380 
OXYLIDES. By Dr. C. Aurivillius. 
mazanguli. 
hatesi. 
leonis. 
nigra. 
Forewing above at the costal margin as far as the discal cell and vein 6 black, with a fine transverse streak 
in the cell behind the middle and a thick transverse spot at the cell-end likewise black, these two transverse 
spots being united at the posterior margin of the cell, covering the base of area 2 and enclosing a round white 
spot at the cell-apex; marginal band very broadly black with two white subapical spots in 4 and 5; the under 
surface only deviates by the discal cell being filled up with black, with a white spot at the apex, and by the 
marginal band being broken up into a curved discal band and a marginal band of only 1 mm width; the ground¬ 
colour therefore forms here a broad submarginal band very much narrowed in area 2. Hindwing above with a 
narrow black marginal band being somewhat broader at the costal margin and enclosing a fine white line at 
the anal angle; vein 1 b at the base narrowly bordered with black. The under surface only deviates by the 
marginal band-line being narrow and by a black discal band being triangular at the costal margin and then 
broken up into small spots, ending at vein 2. Gabun. 
Ps. mazanguli Neave (66 g) is very closely allied to the preceding species. The differences are men¬ 
tioned in the review of the species and are visible from the figures. Congo District: Lualaba. 
Ps. batesi Ham. Bruce (66 g). The upper surface of the forewing has already been described above; 
on the under surface the discal cell is blackish-grey as far as the apex, with a narrow white transverse streak 
behind the middle of the cell, and behind the middle of the wing there are three grey nebulous bands, the two 
first of which extend to vein 2 and are posteriorly pointed, whilst the third is narrow and reaches vein 1, and 
a marginal band of 2 mm width. Hindwing on both sides white, above only with a black, unspotted marginal 
band of 5 mm width, beneath at the margin somewhat greyish, with a fine, dark, almost straight transverse 
line from the costal margin to vein 2 and a similar submarginal line united with the discal line at vein 2 and 
continued to the proximal margin as a black line; the areas 1 a and 1 b on the exterior of the submarginal line 
are yellow with a black dot. Forehead yellow. Cameroon: Bitje. 
Ps. leonis Stgr. (66 g). Forewing on both sides black with a longish, narrow spot of the posterior 
margin, not or scarcely reaching vein 2, a small spot at the apex of the cell, an anteriorly pointed discal band 
of the areas 2 to 5 and a posteriorly pointed subapical band, white; the <$ is without the subapical band above. 
The hindwing deviates from all the other species by the black discal band described in the review of the species; 
on the under surface the black marginal band is entirely absent; the discal band is filled up with white, and 
a thick, black longitudinal stripe extends from the base along vein 1 b to the yellow, black-dotted anal spot. 
Sierra Leone. 
Ps. nigra Holl. is distinguished by both wings being above black with white markings; forewing with 
a white dot at the cell-apex and a slanting discal band being almost vertical towards the middle of the costal 
margin, white; hindwing above with a white longitudinal stripe from the base to the middle of area 2. Forewing 
beneath with the same markings as above and besides with a white subapical spot. Hindwing also beneath 
with the white median stripe and besides with two bluish-white transverse lines beyond the middle; the proximal 
margin and anal area yellowish olive with two short, silvery bands bordered with black at the proximal margin 
and at the bases of the small tails one black spot each distally bordered by a silvery blue. Ogowe River. 
6. Genus: Oxylides Hbn. 
Oxylides is allied with the following genus, but easily discernible by the marks mentioned in the review. 
The relative length of the three small tails of the hindwing is particularly peculiar of this genus. — W ings in 
all the species beneath white with a dark transverse line in or a little behind the middle and with three black 
marginal spots more or less scaled metallic at the anal angle of the hindwing in the areas 1 b, 1 c and 2. In 
the d'c? the wings are above violettisli-blue, the apical half of the forewing and the apex of the hinclwing being 
black and the anal region of the hindwing more or less white. There are no hair-pencils, mealy spots or any 
other similar marks of distinction. 
The stages of development are unknown. 
Review of the Species. 
A. Both wings beneath in the basal part as far as the discal transverse line one-coloured white without 
markings. The transverse line of the forewing extends almost exactly in the middle of the wing. Hindwing 
beneath with another antemarginal transverse line proceeding from the apex or from vein 6 and extending 
to the end of vein 1 a, but sometimes interrupted in the areas 2 and 3. 
a. Hindwing beneath at the anal angle not yellow. The discal transverse line beneath in its whole length 
brownish-yellow, finely bordered with black. 0. faunus. 
[3. Hindwing beneath at the anal angle between the anal spots and the distal transverse line in the areas 
1 b to 2 extensively suffused with yellow. The discal line beneath from the costal margin of the 
forewing to vein 3 of the hindwing black, behind it yellow. 0. bella. 
