168 
DIESTOGYNA. By Dr. C. Aurivillius. 
this and the apex of the cell; in the cell of the forewing the usual dark transverse markings; the first 
of the dark transverse bands of the forewing is sometimes indistinct posteriorly; the under surface is similar 
to that of plagiata , but differs in having a sharply marked black spot in cellule 4 of the hindwing, as in 
schultzei <$. According to Karsch the $ has a white oblique band on the forewing and like the $ a dark spot 
in cellule 4 on the underside of the hindwing. Old Calabar and Gameroons. 
excelsior. D„ excelsior Reb. is a beautiful species quite recently described, which seems to belong in the vicinity 
of amicia. In the $ the wings have the ground-colour above bright red-yellow with the usual black transverse 
bands on both wings standing out sharply; the basal part of both wings is dark brown; the under surface is much 
paler and more washed-out, the forewing dull red-yellow with the dark markings of the upperside much 
paler, only the row of spots before the distal margin stands out more distinctly and has a white dot basally 
in each cellule from 4—6; the under surface of the hindwing is likewise dull red-yellow in the basal area and 
shows a small, round black spot with a white centre in the cell and a larger blackish spot beyond the disco- 
cellular (in cellule 4); two red-brown, not sharply defined transverse bands cross the middle of the wing; the 
distal band is marked with white dots at the inner side. The $ is considerably larger than the J and the 
whole apical part of the forewing is black above, with a pure white transverse band; the rest of the upper 
surface is coloured like that of the <$; the underside of the forewing is also much darkened in the $, with 
whitish grey transverse stripes in the cell; the hinclwing beneath darker than in the strongly mixed with 
rust-grey, only towards the anal angle dull red-yellow with similar markings to the A but more distinct. 
Discovered by Grauer in the primeval forests on the north-western shore of Lake Tanganyika at an elevation 
of about 2000 m. 
mclanops. D. melanops Auriv. = unopunctata Baker) (37 e) is easy to distinguish in both sexes from all other 
species by the large round black spot in the cell of the hindwing beneath, but is otherwise nearly allied to the 
preceding species. The <$, which was described by Baker as a separate species, is above similar to that 
oily sandra , but somewhat lighter, and beneath agrees fairly well with the $, which is figured here. In the $ the 
hindwing and the basal half of the forewing have a brown, and the apical half of the forewing a black ground¬ 
colour; the cell of the forewing encloses a black ring and the oblique band is pure white, of almost uniform 
breadth as far as vein 3 and with a small, nearly pure white spot in cellule 2; both wings have a distinct black 
submarginal line and the hindwing indistinct postdiscal dots; the whole under surface is dark violet-grey with 
indistinct markings; the basal area of the hindwing is of the usual shape, but is very indistinctly defined; 
no dark spot in cellule 4. Congo: Bena-Bendi and Mawamba. 
D. doriclea differs from the other species in the shape and extent of the basal area of the hindwing 
beneath; this is nearly twice as long as broad and posteriorly almost reaches the middle of vein 2, while 
distally it is bounded by a thick, nearly straight black-brown band and forms a sharp point on vein 2. In the 
$ the upperside of the wings is lighter or darker umber-brown with three black transverse spots at the costal 
margin of the forewing and two more or less distinct rows of spots or transverse lines before the distal margin; 
beneath the forewing is yellowish with a black-brown transverse spot in the cell and a large one at the middle 
of the costal margin; the hindwing beneath is lighter at the costal margin and towards the anal angle gra¬ 
dually darker; it has always a dark spot in the cell. In the $ the hindwing and the basal part of the forewing 
are yellow-brown above, with the usual dark markings in the cell of the forewing and two curved rows of black 
streaks beyond the middle of the hindwing; the latter is broadly darkened at the distal margin; the apical half 
of the forewing is black-brown and encloses the white oblique band; this is rather broad and is basally broadly 
margined with black beneath also; the under surface is yellowish with a large black-brown spot in the cell 
doriclea. of the forewing. — doriclea Drury is the northern race, occurring in Sierra Leone to Dahomey, and only 
lysandra. differs from lysandra in the darker colour and more indistinct markings. —- lysandra Stoll (37 c) is lighter and 
differs from the following form in having the dark boundary-line of the basal area of the hindwing much 
thickened towards the costal margin and the spot in the cell of the hindwing unicolorous. Old Calabar 
inf asm. and Cameroons. — infusca Capronn. only differs in having the dark boundary-line of the basal area of the hind¬ 
wing much thinner and but little thickened towards the costal margin and in the spot in the cell of the 
hindwing having a light centre. Occurs in the Cameroons as an aberration and in the Congo as a separate species. 
T h i r d S u b g r o u p. 
In the 9$ of this subgroup the light oblique band of the forewing, which distinguishes the $9 of the two preceding 
subgroups, is entirely absent. Instead of it the forewing has several light yellow transverse lines or rows of spots, direct¬ 
ed vertically towards the hindmargin. 
mtermixta. D. intermixta Auriv. (39 e). Only the $ is known. This is quite aberrant in the markings, especially 
on the upperside of the forewing, and has some points in common with the $$ of the first group, from 
which, however, the species differs entirely in the shape of the basal area of the hindwing; both wings 
black-brown above, with yellow markings; the forewing with 5 yellowish transverse streaks in the cell 
and two abbreviated yellow transverse stripes starting from the hindmargin and running parallel Avith 
the distal margin, the first placed near to the base and terminating at the proximal end of cellule 
2 and the second commencing at the middle of the hindmargin and nearly reaching vein 4; the post¬ 
discal spots are ringed with yellow and the submarginal line is thick and black; the white subapical dots 
