298 
PHIALA. By M. Gaede. 
devylderi. T. devylderi Aur. (43 e). Thorax dark brownish-grey. Wings greyish-yellow, powdered with brown 
and with similar bands on the fore wing, two broader ones being parallel, between them two narrow ones. Margin 
powdered with dark, especially on the hindwing very broad and rather distinctly defined. Abdomen orange- 
brown. 50 to 55 mm. South West Africa. 
15. Genus: l*hiala Wllgr. 
Palpi short. Antennae of y 2 the length of the costal margin, in the $ strongly pectinate, in the $ almost 
not pectinate. Fore tibiae and middle tibiae short, both at the end with a thorn, hind tibiae with 2 spurs. 
Forewing of normal width, costal margin moderately curved. Vein 5 below the upper angle. Veins 6 -j— 7 8 
-j- 9 + 10 stalked. Vein 10 may also be rare in single species or absent in most of them, and vein 6 may be 
unstalked and even rise entirely separated from 7. In the hindwing the same is the case with 5, veins 6 + 7 
on a long stalk, vein 8 anastomosing a little with the centre of the cell or connected with it by a bar. 
Evidently entirely allied species are placed by the different authors either to Phiala Wllgr. or to 
Stibolepis Btlr. ; we have combined the two groups here and begin with the species in which the antennal 
shaft is predominantly white, whereas the pectinations are ochreous. The second group of species exhibit 
dark, mostly black antennae. Most of the first group of species look like species of Spilosoma (Arctiids), the 
others partly like species of Boarmia (Geometrids). Type: costipuncta H.-Sch. 
I. Group: Antennae light, thorax mostly light brownish, abdomen orange- 
brown. 
a) costipuncta- group. Within the distal line without any marking, nearly all the species white, unless differently 
mentioned. 
costipuncta. P. costipuncta (H.-Sch.) (= atomaria Whr., xanthosoma Wllgr., punctilinea Wlcr.) (44 d). On the 
forewing a row of black dots from near the apex almost straight to % inner margin. On the hindwing a cur¬ 
ved distal row of dots being situate far beyond those of the forewing. Both may also be united forming a 
angola, fine line. 42 to 46 mm. Congo, South Africa. — angola Strd., almost without any marking, may occur every- 
ochritincta. where. — ochritincta Strd. resembles the typical form, but it is ochreous on both wings, finely dusted with black. 
Transvaal. Separable from yellow specimens of marshalli by the more oblique course of the row of dots on the 
fore wing. 
similis. P. similis Aur. Head and collar yellowish. Thorax white. The row of dots on the forewing as in costi¬ 
puncta. Those on the hindwing are situate farther inwards, so that they almost appear to be the continuation 
of the row on the forewing. 47 mm. Transvaal. 
marshalli. P. marshalli Aur. (41 i). Head and thorax sulphur-coloured. Forewing varying between sulphur- 
coloured and white. On the forewing the black dots are similarly arranged as in costipuncta. On the hindwing the 
row of dots is very near to the anal angle. Beneath yellowish-white, only at the costal margin ochreous. 
reussi. 35 to 42 mm. East Africa, Maslrona Land. — reussi Strd. is the form with pure white wings. East Africa. 
venusta. P. veiiusfa Wkr. (44 cl). Wings white, with an intense gloss. The band of the forewing begins at % 
inner margin with a black vertical streak followed by a fine row of dots parallel to the distal margin, not as 
far as the costal margin. On the hindwing the row of dots is similarly arranged as in marshalli. 45 to 55 mm. 
Sierra Leone, Cameroon. In a $ from Cameroon the band of the forewing extends to the costal margin. On 
the hindwing it is somewhat angular at the costal margin, the end at the anal angle is situate farther inwards: 
angulata. angulata /. nov. (47 e). 58 mm. Type in the Berlin Museum. 
crassistriga. P. crassistriga Strd. (= incurva Aur.) (44 d). Similar to a large wichgrafi. Wings pure white with 
few black scales. The black bands are very strong, those of the forewings centrally slightly concave, those of 
the hindwings straight, often broken up into spots. Strand may be right in presuming this to be a large form 
of costipuncta. 40 to 50 mm. East Africa, Nyassa District. 
flavina. P. flavina sp. n. (41 h). Head yellow, thorax brownish, abdomen orange brown. Wings slightly 
yellow. On the fore wing a black band similar to crassistriga, but in the centre distally bent with streaks on 
the veins. The black dots on the hindwing are very near to the distal margin. Beneath unicoloured ochreous 
brown. A 4:0 mm. Lganda. Type in the Tring Museum. 
wichgrafi. P. wichgrafi Strd. (41 i). Both wings slightly yellowish-white with a fine ochreous marginal line, 
densely dusted with black. As the transverse band ends somewhat farther inwards at the inner margin of the 
forewing, it is probably no form of costipuncta, but a separate species. Besides there are often near the distal 
margin traces of another band of densely arranged black scales. On the hindwing likewise a slightly curved 
band. $ 36 mm. Transvaal. 
niveociliata. P. niveociliata Strd. (41 h). Hair on thorax pure white. Band of forewing somewhat excurvrd formed 
of densely arranged black scales. Besides another feebler band near the distal margin. Interior area finely 
dusted with dark. On the hindwing often a curved outer band, particularly distinct near the costal margin. 
