LEPTOSIA; HERPyENIA. By Dr. C. Aurivtllius. 
31 
2. Genus: B^eptosia Hbn. 
Medium-sized, or small, delicately built butterflies. Wings broadly rounded, with white ground-colour. 
The earlier stages of the Ethiopian species are unknown. The genus also occurs in South Asia and is there dis¬ 
tributed as far as the Philippines and Formosa. Fly in woods or at their edges and prefer shady places to 
sunshine. Sexes similar. 
L. medusa. Wings white, the forewing above with black apical bands, which usually extend from vein 
4 to vein 10. Beneath the apex and base of the foreAving and the whole hindwing are more or less densely 
sprinkled with fine greenish short bars. Both wings beneath with minute black dots at the extremities of the inter- 
neural folds. Expanse 48 —60 mm. —- medusa (Jr. (10 a). ForeAving on both surfaces Avith a large black spot at medusa. 
the middle of cellule 3; hindwing above unicolorous or with black spots at the extremities of the veins. Distri¬ 
buted from Sierra Leone to the Congo district and Uganda. — ab. immaculata Auriv. (10 a). Forewing without immaculata. 
submarginal spot in cellule 3; hindwing always without dark marginal spots. Together with the type form. — 
ab. marginea Mab. has the hindAving above with broad black marginal bands, otherAvise marked like the type marginea. 
form. 
L. alcesta. Similar to the preceding species, but smaller, only 29—43 mm; hindwitig above always 
unicolorous white; the dark short bars on the underside of the forewing are scarcely greenish and less numerous; 
on the hindAving they usually form only 1 —2 fine transverse lines. Distributed from Sierra Leone to Natal, Bri¬ 
tish East Africa, and Uganda; occurs also on Madagascar. — The first known form, alcesta Cr. (10 a), has on the alcesta. 
fore whig a black apical band placed between veins 5 and 8, and a black submarginal spot, which is usually 
divided by vein 4. — In narica F. (10 b) the marginal band of the forewing is entirely absent, but the sub- narica. 
marginal spot is Avell developed. — nuptilla Auriv. (10 b). The marginal band of the forewing present, though nuptilla. 
somewhat narrower than in alcesta , but the submarginal spot entirely absent. Hitherto only knoAvn from theRu- 
wenzori Mts. — nupta Btlr. (10 b). The forewing also unicolorous white without dark markings. nupta. 
3. Genus: Herpaenia Btlr. 
This genus, which is peculiar to the Ethiopian fauna, differs from the other genera of Pierinae not 
only in the characters given in the summary, but also in its special pattern. Both in this and in its habits it 
approaches the species of the genus Teracohis. 
The butterflies fly in the sunshine in open places and shun the shade of the woods; they have a slow 
flight and commonly rest on floAvers. The earlier stages are unknown. 
H. eriphia. Wings above black Avith yelloAv ($), whitish yellow (<J) or white markings; forewing with 
the folioAving light markings: a longitudinal streak at the costal margin from the base to beyond the middle 
and behind the cell Avidened. into a transverse band composed of three spots in cellules 8, 5 and 4; an obliquely 
placed distal band, almost parallel with the costal margin, which begins at the hindmargin before the middle 
and is composed of three spots (in cellules la, lb and 2); four to five submarginal spots (in lb, 3, 5, 6 and 
sometimes 8), of which the one in cellule 3 is always the largest and that in cellule 5 the smallest; the spot 
in lb is placed close to the distal margin and is usually united with it. The hindwing has above tAvo parallel 
light transverse bands, one before and one behind the middle, and three to six light marginal spots, of which 
the one in cellule 6 is always the largest. The under surface is similarly marked, but has always a broad 
light longitudinal streak in the middle cell of the foreAving and dark brown instead of black ground¬ 
colour. The species occurs from Senegal to Nubia, in East Africa, in South Africa as far as Angola, and on Ma- 
dagascar, but is wanting in the West Africanyregion. Four local races, each of which has tAvo seasonal forms, 
have been discribed. — eriphia Godt. (10 c). ForeAving above without light streak in the middle cell and with eriphia. 
continuous discal band; the light markings more or less yelloAvish; hindAving beneath not streaked, but with 
distinct marginal spots. Senegal, South Africa and parts of East Africa, f. nyassae Lanz (10b) is the dry- nyassae. 
season form of eriphia ; the light markings of the upper surface more yellowish; marginal spots on the upperside 
of the hindAving larger; hindwing beneath more or less densely covered with small broAAm or reddish streaks, 
sometimes so densely that the transverse bands become indistinct and the marginal spots are entirely sup¬ 
pressed. Especially in dry districts of South Africa. — iterata Btlr. The black markings of the upper sur- iterata. 
face somewhat more extended and the discal spot in cellule 2 rounded and separated from the band; other¬ 
wise agreeing almost entirely Avith eriphia. German and British East Africa and in Somaliland, f. melanarge melanarge. 
Btlr. (22 g) is the dry-season form of iterata ; the dark markings on the underside of the hindAving bright red- 
broAvn. In the same districts as iterata. — lacteipennis Btlr. (10 b, c) differs in having the light, yelloAvish mark- lacteipennis. 
ings more extended, in its smaller size and especially in a light longitudinal stripe in the middle cell of 
the forewing above. Abyssinia and Nubia, f. straminea Auriv. (22 g) is the dry-season form of straminea. 
lacteipennis and is distinguished by the reddish-suffused under surface of the hindwing. Nubia. — 
