i84 
SOUTH-AFRICAN BUTTERFLIES. 
fifth, and sixtli sometimes obsolete ; blue usually extending as far as 
discal row; hind-marginal blackish border linear, usually obsolete or 
fragmentary below third median nervule. Cilia only slightly mixed 
with whitish between nervules. Under side. — Hind-wing, and mode- 
rately-wide costal, apical, and liind-marginal border of fore-iving, didl 
greyish ochrey-yclloiv, tvitJwut or with very faint markings. Fore-wing : 
all the spots as in Thyshe, those above median nervure and its third 
nervule similarly centred with silvery ; submarginal macular streak 
indistinct, ferruginous, with a broad blackish inferior termination above 
submedian nervure ; hind-marginal border unvaried by any crossing 
streaks. Hind-iving : markings either absent altogether or very faintly 
exhibited in outlines indicating the characteristic darker clouding and 
silvery liturge of Thysbc. 
^ Bhte very much j)aler and didler, and not extending to middle 
in either wing ; spots of discal row larger, especially in hind-wing, 
where all six are well developed ; cilia more whitish between nervules. 
Under side. — As in $ ; but in hind-wing the darker cloudings and 
silvery liturie more apparent — especially the latter, which are faintly 
metallic. 
Hind-margins not so dentate as in Thysbe ; the angulation in fore- 
wing blunter, not so prominent. 
It is doubtful wlietlier tliis form is really more than a variety of Thysbe, 
especially as the only $ s (two) I have seen, and also one <^ taken near Malmes- 
bury and another at Port Nolloth, in the Cape Colony, indicate with some clear- 
ness on the under side of the hind-wings the characteristic markings of that 
species. At the same time, the smaller size, blunter outline of wings, usually 
more extended silvery-blue in the ^ , and (even in the examples just specified) 
obscureness of the under side, render OsbecJd easily recognised. The character 
last named approximates this form to Pyroeis, Trim., in which, however, the 
spots indicated are rounded. 
Mr. Aurivillius sent me for inspection the type of this species from the 
Stockholm Museum; it is a He notes {loc. cit.) that it bore the un- 
doubtedly wrong label of "India orientalis." It agreed very nearly with the 
^ mentioned beneath as having been taken by myself at Blaauwberg. 
I took a ^ and a very small $ (exp. only lo lines) at Port JSTolloth in 
August 1873, and did not meet with the form again until September 1879, 
when Colonel Bowker and myself each captured a $ near Malmesbury. At 
Blaauwberg, on the coast of the Cape District, I met with a fine pair in the 
following January ; and Mr. L. Peringuey gave me four similar $ s which he 
captured rather farther to the north, at Paternoster Bay, Malmesbury District. 
Thus far, therefore, it would appear to be a form peculiar to the Western 
Coast Districts of the Cape Colony. There is nothing in its habits to distin- 
guish it from its nearest allies. 
Localities of Zeritis Osbccki. 
I. South Africa. 
B. Cape Colony. — Port Nolloth, Little Namaqualand. Paternoster 
Bay, Malmesbury District (i. Per^>^^7we?/). Malmesbury. Blaauw- 
berg Beach, Cape District. 
