31^ Mn H. J. Ehves 07t the 



the markings more diffused. The most typical sihifica I 

 have come from near Orenburg. The Asiatic form has 

 usually been called hcseholus, Nordmann, but Stalidinger in 

 Iris, V, p. 304-5, states that this name should be applied 

 to the form from the Kentei Mountains in Central 

 Mongolia (the most easterly locality in which apollo has 

 been taken), which differs principally in having the black 

 spots and markings of the fore-wing, and also the red 

 ocelli of the hind-wing, smaller than in other forms of 

 apollo. I have specimens from the Thianshan from 

 Grum's collection which agree with those from the Altai, 

 except that the males have the lower half of the fore-wing 

 above quite free from dark scales, the outer part of the 

 wing being pure milk-white. 



4. P. dclius, Esp., and var. intermedins, Men. 



First seen in the Tchuja Valley near Tchebit at about 

 4000 feet elevation flying on rocky slopes covered with 

 brushwood, males only being out on June ISth. Common 

 about Darkoti from 6500 up to about 8000 feet on bare stony 

 mountains from July 14th to 18th, when I first took females; 

 also on the pass between Kurai and the Bashkaus at the 

 end of July, when the males were worn out at GOOO — 7000 

 feet. Saxifraga aizoidcs, the food plant of the larva in 

 Europe,was common in most places where I took delius. The 

 specimens from Tchuja Valley and Kurai Pass were of the 

 form known as inter nicdius, Men., of which the males differ 

 from the European form only in being of a slightly purer 

 white ground colour; the females, like those of ajjollo, 

 differ in having as a rule much more dark markings and 

 lunules, as in some of the American forms; but after 

 comparing a very large series from various parts of 

 Europe, Asia, and America, I do not see my way to define 

 inter inedius, because the variation is too great among 

 them. One female from Kurai is darker than any delius 

 I have ever seen except from the Irkut Valley, and re- 

 sembles some of the forms known as Heriiiodur from north 

 America. Another from Ongodai is of a milky-white 

 ground colour with red ocelli as large as those of nomion, 

 and some are hardly distinguishable from European 

 specimens. 



The form which I took about Darkoti is, however, 

 very unlike these, and might be separated with more 



