134 
SYNO C4D0 A; STRACENA; STRACILLA; CROPERA. By Dr. M. Herixg. 
hololevca. 
usebia. 
atripalpia. 
plumosa. 
siderea. 
simplex. 
fuscivena. 
promelaena. 
intermedia. 
pellucida. 
translucida. 
P. hololeuca Hmps. Very similar to usebia (20 c), but the tibiae and tarsi are black-striped. Forewing: 
veins 10 and 11 fused. Expanse 34 mm. Uganda. 
P. usebia Swh. (= usebria Janse) (20 c). Wings purely white, as well as body, but irons and legs 
ochreous-yellow. Vertex white. In the forewing vein 6 from the cell-angle. Expanse 34 mm. South and 
East Africa. 
P. atripalpia Hmps. Body white, palpi above black. Tibiae black-striped, tarsi black. Abdomen 
beneath ochreous-yellow, forewing tinted with ochreous-yellow, otherwise white, hindwing white. Expanse 
3S mm. Abyssinia. 
P. plumosa Hmps. Similar to atripalpia, but vertex orange, vein 6 of forewing separated from the 
stalk of 7 to 9. Mashonaland. 
P. siderea sp. n. (28 d). Similar to usebia (20 c), but the antennae with reddish-yellow pinnae, head 
lighter orange, forewing somewhat more greenish-white, with a very intense gloss, also the hindwing with a 
gloss. Costal margin of forewing beneath orange-yellow. $ type from Nairobi in the Tring Museum. 
13. Genus: Syiiogtloa Auriv. 
Hind tibiae with 1 pair of spurs, forewing without accessory cell, vein 10 forked with 7 to 9, rising before 7. 
In the hindwing vein 8 for a long distance fused with the anterior edge of the cell, 6 + 7 forked. But 1 species: 
S. simplex Auriv. is very similar to the $ of Stracena fuscivena (20 c). Pale dingy yellowish, forewing 
semi-transparent, costal margin brownish, at the cell-end a black dot. Expanse 47 mm. Cameroon. 
14. Genus: Stracena Swh. 
Eorewing without accessory cell, vein 10 from the stalk of 8 + 9 + 7, rising before 7. The two sides 
of the cell-end form a right or acute angle. In the hindwing vein 8 is not connected for a long distance with 
the anterior edge of the cell, 6 and 7 rise from the same place. Hind tibiae only with 1 pair of spurs. 
Hitherto only known from Africa. 
S. fuscivena Swh. (20c, 21a). $. Body dingy white, head, tegulae, and chest ochreous-yellow; 
antennae, palpi, and the greatest part of the legs black. Forewing greyish-hyaline, veins darker brown; hindwing 
whitish hyaline, veins at the end brown. The 3 is white according to Aurivilliits, with a red-brown costal 
margin of the forewing as far as % and a blackish spot at the cell-end; the body is red-brown. -— Larva 
green, flattened down. Head in front between the antennae with an up-bent, inflated appendage, recalling 
the palpi. Pupa bare, with an intense gloss, variegated as the pupa- of a butterfly, white with small black and 
large orange spots. Nigeria, Cameroon. 
S. promelaena Holl. (20 c) is similar to fuscivena, hindwing white with a black marginal band. Togo 
to Angola. — In the form intermedia Auriv. the dark marginal band of the hindwing is absent, the veins are 
in the forewing lighter, more brownish. Bred with the nominate form from the pupa. The latter is larger 
than that of fuscivena and exhibits on the ventrum on the segments 5 and 6 one roundish spot each, surrounded 
by black. 
S. pellucida Griinb. (20 d). Body yellow, tips of palpi, antennae, and legs black. Wings hyaline 
ochreous-yellow, forewing often in the distal third (except the extreme margin), in the cell, and behind the 
cross-vein darkened with brown. East Africa. 
15. Genus: §traeilla Auriv. 
Distinguished from Stracena by veins 6 and 7 of hindwing being distantly separated and therefore 
almost parallel. $ with projecting terebrae. Only 1 species is known. 
S. translucida Oberth. (20 d). White, antennae, and part of legs black, wings all white, hyaline. 
Abyssinia, Kilima Njaro, Congo. 
16. Genus: Cropera Wkr. 
Eorewing with accessory cell, vein 10 from the latter, 7 often forked with 8 + 9, rising before the 
middle or at the bottom of the stalk. In the hindwing vein 4 is nearer to 5 than to 3, veins 6 and 7 
rise together or separately. Palpi short. Hind tibiae with middle and terminal spurs. The genus is hitherto 
only known from the Ethiopian Region. 
