162 
DIESTOGYNA. By Dr. C. Attrivillius. 
grosesmithi. D. grosesmithi Stgr. (39 c) differs from all other species in the beautifully marked under surface: 
ground-colour on both wings deep red-brown, in the $ somewhat lighter, changing into yellow-brown at the 
inner margin of the forewing; the oval postdiscal spots are ringed with blackish grey and in cellules 4-—6 proxi- 
mally bordered by sharply marked Avhite dots; the cell of the forewing has 2 or 3 grey transverse streaks (filled 
in with brown) and beyond the apex of the cell is placed a broad grey spot; the.hindwing has a white-grey longi¬ 
tudinal stripe, more or less interrupted by dark transverse streaks, extending from the base through the cell 
and cellule 6 to the apex and enclosing a black dot in the cell; the species may be known at once by this stripe; 
the basal area of the hindwing is distally bounded by an irregularly curved and somewhat dentate brown 
line, which is not very distinct but usually margined with grey. Above the wings are black-brown in the 
with dark blue reflection but without dark transverse bands; the fore wing has a white dot at the middle of the 
costal margin and four very distinct white subapical dots; in the $ the ground-colour of the upper surface is 
tawny, in the apical part of the forewing somewhat darker, hence the dark transverse markings stand out rather 
distinctly; the transverse band of the forewing is continuous, posteriorly somewhat broader, anteriorly light 
yellow, posteriorly white; the white subapical dots are distinct. Cameroons. 
aridatha. D. aridatha Hew. (39 c) is best distinguished by the unusual shape of the basal area on the hindwing 
beneath; this is small and anteriorly to posteriorly very short, as its posterior side runs from the base of vein 3 
in a nearly straight line and parallel with the costal margin towards the inner margin; hence the entire area 
is almost quadrate. In the the wings are black-brown above with a slight blue reflection; the hindwing is lighter 
towards the costal margin, hence the postdiscal spots are here visible; the forewing is also somewhat lighter at 
the costal margin, so that the dark transverse bands and transverse spots become visible; it has 2—4 white 
subapical dots; beneath the forewing is yellowish with 5 or 6 red-brown transverse bands at the costal margin, 
which become indistinct posteriorly; the basal area of the hindwing is deep chestnut-brown with yellowish 
spots in 6—8 and a brown dot ringed with black and yellow in the cell; on the posterior side it is broadly 
margined with whitish grey; the rest of the hindwing is red-brown, at the anal angle very broadly suffused 
with whitish grey, a blackish dot in the basal part of cellules 4 and 5 adjoins the distal side of the basal 
area. The $ very closely approaches the <$ beneath, but is lighter and has on the hindwing white instead 
of yellow spots in the basal area and distinct postdiscal spots; the transverse band of the forewing is yellow 
above, white beneath, continuous, but in cellule 2 somewhat narrower than in cellule 3. Old Calabar and Came¬ 
roons. 
abasa. D. abasa Hew. (39 b). In the $ the wings are black-brown above, with very distinct black transverse 
bands but almost entirely without blue reflection; the fringes are dark and the white subapical dots of 
the forewing are indistinct or absent ; the under surface recalls the preceding species, but is somewhat lighter 
and has the basal area of the hindwing of a different shape, more rounded; forewing beneath yellow with two 
red-brown, dark-bordered transverse spots in the cell, a brown, nebulous band beyond the middle, widened 
at the costal margin, a nearly straight row of dark brown eye-spots and a dark marginal band; the basal area 
of the hindwing is reddish brown, scarcely darker than the distal part, and marked with some yellow spots, 
of which the one in the cell encloses a black dot; the distal part is darkened in cellule 4 close to the basal area 
in cellules 5—7 tinged with yellow, but otherwise dark brown, towards the inner margin somewhat suffused 
with violet and only close to the anal angle and at the inner margin sprinkled with grey; the eye-spots are indi¬ 
cated by their distal and proximal yellow bordering. The $ strongly recalls that of aridatha above and has 
like this a yellow transverse band on the fore wing, posteriorly somewhat narrowed, but quite straight; this 
band is yellow on the under surface also, although somewhat lighter than above; the under surface is dark 
tawny but thickly overlaid with grey almost throughout, only the apical part of the forewing and a broad mar¬ 
ginal band between vein 3 and the apex of the hindwing pure brown; the basal area of the hindwing is 
distinctly longer than broad and almost unicolorous dark with no whitish grey spots or with these indistinct. 
This and the two preceding species are the only forms of this subgroup known to me in which the $$ have a 
yellow transverse band on the upperside of the forewing. Old Calabar, Cameroons and Congo. 
atrovirens. D. atrovirens Mab. (39a, b). The <$ is one of the darkest forms in the genus; both wings above 
blackish with dark bluish gloss and without markings, the hindwing, however, lighter at the costal margin, 
dark brown, with indications of the black transverse bands; beneath both wings are dark umber-browm, the 
forewing somewhat lighter at the hindmargin; the cell of the forewing has before the middle a ring-spot margined 
with grey and dark brown, anteriorly open, and at the apex two grey transverse lines, the basal area is bounded 
between the costal margin and vein 2 by a slightly curved line, which is somewhat dentate at the veins and distally 
faintly margined with grey; the apex is sprinkled with violet-grey scales in cellules 6—8; the postdiscal rings 
are very indistinct and the white dots at their proximal ends also scarcely noticeable; the basal area of the hind¬ 
wing is little darker than the ground-colour, distally rounded and limited by a dentate line; this line is not 
margined with light or only very indistinctly and is not accompanied by a dark spot in cellule 4; in the 
basal area there are usually two yellow-grey or violet-grey spots, one in cellule 2, the other in 7, and a ring 
of the same colour in the cell; the postdiscal spots are indicated by light dots at their proximal ends and by 
scarcely visible grey rings; at the anal angle cellules 1 b-—•2 are sprinkled with violet-grey scales for a breadth 
