1886.] MR. H. J. ELWES ON THE GENUS PARNASSIUS. 47 



P. stubbendorfi ab 2 melanophia, Hoarath, Berl. ent. Zeit. 1885, 

 p. 274. 



This species appears to have been first discovered by Lehmana 

 near Kansk in Central Siberia, and has since been found in Dahuria 

 by Radde, and in many parts of the Amur region down to the coast 

 by Christoph, Graeser, and others, v?here it appears to be abundant in 

 many places, and flies from the 19th of May to the end of June or later. 

 On the island of Askold it is not rare, four males in my collection 

 from this place being larger than those from the Amur, and showing 

 traces of the black patches on the cell of fore wing, which are con- 

 spicuous in mnemosyne. In Corea a form occurs which seems inter- 

 mediate between this species and P. glacialis, but has not the yellow 

 body of the latter ; and though I have seen no specimens from the 

 western limit of its distribution, I should expect to find a similar 

 transition to P. mnemosyne. Graeser, however, in Verb. Ver. Hamburg, 

 1879, p. 201, says that when all the specimens sent by Consul Liihdorf 

 and Dorries from various parts of the Amur are compared, he doubts 

 the distinctness of this species from P. mnemosyne, as they show great 

 variation in the amount and distinctness of the black markings, 

 which sometimes are so distinct as to form a complete transition to 

 P. mnemosyne. 



The pouch of the female is similar to that of the last-named species, 

 and in five females in my collection varies only in length, and is 

 sometimes more produced behind than is usual in P. mnemosyne 

 and generally darker in colour. 



P. GLACIALIS. 



Parnassms glacialis, Butler, Journ. Linn. Soc, Zool. ix. p. 50 

 (1866). 



IP. citrinarius, Motsch. Bull. Mosc. 1866, i. p. 189. 



This form, which appears to be found locally in some of the higher 

 mountainsof Japan, is undoubtedly very nearly allied toP.s^M66e«cZor/?. 

 It differs from that species in its larger size and in the well-marked 

 yellow hairs of the neck and breast, which in P. stubbendorfi and 

 mnemosyne are found in the female only. The ground colour of 

 the males is also of a much yellower tint than in P. stubbendorfi. 

 The two females in my collection, which are all that I have seen, have 

 a blackish pouch resembling that of P. clodius in being considerably 

 shorter than the pouch of P. mnemosyne or stubbendorfi. 



Mr. Pryer says of this species, in his Catalogue of the Lepido- 

 ptera of Japan : — " I have taken this abundantly at Nikko in June 

 and July, and received many from Yesso. It varies considerably in 

 size, colour, and markings. I have eleven specimens in my cabinet, 

 no two of which are exactly alike. Yesso specimens are generally 

 whiter than those from Nikko, from whence I have a specimen 

 almost black. Some are without the dark patch on disk of fore 

 wing, others have one and two patches, and a dark band on the 

 outer margin of the fore wing, which sometimes extends to the hind 

 wing. The female has sometimes a peculiar horny sheath attached 

 to the underside of the abdomen." Mr. Strecker says he has re- 



