V. 5 



