42 MR. H. J. ELWES ON THE GENUS PARNassivs. [.Jan. 19, 
P. TENEDIUS. 
Parnassius tenedius, Eversm. Bull. Mosc. 1851, ii. p. 631; Mén. 
in Schrenk’s Amurl. vol. ii. Lep. p. 14, t. 1. fig. 3, 2. 
Of this remarkable species but little is known, though it has a 
wide range in Eastern Asia, and has been collected recently in some 
numbers by Herr Tancré’s collector in some parts of the southern 
Altai Mountains, in April and May. Eversmann received it first 
from Irkutsk. I have a female specimen collected by Puzilo at Albasin 
on the Zeya river in upper Amurland. Ménétries describes and 
figures a female from Olekminsk on the Lena river. I have seen speci- 
mens in the St. Petersburg Museum, collected by Czernakowsky on 
July 14, 1873, on the lower Tunguska. Major von Hedemann also 
collected this species at the Schilka, in the upper Amur region, in 
May. 
P. tenedius has a pouch-like appendage unlike that of any other 
of the genus, though it has some analogy to that of P. imperator. 
It is very delicate and wax-like in substance, open at the bottom and 
difficult to examine, but the figure I have given will explain its 
structure better than words. Ina female collected by Maack, which I 
saw in the St. Petersburg Museum, the pouch is not developed, but 
eggs of apparently full size are visible inside the abdomen, and I possess 
another in which it is only partially developed; but the two perfect 
females in my collection, together with at least five others which I 
have examined, all agree in the general form and substance of this 
curious appendage. See Plate II. fig. 9. 
The antenne are black, the fringes of the wings show a narrow 
black line distinctly edged with white. The hairy covering of the 
body is less abundant in the males of this species than in most 
other Parnassius; the number and size of the red markings vary 
just as in other species, but those from Amurland appear generally 
to have them most abundantly. 
Nothing is published as to the habits of this species, which is 
very scarce in collections at present. 
P. IMPERATOR. 
Parnassius imperator, Oberthiir, Bull. Soc. Ent. France, 1883, 
p- 79; Et. Ent. ix. p. 11, t. 1. fig. 4, 9. 
This splendid species at first sight presents the most remarkable 
resemblance to P. charltonius, but as soon as one examines the abdo- 
minal appendage, which in this case cannot be called a pouch, it is 
evident that a more different and peculiar structure cannot exist. I 
must refer my readers to the drawing (Plate III. fig. 4), as a de- 
scription alone would give no true idea of its form, which, though in 
evidently very nearly allied to P. discobolus, and indeed hardly separable from 
it. These specimens do not agree with the description above given, which 
makes me think that the name has probably been transferred from the original 
insect described above to what is now sent as P.romanovi. I have to thank 
the Grand Duke also for a pair of P. muzaffir, Gr. Grsh., which also appears 
to be a form of P. actius, and Herr Christoph informs me that P. charltonius 
was also included in M, Grumm Grshimailo’s collection from the same region, 
