410 Mr. H. J. Elwes’ catalogue of the 
which closely resembles the North-western Horsfeldii 
from the Mandra plateau, in Kulu, taken at 8500 ft. 
by Capt. Graham Young. These are selected from 
35 males and 18 females in my collection. 
The facts as to the geographical distribution of this 
species which we know are as follows :—In E. Tibet, and 
probably S. China, the typical Belladonna of Fabricius is 
the dominant form.* In Sikkim, at 6—10,000 ft., the 
same form, somewhat darker. In Nepal and the North- 
western Himalayas Horsfeldii of Gray is found. In the 
Khasias, and at low elevations in Sikkim, we have 
the dark variety ithiela varying in the colour of the 
abdominal margin, which is sometimes yellowish and 
sometimes white. 
In the North-western Himalayas, Simla, Kulu, and 
elsewhere, we have sanaca, Moore, a much paler form, 
which may be distinct, but I do not know enough of it 
to speak certainly on this point. Capt. Lang says of it, 
P.Z.§8., 1865, p. 491 :—‘‘ Very rare; obtained only in 
one richly-wooded glen far in the interior. Its flight 
was very strong and fast.” 
360. Prioneris thestylis. 
Pieris thestylis, Doubl. Gray, Zool. Mise., p. 76 (1842) ; 
'  Doubl. Hew., Gen., t. vi. fig. 2 (1847). 
? Prioneris seta, Moore, P.Z.§8., 1857, p. 102, t. 44, 
TOS Pa ae 
P. seta, Wall., Trans. Ent. Soc. Lond., 1867, p. 384. 
P. watsoni, Hew., l. c., 1868, p. 100. 
This is, as Mr. Wallace remarks, a very puzzling 
species, which, if I had only seen the two extreme 
forms, I should not hesitate to separate; but, as he 
remarks, there are a series of variations by which 
watsoni or seta is brought nearer and nearer to thestylis. 
From Sikkim I have six males and five females, of 
which four males are thestylis, and two approach watsont. 
From Buxa, in Bhotan, I have a male which is typical 
thestylis. From the Khasias. I have a female which is 
so large and dark, showing caly a trace of yellow at the 
* In: a soleeaad ae received by ‘Mr. Tccoh fae near Ichang, 
on the middle course of the Yang-tse-kiang river, are many speci- 
mens of Belladonna which, though unset when I saw them, seem 
identical with those from E. Tibet. 
