190 SOUTH-AFRICAN BUTTERFLIES. 



and a few $ s (all yellow) ^ aLout D'Urbaii, but did not meet with the 

 species elsewhere. Like the Eronicv, 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 Eowker'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 different 

 points, going and returning ; and throughout the journey, whenever there was 

 a gleam of sunshine between the prevalent showers, the exodus of Florella 

 and Rltadia 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 cdl were steadihj moving 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 Pieridsc Avere 

 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 CaUidrijas Florella. 



I. South Africa. 



B. Cape Colony. 



a. Western Districts. — Cape Town (occasional visitor). Van Wyk's 

 Vley, Carnarvon District {E. (?. Alston). Springbokfontein {G. 

 A. Reijnolds) and Ookiep {G, Warden), Namaqualand District. 

 Knysna. Plettenberg Bay (the late W. II. Newdigate). 



h. Eastern Districts. — Grahamstown {M. E. Barber). Kleinemond 

 River, Bathurst District [H. J. Atherstone). King William's 

 Town {W. S. M. U Urban and J. H. Bowlder). Colesberg {A. 

 F. Ortlepp). Burghersdorp (Z>. R. Kannemcijer). 



c. Griqualand AVest. — Kimberley (M. E. Barber and H. L. Feltham). 



Barkly, Vaal River {M. E. Barber and J. H. Bowker). 



d. Basutoland. — Maseru (/. //. Boivlccr). " Maluti Mountains." — 



J. H. Bowker, 



C. Orange Free State. — Bloemfontein {Dr. H. Exton). 



D. Kaff'raria Proper. — Butterworth and Bashee River (/. H. Boirker). 



E. Natal. 



a. Coast Districts. — D'Urban. "Lower Umkomazi." — J. 11. 



Bowker. 



b. Upper Districts. — Maritzburg (Mrs. Francis). Estcourt (/. M. 



Hutcliinson). 



^ Mr. A. D. Millar informs me that, as a rule, the yellow 9 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., 1 870, p. 383. 



3 As regards the Trans-Kei (Kaffraria Proper), Colonel Bowker noted in March 1S63 

 that Florella suddenly appeared in thousands, but became rare by the middle of April. 



