190 
SOUTH-AFRICAN BUTTERFLIES. 
and a few $ s (all yellow) ^ about D'Urban, but did not meet with the 
species elsewhere. Like the Eronice, these swift flyers were fond of the 
flowers of Vinca rosea, and repeatedly stopped in their headlong flight to 
settle on them. The stragglers seen by me at Cape Town usually pitched on 
the scarlet flowers of a Pelargonium. 
I have already referred (vol. i, p. 31) to Colonel Bowker's observation of 
an immense migrating host of this butterfly in Basutoland, and reproduce here 
his interesting account ^ of what he witnessed : — " During my trip to No- 
Man's-Land in March 1869, I crossed the Maluti Mountains at two diff'erent 
points, going and returning • and throughout the journey, whenever there was 
a gleam of sunshine between the prevalent showers, the exodus of FloreMa 
and Rhadia continued in one uninterrupted stream. These butterflies were to 
be seen in countless numbers, from the deepest and darkest valleys through 
which the Orange River forced its way, up to the highest peaks, 10,000 feet 
above the sea, and all were steadihj inoving on eastward. Sometimes one of 
them would stop to take a sip from a tempting gladiolus, or even turn back a 
few yards for that purpose ; but it would be only for a minute, and then off 
he would hurry again, as if fearful of being left behind by his comrades. I 
have noticed the same swarms in the Trans-Keian country, and also in the 
Cape Colony. In the latter, I believe, other members of the Pieridx were 
concerned." ^ 
Judging from its known localities, this powerful insect ranges over all the 
Ethiopian Region (except the north-west extra-tropical tracts), including most 
of its islands, and penetrates as far northward as Syria. In South Africa it 
is generally distributed, but appears to be nowhere permanently abundant, 
though more prevalent in the northern tracts towards the tropic. 
Localities of Callidryas Flordla. | 
1. South Africa. 
B. Cape Colony. 
a. Western Districts. — Cape Town (occasional visitor). Van Wyk's 
Vley, Carnarvon District [E, G. Alston), Springbokfontein {G. 
A, Reynolds) and Ookiep {G. Warden), Namaqualand District. 
Knysna. Plettenberg Bay (the late W. H. NeivdAgate), 
h. Eastern Districts. — Grahamstown (If. E. Barber), Kleinemond 
River, Bathurst District {H, J> Atherstone). King William's 
Town (TT. S. M. U Urban and J. H. Bowker). Colesberg (A. 
F. Ortlepp). Burghersdorp (Z>. R, Kannemeyer). 
c. Griqualand West. — Kimberley (M. E. Barber and H. E Feltham). 
Barkly, Vaal River (if. E, Barber and J, H. Bowker), 
d. Basutoland. — Maseru (/. H, Boivher). "Maluti Mountains." — 
J. H. Bowker. 
C. Orange Free State. — Bloemfontein {Dr. H. Exton). 
D. Kafi"raria Proper. — Butterworth and Bashee River (/. H. BowJcer). 
E. Natal. 
a. Coast Districts. — D'Urban. "Lower Umkomazi." — J. H. 
Bowker. 
b. Upper Districts. — Maritzburg (Mrs, Francis), Estcourt (/. M. 
H'utchinson), 
1 Mr. A. D. Millar informs me that, as a rule, the yellow $ is not so numerous about 
D'Urban as the white one. He notes that, "if any females are about, the males are blind 
to fear and easily caught." 
- Published by me in Trans. Ent. Soc. Lond,, 1870, p, 383. 
3 As regards the Trans-Kei (Kaffraria Proper), Colonel Bowker noted in March 1863 
that Flordla suddenly appeared in thousands, but became rare by the middle of April. 
