PHIALA. By M. Gaede. 
arrecta. 
incana. 
'punctulata. 
alba. 
difficilis. 
sirigifera. 
atomaria. 
pseudato- 
maria. 
sublimbalis. 
bamenda. 
subochracea. 
hologram¬ 
ma. 
subirides- 
cens. 
infuscata. 
; postmedia- 
Us. 
novemlinea- 
ta. 
300 
c) a^a-group. 
Mostly white, occasionally also brownish species with almost vertical bands. Those species that are 
more intensely marked recall Boarmia- species. 
P. arrecta Dist. (44 e). Head orange, thorax almost white. The white forewing is finely powdered 
with black. A distal band of black scales from % inner margin vertically forward, slightly excurved behind 
the cell. At the centre of the costal margin traces of the median band. Hindwing with a few black scales at 
most, without a real band. 40—45 mm. Transvaal. 
P. incana Dist. was only obtained once by the author. According to the figure it is presumably only 
an aberrative arrecta without any bands at all. 45 mm. Transvaal. 
P. punctulata Pagst. ( = nyassana Strd.) (41 h). Described according to the specimens in the Berlin 
Museum having been identified by Strand. Thorax and forewing yellowish-white, with bands of black scales 
arranged in the apical end as in arrecta , but extending from there rectilinearly to the inner margin. The indistinct 
median band at the costal margin as in arrecta, besides a basal band. On the hindwing an extinct band running 
to the anal angle. Sometimes also a median band as on the forewing. 45 to 50 mm. Nyassa District. 
P. alba Aur. (= pagana Strd.) (44 f). Wings milky white. Hindwing at the anal margin slightly 
oclireous. Typical alba has but few black dots from % inner margin rectilinearly, somewhat obliquely distad 
to the costal margin. — In difficilis Strd. the band of blackish-brown spots is much more distinct. — In 
strigifera Strd. (44 f) it is very intense and, besides, there are traces of an undulating line before the distal margin. 
(pagana was a large $ without markings). 
P. atomaria Holt. Head reddish, thorax grey. Wings pale grey, densely powdered with dark. Transverse 
lines only recognisable at the costal margin of the forewing, especially at the base. Distal margin dark grey 
fringe ashy grey. Hindwing not specially described. On the under surface behind the cell traces of bands as 
in pseudatomaria. Owing to the dark distal margin it may also have been a bad specimen cf infuscata. <$ 55 mm. 
East Africa. 
P. pseudatomaria Strd. (45 a). The proximal and median lines on the forewing vertical to the inner 
margin, both intro-angular close below the costal margin, double, the averted branches often feebler. Distal 
line single, somewhat incurved behind the cell, the most distinct of all. Behind it a feeble undulate lme. On 
the hindwing the median line is double, uniformly curved, behind it the distal line is somewhat stronger. 50 mm. 
East Africa. — sublimbalis Strd. (44 f) having been described as a form of postmedialis probably belongs 
to this species. The distal line is more prominent in both wings, the others are situate as in pseudatomaria-<$, 
as far as they are recognisable. It may be the normal $ of it. $ 60 mm. East Africa. 
P. bamenda Strd.. according to the author, is characterised by the antennae of the $ being very 
distinctly pectinate, though this also occurs for instance in alba. Otherwise the species is similar to pseudatomaria, 
but behind the double proximal line follows another one. The others are only distinct at the costal margin. 
On the hindwing all the lines are absent. 58 mm. Cameroon. 
P. subochracea Strd. (44 d). The double proximal line on the forewing is straight, extending somewhat 
obliquely distad. Also the distal line is rectilinearly undulated and very distinct. The median and marginal 
lines are very indistinct. On the yellowish hindwing there are traces of a distal line. 65 mm. East Africa. 
P. hologramma Aur. (44 e). Similar to subochracea, but the lines are much more distinct, the ground 
intensely dusted with dark. Distal line somewhat excurved between veins 4 and 2. The shape of the marginal 
line rs apparently the same as in subochracea. On the hindwing a double median line and 3 curved undulating 
lines. 48 to 55 mm. East Africa, Uganda. 
P. subiridescens Holl. is perhaps allied to hologramma. Not recognisable from the description and 
figure. 
P. infuscata Grunbg. (44 e). The double proximal line as in subochracea, but behind it another parallel 
stronger line extending from the median vein near the somewhat curved median line. Between them intensely 
powdered with brown. The distal line lias a shape like that of postmedialis, distally edged with light, behind 
it darkened as in the median area. The light marginal line therein distinct. On the hindwing the distal line 
is also edged with light, rather straight. Behind it broadly dark. $ 55 mm. East Africa. 
P. postmedialis Strd. (44 e). Coloured like pseudatomaria. The 3 proximal lines are rather uniformly 
excurved. The double median line is incurved at vein 2. Distal line very strong. Marginal line hardly indicated. 
On the hindwing only the distal line is present. $ 60 mm. East Africa. 
P. novemlineata Aur. (47 e). Ground-colour whitish oclrreous. Distal line as distinct as rn the two 
preceding species. Near the base of the forewing 3 or 4 straight, blackish, vertical lines. Median line similar 
