90 



THE ENTOMOLOGIST. 



Dr. Chapman (Trans. Ent. See. Sept. 1898), from considerations 

 based on the forms of the gonapophyses, states that " the two 

 recognized forms, ligea, with its vars. adyte and ajanensis, and 

 euryale, with var. ocellaris, whilst usually distinct, are not always 

 so, and in some places intermix." From my own experience, I 

 am inclined to believe that there is only one true species to be 

 derived from the numerous forms included under the two names 

 ligea and euryale — that is to say, that any of those forms are 

 capable of intercrossing and of producing any or all of the rest. 

 I have collected from one confined area, namely, from a somewhat 

 isolated mountain slope above the St. Gervais valley, the follow- 

 ing forms : ligea (typical, with large ocelli), ligea (smaller, and 

 with ocelli replaced by black spots, identical, in my opinion, with 

 var. adyte), euryale (typical, with small ocelli), euryale (only 

 conventionally separable both by clasp-form and wing-facies from 

 adyte forms of E. ligea), euryale var. ocellaris. I can see no 

 valid reason for doubting that these forms are specifically one. 

 In order to bring out the degrees of resemblances and differences 

 that exist between the two so-called species and their varieties, I 

 have drawn up a table showing the amounts of ocellation 

 possessed by them respectively. In giving numerical values to 

 ocelli and spots, I have gone on the rough principle of counting 

 two for an ocellus and one for an unpupilled spot, but I have had 

 to use discretion further than this. The following table is made 

 up from the specimens in the British Museum : — 



Table. 



TO 



;:;: CO 





16 

 15 



14 

 M3 



I 12 

 11 

 10 

 9 

 8 

 7 

 6 

 5 

 4 

 3 

 2 

 1 

 



M8 



