30 
ORNA. By M. Gaede. 
wallengreni. 
hoitentoia. 
af finis. 
caffra. 
mcterythra. 
pagana. 
lateralis. 
agria. 
conjuncla. 
coniraria. 
zyqaenoi- 
des. 
pcctinicor- 
nis. 
subdiapha- 
na. 
posirosea. 
hyalina. 
ntbulosa. 
N. wallengreni Ky. (= concinna Wllgr.) (2 c) is very similar to the preceding, much larger. Well 
discernible by the great diminution of the hyaline parts on the hindwing, whereby it resembles the red caffra 
and af finis. Expanse 28 mm. Transvaal, Natal. 
N. hotlentofa H.-Schdff. (2 c). Forewing with 4 very small blackish-red spots, the 2 distal ones 
sometimes whitish. Hindwing at the base not hyaline, the black margin projects inwards in the hindmarginal 
fold. Expanse 22 mm. Natal. Easily recognized by the small spots. 
N. affinis Jord. (2 d). The 4 spots on the forewing are larger, mostly edged with white, and besides 
there is 1 round basal spot. Hindwing somewhat hyaline at the base. Legs and abdomen beneath yellowish 
white. Expanse 24 to 30 mm. South Africa. 
N. caffra L. (2 c). Similar to affinis. The basal spot on the forewing is extended into a fine streak. 
At the base of the hindwing mostly also the hind-margin is hyaline. Abdomen beneath blackish. Expanse 
24 to 36 mm. South Africa. 
N. meterythra Hmps. (2 d). On the forewing the 5 red spots are very small. Hindwing orange-red, 
distal margin narrowly black, hind-margin dark. Abdomen beneath orange-yellow. Expanse 28 mm. Natal. 
N. pagana Ky. (= caffra Cr.) (2d). Forewing with 5 red spots, somewhat larger than in caffra. 
Hindwing at the base not hyaline. Easily recognized by the very broad black margin of the hindwing. South 
Africa. 
N. lateralis Jord. Forewing with a violet gloss, with 5 yellow spots, of which the one at the base is 
the largest. Hindwing red, hyaline, distal margin narrowly black. Abdomen black, on the sides with confluent 
red spots. Expanse 26 mm. Natal. 
N. agria Dist. (= muraena Drc.) (2 d). Similar to lateralis. At the base before the large spot another 
yellow streak at the costal margin. Hindwing not hyaline, distal margin at the apex broader black. Abdomen 
above and laterally quite red. Expanse 22 mm. Natal, Transvaal. 
N. conjuncta Hmps. Forewing black with large yellow spots. A basal spot separated from the middle 
spot by a curved bluish-black line. The middle spot is conically prolonged to the anal angle and connected 
with a spot at the cross-vein, the latter spot again connected with a subterminal one. Abdomen black, on the 
second segment spotted yellow. Hindwing pinkish-red with a black dot at the upper cell-angle. Margin narrowly 
black. Expanse 30 mm. South Africa. 
3. Genus: Onsa Ky. (Euctenia Fldr.). 
Neuration as in Zygaena. Antennas of pectinate. Hind tibiae with 1 pair of spurs. Type: zygae- 
noides Fldr. 
0. confraria Wkr. (2 d). Black. Forewing with yellowish-white spots. A triangular basal spot, two 
oblique spots often confluent, and 2 marginal spots, the lower of which is small. Hindwing red, at the apex 
broadly black and at the distal margin, but not at the hind-margin. Expanse 24 to 28 mm. Natal. 
0. zygaenoides Fldr. (2 d) resembles coniraria. The median spots are smaller, fused. Hindwing also 
at the hind-margin black. Collar and a ring on the abdomen red. Expanse 22 to 28 mm. Natal. 
Probably identical with one of the two preceding species is: 
0. pectinicornis Schauf. Forewing likewise similar. Hindwing with an undulate black margin. Abdomen 
above red, beneath pale. Expanse 22 mm. Natal. 
0. subdiaphana Fldr. (2 d). Proximal area of forewing hyaline with 2 blackish-brown spots, distal 
area blackish-brown, diaphanous with 2 hyaline spots. Hindwing whitish hyaline with a black margin. Expanse 
32 mm. Cape Colony. 
0. postrosea Hmps. Forewing in the centre thinly scaled, proximad dingy white, distally brownish. 
A triangular brown spot from the base to the distal area, its apex below the cell. Below the submedian fold 
a large black streak. At the base of the cell orange. Hindwing pinkish-red, costal margin white, distal margin 
black. Expanse 28 to 30 mm. Cape Colony. 
0. hyalina Hmps. Forewing thinly scaled, pale brown, costal margin blackish-brown. Faded white 
spots below the cell at the base and on the centre. Hindwing brownish white. Abdomen yellowish-brown. 
Expanse 28 mm. Natal. 
0. nebulosa Guer. (2 e). Very hyaline. Forewing pale brown, hindwing almost white. Thorax brown, 
abdomen yellowish-white. Expanse 22 to 28 mm. Natal. 
