( 1 ) 



leaf, of which only the irregularly anastomosing ribs wore 

 left "■ (p. 85). 



Mr. G. T. Bethune-Baker said that on the edge of Dart- 

 moor last year he took one or two Strymon w-album, Knoch, 

 settled on the ground in the shade with wings closed over the 

 thorax, and the hind-wings were quite still; again in the 

 same month he took one Zephyrus quercus, L., on the ground 

 with its wings well opened but with its hind-wings motion- 

 less : this also was in the shade. In both these cases the 

 insects were on the road, and it was well after 6 p.m. He 

 supposed that in each instance some shock had occurred in 

 the trees above and that the insects had fallen to the ground. 

 On the other hand, years ago at Tintagel he well remembered 

 watching a <$ Polyommatus icarus, Rott., sunning itself on 

 the cliffs with partially opened wings and being struck with 

 the seemingly rotatory motion of the hind-wings, and in the 

 same sojourn he observed a $ ovipositing and the same 

 motion occurring during oviposition. This latter point he 

 recorded in the E.M.M. for 1901, p. 227. 



A mimetic Association of Ithomiine Butterflies and 

 a rare Dioptid Moth. — Mr. W. J. Kaye exhibited, on behalf 

 of Mr. J. J. Joicev, an apparently very rare Dioptid moth, 

 Dioptis pellucida, Warr., (Nov. Zool., viii, 438,) very imper- 

 fectly described from a poor specimen from Rio Dagua, YV. 

 Colombia. Mr. Joicey's specimen, only the second known to 

 us, is described as follows by Mr. Prout : This specimen of 

 Dioptis pellucida, Warr., is a $ from El Tigre, Rio Jamaua, 

 Choco, and shows on the hind-wing a broad brown distal 

 border (partly worn off in Warren's type but apparently 

 there duller and less broad), which brings it into beautiful 

 mimetic association with several Ithomiines occurring in the 

 same district. 



Mr. Kaye contributed the following notes on the mimetic 

 association : The group of small Ithomiine species consisting 

 of Leucothyris amalda amaldina, Pseudoscada lavinia troetschi 

 and Hypoleria vanilia vaniliana* nov., occurring with the 



* Hypoleria vanilia vaniliana, sub sp. nov. 



Fore uiirj like vanilia vanilia except that the interspaces between the 

 veins are clearer and le3s suffused with dark smoky colour. The black 

 discoidal spot, apical band and margin sharper blade and the five 



