i88 
SOUTH-AFRICAN BUTTERFLIES. 
from Sierra Leone, and also from Kilima-njaro, and have captured them 
flying together in Mauritius/ 
Notwithstanding the Aden evidence, Mr. Butler (loc. cit.) keeps 
apart Pyrene, Swains., Hyllaxt, Boisd., Aleurona, Butl.,^ and Florella, 
Fab., but he admits the great difficulty of assigning ^ s to the several 
$ s so separated ; and I must say that the copious material arranged 
by him in the British Museum collection seemed to me, upon thorough 
examination last year (1886), to show very satisfactorily that there 
is not more than one variable species concerned. 
Swainson (op. cit.) figures as Pyrene an ordinary with the under 
side rather dull yellowish and its hatching moderately distinct, and a 
small white $ (upper side only) nearly resembling the He notes 
that the $ was one of about twenty brought by Burchell from the 
interior of the Cape, but that the $ was discovered in Haworth's col- 
lection. Mr. A. G. Butler first called attention {Cat. Fah. D. Lep., p. 
224, 1868) to the resemblance borne by Fabricius' type oi Florella 
in the Banksian collection to the Bhadict of Boisduval, and upon in- 
spection of this example in 1881, I found it to be unquestionably 
(though very worn and faded) identical with Boisduval's insect. The 
lack of any $ approaching the Florella ( = Rhadia) colouring led me 
early to the conjecture that these yellow $ s could only be associated 
with Pyrene ; and the subsequent capture (by myself at D'Urban ^ 
and by Colonel Bowker at King William's Town * respectively) of two 
pairs in cojndd, served to confirm that view, the $ in each case being 
of the ordinary Pyrene pattern and the ^ a yellow Florella.^ Mr. H. 
L. L. Feltham writes to me that in 1886, at the junction of the 
Modder and Vaal Rivers in Griqualand West, he found a large number 
of pairs at rest, and that in all the cases examined (from twenty to 
thirty pairs) the $ was yellow. 
Larva. — Yellowish-green dorsally, minutely granulated with black ; 
pale glaucous- greenish laterally ; the two colours separated by a rather 
wide, conspicuous yellow stripe. Head coloured like the back. Legs 
pale glaucous-greenish. Feeds on Cassia aracho'ides.^ 
^ Mauritian specimens are in both sexes smaller than the ordinary Continental ones, 
and some from the Comoro Islands in the British Museum are still smaller. 
2 From Mr. Butler's description {loc. cit. in synon.), and his remarks in the paper just 
quoted on the Aden forms, I think that his C. rufosparsa, founded on a ? from Madagascar, 
cannot be separated from Aleurona, 
3 26th March 1 867. ^ 12th September 1870. 
^ The capture in copula at Aden, by Major Yerbury, of similar sexes of the Pyrene 
pattern is recorded by Mr. Butler {Proc. Zool. Soc. Lond., 1884, p. 487). 
Mr. A. D. Millar has sent me the paired sexes captured by him at D'Urban on lOth 
February 18S8. The $ in this case is worn and rather small ; it appears to have had a 
faint tinge of yellow (with slight traces of spots) along the hind-margins, but is otherwise 
all greenish-white; the disco-cellular spot of the fore-wings is rounded much as in the 
yellow ? . 
Mr. A. D. Millar has forwarded to me a specimen of the Cassia upon which he has 
observed Florella laying eggs at D'Urban, Natal. It has been kindly determined by Mr. 
MacOwan as Cassia corymbosa, an introduced South American species. 
