62 
ERONIA. By Dr. C. Aurivillius. 
cleodora. 
erxia. 
dilatata. 
leda. 
cygnophila. 
trim mi. 
pharis. 
thalassina. 
verulana. 
sinalata. 
argia. 
semiflava. 
idotea. 
poppea. 
mixta. 
virescens. 
sulphurea. 
very considerably from the Indo-Malayan (Pareronia) in colour and shape. The ?? in most species are marked 
very differently from the cfcf. The species of Eronia have a powerful and very rapid flight and are hence 
difficult to catch except when they are met with drinking at flowers. 
E. cleodora. Both wings above white with a broad black marginal band, which is irregularly incised 
proximally; at the apex of the forewing the marginal band encloses two white spots; the forewing is also 
white beneath, but its marginal band at the apex grey and brown and only proximally pure black; the hindwing 
is beneath bright yellow with brown, grey-spotted marginal band and some brown discal spots, of which one 
at the middle of tlie costal margin is always present. The sexes are similar. — cleodora Him. (21b) is the 
dry-season form; it is smaller and the marginal band of the hindwing is only !—3 mm. broad, f. erxia Hew. 
(21b, c) has the marginal band on the hindwing 5—8 mm. in breadth and the underside of the hindwing is 
paler, f. dilatata Btlr. (21 e, f) is a large, extreme summer form, in which the marginal band of the hindwing 
is 10-12 mm. in breadth. — The species occurs in South Africa to Angola and in the whole of East Africa 
to Abyssinia. The larva has been found on Capparis zepheri and is green with red-yellow lateral line. 
E. leda Bdv. (21 e) strongly recalls Teracolus incretus in the cf, but is larger; the wings in the cf are 
above sulphur-yellow; the forewing has a large orange-yellow ornamental spot, which reaches the cell and is 
distally narrowly margined with black-brown; the underside of the hindwing and of the extreme apex of the 
forewing is more or less spotted with brown; in the ? the ornamental spot of the forewing is absent and 
is replaced by a broader black or brown marginal band, posteriorly broken up into spots, the ground-colour 
is either yellow as in the cf or white, ?-ab. cygnophila Suff. (15 c). During the dry season occurs a smaller 
form, f. trimeni Oberth., in which the dark markings on the forewing above are almost entirely absent and 
the underside of the hindwing is more spotted with brown. Distributed from Kaffirland to Abyssinia. 
E. pharis Bdv. (21c) differs from the other species in the more obtuse and rounded forewing; both 
wings with white ground-colour; the forewing above with narrow black apical band, which terminates at 
vein 3 or 4; hindwing above unicolorous without markings; forewing beneath white with a small brown 
subapical spot (cf) or a brownish marginal band (¥); hindwing beneath light yellowish, in the cf only with 
a black streak at the end of the cell and oblique brown streaks in cellules 5 and 6, in the ¥ with broad 
grey-brown marginal band. A rare species, only occurring in the great West African forest region, but 
distributed from Sierra Leone to Angola and Uganda. 
E. thalassina Bdv. (15 c, 21e) differs from all the other species in that the hindwing and the apex 
of the forewing have beneath a bright mother-of-pearl gloss; the forewing beneath without markings or only 
with small black marginal dots at the extremities of the veins and 1 or 2 black submarginal spots 
(in 3 and 5); the hind wing beneath without spot on the transverse vein of the cell, but often with 
small dark submarginal dots and yellow base to the costal margin; in the cf the wings above are 
a beautiful bluish white, the forewing has a broad black marginal band, irregularly incised proximally, 
which usually reaches the hinder angle, the hindwing is without markings or has usually black marginal dots 
at the extremities of the veins; in the type-form of the ? both wings are above white or whitish, in ¥-ab. 
verulana Ward the forewing is on both surfaces ochre-yellow to orange-yellow and the hindwing white, in 
¥-ab. sinalata Suff. (15c) the forewing is white but the hindwing ochre-yellow; in the ¥ the black marginal 
band of the forewing has usually 2 light spots before the apex. — Distributed from the Senegal to the 
Zambesi and British East Africa. 
E. argia is the largest of the African Pierids. It differs from the preceding species in the dull cream- 
yellow under surface of the hindwing without mother-of-pearl gloss and in the underside of the forewing, 
which has in the cf a large black subapical spot and in the ¥ a dark marginal band, hi the cf the wings 
are above slightly greenish or bluish white, the hindwing without markings and the forewing adorned with 
a black marginal band, proximally uniformly dentate at the veins. In the ¥ this marginal band is in cellules 
2 and 4 deeply incised or even broken up into spots and the hindwing has large marginal spots at the 
extremities of the veins. The ¥¥ occur moreover in many colour-aberrations. argia F. (21 c d) is the 
West African race; the cfcf have a broader marginal band on the forewing above, continuous to vein 2, and 
in the ¥¥ this marginal band is deep black, unspotted and continuous; in the main form of the ¥ both wings 
are white above to the base and the forewing also beneath without basal spot. West Africa from Sierra 
Leone to Angola and Uganda. ¥-ab. semiflava Auriv. has above orange-yellow forewing without basal spot 
and white hindwing. ¥-ab. idotea Bdv. (21 d); both wings above sulphur-yellow; the forewing without basal 
spot. ¥-ab. poppea Don. (21 d); both wings above white; the forewing with orange-yellow basal spot. ¥-ab. 
mixta Auriv.; the forewing above yellow with orange-yellow basal spot; the hindwing above white. ¥-ab. 
virescens Suff I; both wings above light greenish-yellow; the forewing above without, beneath with orange-yellow 
basal spot; Togo. In ¥-ab. sulphurea Auriv. both wings above are sulphur-yellow; the forewing with orange-yellow 
