PIERIN^. 
i8i 
upper side, and in a yellower tint on the under side of the hind- 
wings. The former character is, however, variable, and its reduced 
condition is not very marked except in two examples, taken at Etshowe 
in Zululand by Mr. A. M. Goodrich, which present a much narrowed 
apical patch, continued hind-marginally below lower radial nervule 
only by a small separate spot on third median nervule. One Zulu- 
land $ has the border very nearly as well developed as in West- African 
specimens. 
An aberration of the captured by Colonel Bowker in Kaffraria 
Proper, has all the dark markings very faintly shown, the basal red of 
the fore-wings almost obsolete on the upper side, and replaced on the 
under side by ochreous-orange, the hind- wings on both surfaces yellow- 
ochreouSj and the under-side blotches rather indistinct.-^ 
I have not seen an ascertained $ of the typical Argia from West 
Africa, nor have I found any published description purporting to be 
one of that sex,^ but I have examined twelve South-African examples. 
Of seven now before me, three have the hind- wings white on the upper 
side. The rich red and yellow colours borne by the ^ are in singular 
contrast to the plain tints of the $, and there can be little doubt that 
they simulate those of the abundant and slow- flying Mylothris Agathina, 
(Cram.), a species which (as stated above, p. 45) appears to be also 
the object of direct mimicry by both sexes of Pieris Thysa, Hopff. 
This fine Eronia seems to be more prevalent in Zululand than elsewhere 
in South Africa, only scattered specimens having occurred in Kaffraria and 
Natal. The two $ s noticed in my former work were noted by Colonel Bowker 
as taken near the Bashee River in February 1863 ; they settled on Plumbago 
flowers. The late Colonel Tower's Zululand examples were captured in the 
winter months, and the two $ s above specially noticed by Mr. A. M. Goodrich 
in October and November 1886 respectively. 
Localities of Eronia Argia. 
I. South Africa. 
D. Kaffraria Proper. — Bashee River (/. H. Boivker). 
E. Natal— D'Urban (/. H. Boivker). Pinetown {H. C. Harford). 
^ In Rhopcdocera Africce Australis — haying at the time only this specimen and one ordi- 
dinary ? — I mistakenly treated them as sexes of a presumed new species, which I named 
E. varia. Individuals of both sexes (from Zululand) did not reach me until 1867, and I 
then recognised the $ as Argia, Fab. 
^ Mr. Butler [Proc. Zool. Soc. Lond., 1888, p. 96) identifies the ? with both E. Poppea, 
(Donov.), and (yellow form) Idotea, Boisd., and remarks that the females of Argia are known 
to be extremely variable. I inspected both these forms in the late Mr. Hewitson's collec- 
tion. Both have the black border of the wings very much more developed than in the 
Southern ? (especially in the hind-wings) on both surfaces ; the former sometimes has the 
fore-wing ochre-yellow, while Idotea is bright lemon-yellow in both wings, simulating the 
appearance of the West-African Pieris lanthe, Doubl. Mr. Butler {loc. cit.) states that the 
6 Argia from Kilima-njaro does not differ from Sierra Leone specimens ; his description of 
the single ? from that locality agrees with the characters of the Southern ? , except that 
the border of the wings is apparently better developed. 
