IOLAUS. By Dr. C. Aukiyillius. 
391 
§. Legs uni-coloured white or only along the outside darkened or blackish. 
Second Group. 
§§. Tibiae and tarsi white with distinctly prominent black spots or rings. — forewing 
with 11 veins and a black hair-pencil at the anal margin. Third Group. 
**. Frons at least above orange-red or orange-yellow, or white with orange-red markings; sometimes 
orange-red with a white median line. 
o. Forewing beneath at the end of the discal cell unmarked or only with a fine blackish trans¬ 
verse line. Fourth Group. 
oo. Forewing beneath at the end of the discal cell with a thick transverse streak. — £ forewing 
only with 11 veins. 
|. Frons not uni-coloured. Legs not quite black. Palpi not yellowish at the base. Wings 
beneath with a grey or whitish ground-colour. •— £ forewing beneath at the anal margin 
with a mealy spot and black hair-pencil. Hindwing above with a dark mealy spot not 
or scarcely projecting beyond the apex of the discal ceil. Fifth Group. 
ft. Frons uni-coloured ochreous-yellow. Legs black, below at the base yellowish. Palpi 
at the base yellowish. Wings beneath with a yellow ground-colour. — $ without any 
mealy spots and hair-pencil. Eighth Group. 
[3. Forewing beneath at the apex of the discal cell with a large, square, blackish spot. — $ forewing 
with 11 veins and a black hair-pencil. Sixth Group. 
B. Forewing beneath near the base with a transverse spot or a transverse band situate before the middle 
of the cell. -— forewing with 11 veins and a black hair-pencil at the anal margin. Seventh Group. 
II. Frons broad, uni-coloured white. Palpi as far as the tips white, or towards the tips only slightly darkened, 
grey or brownish. — forewing with only 11 veins. Ninth Group. 
First Group of Species. 
The two large species of this group approximate those of the following group, but they differ from all 
the others by the long, broad, white small tails at the anal angle of the hindwings. Druce established for them 
the genus Tarmetheira which, however, only deviates from Argiolaus by the small tail. As the two species are 
otherwise very closely allied with many other species in the colour and marking, I rather consider them to 
be a group of the genus Iolaus. Legs white, along the outside black or blackish. In all the specimens of I. timon 
which I examined vein 8 of the forewing is absent and vein 7 terminates into the costal margin near the apex 
of the wing. 
I. timon F. (67 d). <$. Wings above jet-black; forewing at the base as far as vein 3 and at the anal 
margin as far as beyond the middle of vein 1 of a beautiful light greenish-blue; the blue colour only covers the 
innermost part of area 2 and then extends slantingly and almost straightly towards the anal margin, where 
it ends taperingly; lobe of the anal margin rather small, white-haired; hindwing in the areas 1 a and 1 b grey, 
in 1 c to 3 almost as far as the border, at the anal margin of the discal cell and in the basal part of area 4 
light blue like the forewings; mealy spot small, brown, surrounded by a lustrous grey area covering the 
greatest part of the discal cell. Forewing beneath uni-coloured white without markings. Hindwing beneath 
as far as beyond the middle unmarked, white; behind the middle with a fine black postcliscal line growing less 
distinct anteriorly, and with 2 black sub marginal dots proximally broadly bordered with red, in 1 b and 2; 
the red borders of these dots are connected in 1 c by a red transverse streak which often touches the postdiscal 
line; marginal line distinctly black, fringes white. The $ deviates above by the blue colour of the forewing 
being somewhat more extended, covering the base of area 3, and by the same colour on the hindwing termina¬ 
ting in 1 c to 3 about 6 mm distant from the margin; the black marginal band arising thereby is decorated 
with white submarginal and marginal spots; beneath both wings show two distinct submarginal lines, the red 
and black spots of the areas 1 b to 2 are strewn with blue scales. Sierra Leone to Cameroon. 
I. prometheus H. H. Drc. is unknown to me and is said to differ from timon only by the $ forewing 
showing above in the middle a large lustrous bronze-brown spot and the mealy spot of the hindwing being 
larger; the $ is said scarcely^ to differ from that of timon. Sierra Leone and Unyoro. 
Second Group of Species. 
These species deviate from the others by the frons being along the middle black, laterally white, and 
by the white, not black-curled or spotted tibiae being striped dull black at most on the outside. 
Union . 
promctheu 
