( Ixiii ) 



although not quite so dark as any of them. The exhibit also 

 included one specimen of the form euryaloides which is 

 accredited to euryale in both the above-mentioned works, 

 occurring with the aclyte at Pontresina. 



Mr. Dadd said that as far as he knew the form of euryale 

 with four spots did not occur at Pontresina although adyte 

 was in abundance everywhere. He suggested as a result of 

 these observations that the facts point to one of two things : 

 Either all these forms were forms of one species ; or if any 

 division were to be made, it should be by drawing the four- 

 spotted forms ligea and euryale together and raising the three- 

 spotted form adyte to the rank of a species with the forms 

 ocellaris, and extrema and euryaloides as sub-forms. 



In the Glazer Geberge, where the two first-named occurred, 

 E. ligea was found on the lower levels and E. euryale much 

 higher up. 



Mr. Dadd also exhibited forms of Lycxna corydon from 

 various localities : (a) a typical series from England, and the 

 Thiiringer Wald ; (6) var. apennina from the Sabine mountains ; 

 (c) the iovYa.res7iiceki from the South of France, and {d) a form 

 from Berlin, for which he suggested the name borussia, as 

 being distinct from all other forms, first in the $ by its 

 greater size ; secondly in the extreme width of the black border 

 of the fore-wings. This extends sometimes to such an extent 

 that almost one-third of the wing is covered. On the under 

 side both $ $& and ? $ s are somewhat darker brown than 

 usual. Otherwise the 5 does not differ from the typical form. 

 The same form is reported by Herr Zobel from Osterode, East 

 Prussia, but the series from Friederichroda (Thiiringer Wald) 

 indicated that it did not extend as far south as that locality 

 (described in current year of the Berl. Ent. Zeitschrift). 



Mr. Dadd then proceeded to exhibit a pair of Scodiona 

 helgiaria, var. favillacearia, and a typical S for comparison, 

 this being the only form of the species occurring on the 

 heather around Berlin ; and four examples of butterflies which 

 he suggested as hybrids, viz., Lycxna corydon x hellargus, 

 from Airolo, captured June 1907, hellargus being at the 

 time a common species at the locality. Ccenonympha satyrion 

 X pamphilus, from Wengen in June 1904, both satyrion 



