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Annals of the Transvaal Museum 
marked by plumbeous shading, blackish dots on the veins and sometimes 
whitish irroration arranged in dentate form; antemedian at about one-fourth 
or beyond, sometimes lost in the proximal suffusion; postmedian about 3 mm. 
from termen, fairly direct; a diffuse fawn-coloured, slightly dark-pupilled cell- 
spot. Hind wing somewhat paler, the suffusions rather less strong, more evenly 
distributed; cell-spot weak or obsolete; no antemedian line; postmedian indi- 
cated by slight plumbeous shading and (sometimes very weak) dark vein- 
dots; fringe concolorous with that of fore wing. 
Underside tolerably evenly suffused, the costal edge of the fore wing 
browner, the inner-marginal part of hind wing with hoary admixture; both 
wings with cell-spot brown, very variable in expression, postmedian dots well- 
developed. 
Cape Town, May 1912 (Lord Gladstone). Type in coll. Transvaal Museum, 
paratype in coll. L. B. Prout. 
Evidently a variable species. The only known $ (data as above) is larger 
(46 mm.), the fore wing — as is frequent in the group — more angular, this wing 
much clearer brown, the other shades being largely suppressed. 
54. Oholcola petronaria ab. aliena ab. nov. (PI. I, fig. 3). 
$. Thorax and abdomen above violet-grey, the abdomen with ill- 
defined browner belts. 
Fore wing above violet-grey (about as in the small patch just outside the 
postmedian in normal petronaria) , only the costal edge narrowly of the normal 
colour; median area very strongly suffused with brown (of nearly the shade 
of the discal ocellus, which is consequently very indistinct); this shade just 
crossing the antemedian and postmedian lines; lines not strong, except some- 
times their black costal extremities; weak distal shading, about as in normal 
forms. Hind wing violet-grey, the brown shading only developed in narrow 
bands or lines accompanying the median and postmedian; cell-dot wanting. 
Fore wing beneath suffused with violet-grey, but with a broader costal 
area above remaining brownish ochreous; markings indistinct or wanting. 
Hind wing remaining pale brownish ochreous, but more or less heavily irrorated 
with violet-grey; almost unmarked or with a strong antemedian line. 
Pretoria North, 13 March 1917 (C. J. Swierstra). Type S in coll. Transvaal 
Museum. Pretoria, 10 February 1917 (H. G. Breijer). Allotype in coll. L, B. 
Prout. 
A striking form, giving the impression of a separate species. I can, however, 
find no essential difference, unless it be in the well-developed abdominal 
spine ; this is undiscoverable in most of the ^ petronaria which I can examine, 
but must surely be present, as the tibial hair-pencil is so strong. 
55. Rhodophthitus atacta sp. nov. 
S, 39 mm. Similar to Nothahraxas commaculata Warr., differing as follows. 
Face without the horny process of Nothahraxas; predominantly pale 
ochreous, only at the sides fuscous. Palpus apparently rather shorter; less 
black-mixed proximally. Front of thorax more ochreous. 
Fore wing slightly less elongate, the termen being rather more rounded 
and a little less oblique; rather less glossy, the black parts less pure, being 
more tinged with purplish and in places dotted with white ; the black at costal 
margin rather more extended and more evenly distributed, but in the form 
of dots and irroration rather than well-defined spots; antemedian black band 
wanting in cell, a continuous longitudinal white band consequently running 
from base to subapical fascia; the latter narrow; nearly the entire hind -marginal 
