500 



PAPILIONID^. 



river, and on the Ussuri between Noor and the Ema ; the largest and finest 

 specimens are from the Bureija Mountains, and farther west they become 

 smaller." 



Graeser (Berl. ent. Zeit. 1888, p. 64) states that the larva is velvety black, 

 covered with yellowish hau's, so thick on the sides as to give it a brownish 

 appearance ; there are four triangular red spots on each segment ; the 

 spiracles are ringed with red ; head round and blackish in colour, frontal line 

 shining pale brown ; legs shining black, claspers reddish yellow. Feeds in 

 June on Sedum, and the perfect insect appears from the middle of July to 

 middle of August. 



The specimen described by Oberthiir as davidis was taken by I'Abbc David, 

 in June 18G4, among the mountains of moderate elevation which surround 

 the valley of Lao-hou-hoou, not far from Jchol, four days' journey to the 

 north of Pekin. The figure of this insect in my copy of part iv. of Oberthiir's 

 ' Etudes ' has the fringes entirely black, whilst the antennae are pale, ringed 

 with black and terminating in a black club ; and the black bar at anal angle 

 contains two well-defined red spots. In part xiv. of Oberthiir's work the 

 same specimen is again figured (pi. i. fig. 8), and here the antennte are repre- 

 sented entirely black, the black bar at anal angle is without red spots, and 

 above all the black fringes, to which IVL Oberthiir attaches so much import- 

 ance, arc distinctly interrupted with white between the nervules on .both 

 surfaces of all the wings. Great exactness is claimed for this figure by 

 M. Oberthiir, but, curiously enough, it does not agree with the extended 

 description of davidis which he gives ori p. 3 of the part last mentioned, and 

 which runs as follows : — 



" La fij^uru rlii ddvidis est done tros cxacte ct elle fait ressortir les caractcros do ccttc espccc. 



" Les antonnes sont blanches, fiaement annelces de noir avec la massue epaisse et noire. Les polls 

 do la tote ct du thorax sont jaunatrcs melanges de noir. Les ailes sont gonc'ralcraont 

 obscures avec la frango jiaraissant entiOremcnt noire. Los dessins et tachos sont dans lour 

 ensemble ceux de noniion et d'ailleurs de presque tons les Farnassius. ilais il conviont do 

 remanjucr que la serie marginale des tachos l)lanc-jaunatr3 opaques aux ailes suporieures ofc 

 inferieures est trt's rapjjroclu'c du bord terminal. La pocho cornec consisto en une caverne 

 paraissunt biloltee vuc de face. Le profil on est roprc'sontc' sur la i)Ianclie I. (ig. 15 a." 



Obcrtliiir says thnt lie would l)e inclined to consider davidis a local form of 

 P. honrathi, if it were not for the fact that the antenna?, which in davidis are 

 white with a black club and finely ringed with black, are entirely black in 

 J', lionrailii. 1 cannot agree with him for the following reasons: — The pouch 



