18 Dr. G. B. Longstaff on 
Loat near Kaka and at Gondokoro. The Swedes took it 
at Khartim, also near Kaka. 
In 1909 I met with it commonly at Khartim, where I 
estimated that more than half the chrysippus were of this 
form: I also took a male of the extreme alcippus form 
at Ad-Duwém. 
In 1912 I took one at Kharttim, another on the battle- 
field of Kerreri (about nine miles N.W. of Khartitim), and 
saw others at both places. I also captured single indi- 
viduals at Abba Island, Shambi and Gondokoro. 
From these records it may be fairly said that the distri- 
bution of alcippus covers the whole White Nile district, 
Rothschild does not record it from the Atbara. Though 
it is common at Port Stidan and at Aden, no specimens 
were found in the Peel collection from SomAliland, nor in 
the Bennett collection from Sokotra. 
y. Form dorippus, Klug [called by some authors 
klugui, Butler]. This lacks the transverse white band 
across the fore-wing near the tip, but normally has the 
hind-wings, on the upper surface, of the ground-colour. 
Aurivillius (3. p. 72) considers this a distinct species, a 
view in which probably he now stands alone. 
Capt. Dunn took it on the Bahr al-Zarafa. Loat met 
with it both at Kak& and Gondokoro. It was taken by 
the Swedes at Khartfim. The Rothschild party took it on 
the Atbara, as well as at Khartim. 
Personally I did not come across this form in 1909, but 
in 1912 took a single example at Khartiim. 
It is a common insect both at Port Sfiidan, and at Aden. 
Cholmley met with it to the north of Suakin, while Peel 
found it the dominant form in Somaliland. 
6. Form albinus, Lanzknecht [called by some authors 
dorippus, Klug]. This, which may be said to combine in 
one the two deviations from the type, in that while lacking 
the white bar on the fore-wings, it has the hind-wings more 
or less white, would appear to be by far the scarcest form 
of chrysippus. Aurivillius (3. p. 72) regards albinus as an 
aberration of dorippus. 
Capt. Dunn found it on the Bahr al-Zarafa. Loat took 
a specimen near Kaka and four at Gondokoro. In 1909 I 
took a single specimen at Khartiim. 
It occurs at Port Sid4an, also at Aden. It seems fair to 
assume, though the data are imperfect, that dorzppus and 
albinus occur throughout the White Nile district. 
