294 ^Ii'. II. C':iiU[)inM o?i 



Somatochlora villosa, liaiiib. 

 1 ? , Lago Epuyen, N.W. Chuhuf, xii. 1919-i. 1920. 



Subfamily Libellvlinjl. 



Erythrodiplax coimata connata, Burm. 



7 J , 3 ? , Lago Epuyen, N.W. Cbubut, xii. 1919-i. 1920. 



3 ? , Estancia Maiten, Upper Cbubut River, i. 1920. 



I bave compared tbe males from Lake Epuyen with 

 Calvert's description of Burmeister's type male from Val- 

 paraiso (Trans. Amer. Ent. Soc. xxv. p. 77, 1898), and also 

 witb Chilian material iu tbe British Museum which agrees 

 very well with it. In our Argentine specimens the dark 

 brown basal spot in the hind wing is somewhat larger, and 

 the streaks in tbe subcostal and cubito-anal spaces are 

 confluent. The spot extends outwards as far as the second 

 antenodal, the arculus, a point near the base of the triangle, 

 and tbe cubital suj>plement. In its maximum development 

 posteriorly, the spot is co-extensive "with abdominal seg- 

 ments 1 and 2, which are similarly coloured. In some of 

 the Epuyen examples, also, the abdomen is rather more 

 depressed, as well as a little broader. Otherwise, the two 

 series compared appear to differ in no essential characters, 

 and their specific and subspecific identity may evidently be 

 presumed. 



In the females from Lake Epuyen the abdomen is ratber 

 shorter than in the males taken with them, and not quite so 

 broad. Tbe dark brown markings in the wings of the males 

 are replaced by saffron suffusion, reaching outwards to a 

 point near the arculus in the fore wing and to about the 

 third antenodal and tbe base of tbe triangle in tbe bind 

 wing. The three females from the Estancia Maiten are very 

 similar in size, build, and coloration to tbose from Lake 

 Epuyen, and doubtless belong to the same subspecies. 



Erythrodiplux connata fusca, Ramb. 



3 (5", 1 ? , Isla "Los Cisues,'' Rio Parana, vi.-xi. 1920. 



The specimens are somewhat smaller than a male and 

 female from Buenos Aires, dated 20. ii. 1909, and deter- 

 mined by Ris, with which I have compared them. The 

 basal spot in the hind wings of the males, moreover, is not so 

 well developed posteriorly. For tbe most part, the spot is 



