ButtcTJiics of Bulgaria. 203 



oi gov gone more than that oi gorge, but tlie veins below are 

 not so white as in that species.* 



93. E. xthiops, Esp. 



We left the country before the proper season for this 

 insect, which I did not see myself, but Mrs. Nicholl took 

 one at Kostenec which she did not preserve. 



94. E. ligca, L. 



Common at tlie foot of the mountains and up to about 

 4000 feet in the first half of July. The specimens large, 

 and typical ligea. 



95. E. curyale, Esp. 



Very abundant in the forest from about 4000 feet, where 

 it just overlapped the range oi ligea, up to about 7000 feet 

 during July. There was little or no variation among them, 

 and not the least difficulty in distinguishing them on the 

 wing from ligca. As far as I can see it is only in 

 Scandinavia, North Russia and Siberia where there is any 

 difficulty in distinguishing ctbrgalc from ligea. 



96. Satyrus semcle, L. 



Whether we were too early for this genus or whether 

 the unusually wet season had retarded their appearance I 

 cannot say, but up to July 20th no species of the genus 

 had made its appearance in the Rilo Dagh; but Mrs. 

 Nicholl caught one of this species on June 4th at Slivno. 



97. S. dryas, Scop. 



This was common on the north side of the Balkans at 

 the end of July, but not seen in the Rilo Dagh. 



98. Pararge iiicvra, L. 



Common in the Rilo up to about 4000 feet. The 

 specimens come very near, except in size, to hicra. When 

 a large number of iiicvra are examined the extent of varia- 

 tion is astonishing, some from Sweden and Norway being 

 hardly distinguishable from hicra. 



* I saw a worn specimen of this species, said to have been taken 

 somewhere in the Balkans, in the Sofia Museum in 1900. 



