ERESINA; ARGYROCHEILA. By Dr. C. Aurivillius. 
341 
is 5 mm distant from the apex of the wing; this anterior apex is defined as a trapezoidal or almost rectangular 
spot which, however, coheres with the other yellow area; posteriorly the latter area continuously extends to 
the median vein of the hindwing; farther behind there are single, yellow dots at the veins; fringes black with 
5 yellow spots on the hindwings and 5 or 6 much smaller ones on the forewings; at the costal margin of the 
forewing 1 or 2 yellow punctiform spots. Wings beneath orange-yellow; forewing with 6 or 7 black, oblicpie, 
irregular costal-marginal stripes, the distal one of which is posteriorly prolonged as narrow as a line, whilst 
the penultimate reaches vein 3 and is twice as long and broader than the preceding stripes; margin narrowly 
black. Hindwing beneath with a submarginal line formed of narrow, coherent moon-spots, a submedian trans¬ 
verse band being outside in the middle strongly expanded, and 2 or 3 narrower bands in the basal half black; 
the black colour, however, strongly mixed with leaden-grey scales. Expanse of wings: 25 mm. Usambara. 
15. Genus: Eresina Auriv. 
Antennae moderately long with a distinct, oval, compressed club. Palpi scaled and bristly-haired, 
projecting beyond the forehead. Legs short; posterior tibiae faintly curved, thickened and somewhat com¬ 
pressed. Forewing only with 11 veins (vein 7 is absent); vein 6 rises behind the middle of the long footstalk 
of 8 and 9, and vein 10 either from the same footstalk near the cell-apex or from this apex itself, and vein 
11 from the costal margin of the cell. Veins 6 and 7 of the hindwing on a long footstalk. 
The species are small and resemble either Pseuderesia- or Liptena- species. 
Review of the Species. 
I. Wings undulately margined, of a black ground-colour and with an orange-yellow costal-marginal stripe 
on the hindwing above. E. corynetes. 
II. Wings completely margined, of an orange-yellow ground-colour. E. gerda. 
E. corynetes Smith & Ky. (64 b). E- Forewing above black without markings, beneath black, at corynetes. 
the margin tinted yellowish with black moon-spots close in front of the margin. Hindwing above black with 
an orange-yellow costal-marginal stripe covering the anterior half of the discal cell and almost reaching vein 4, 
but ending before the apex of the wing; beneath blackish-grey at the base and in the middle spotted ferruginous, 
and at the margin with two transverse lines of black moon-spots. The 2 differs by the forewing showing an 
orange-yellow discal band being broad at the posterior margin, anteriorly narrowed and ending at vein 6. Niger 
to Cameroon. 
E. gerda Ky. (62 i). Wings above orange-yellow, at the margin somewhat darker; forewing with gerda. 
a small, black apical spot reaching vein 4, a small, dark median dot and small discal dots in 4, 5 and 9. Wings 
beneath brownish-yellow, at the posterior margin of the forewing lighter, with two, dark antemarginal lines 
formed of small lunae, and some dark discal dots and striae. Cameroon. •— unicolor Auriv. only deviates by unicolor. 
the dark apical spot on the forewing above being entirely or almost entirely absent, and the hindwing bemg 
much lighter, sulphureous-yellow beneath. Kuilu River. 
16. Genus: Argyroohella Stgr. 
This genus is founded upon one of the most delicate and most peculiar day-butterflies. In the structure 
of the veins it only differs from Eresina by vein 8 of the forewing being present, though extremely small. The 
forewing is strongly lobated at the ends of the veins 4 to 7, and the margin is most prominent at vein 4. Hind- 
wings faintly undulately margined. 
A. undifera Stgr. (64 b). Wings semi-transparent, white with some small brown dots or striae at undifera. 
the margin and costal margin of the forewing, and with a dark dot in area 4 of the hindwing; fringes speckled 
brown. vSierra Leone to the Ogowe River. 
