39 
well as the differences in the formation of the female antennze, in which 
sex some of the species possess those organs almost filiform, whilst in 
others they are nearly as strongly pennated as in the males. 
In the following pages thirty-three African species are introduced, 
of which seventeen are now for the first time described. 
For convenience the following artificial mode of division is em- 
ployed in their arrangement :— 
A. Fore-wings very sickle-shaped ; with a small eye-like spot near 
the tip. 
a. ‘AN the wings with a glassy lunate central spot. Sp. 1. 
6. Fore-wings with a central bean-shaped vitreous spot ; hind- 
wings with large oval one. Sp. 2. 
B. Fore-wings less strongly sickle-shaped or rounded externally ; all 
the wings with an eye-like spot. 
a. Hind-wings not tailed. Sp. 3-10. 
6. Hind-wings tailed. Sp. 11, 12. 
C. Fore-wings with a small triangular or quadrate vitreous central 
spot ; hind-wings with a large eye. Sp. 13-24. 
D, Wings without eyes or vitreous spots. Sp. 25-28. 
E. Aberrant species. Sp. 29-33. 
Section A. 
Subsection a. 
Sp. 1. Saturnia Vacuna, Westw. (Pl. VII. fig.1.¢) S. alis 
maris faleatis fuscis, fascia communi media alba, omnibus lu- 
nula magna media vitrea, utrinque albo flavoque marginata ; 
anticisque macula ovali nigra subapicali (albo supra cireum- 
data). 
Expans. alar. func. 64; 9 une. 54. 
Inhabits Ashantee. In the British Museum. 
The male has the fore-wings considerably faleate at the tips, and 
the hind ones almost triangular. The female has the fore-wings 
somewhat emarginate in the middle of the hind margin, and the 
hind-wings less elongated. The general colour of the wings is brown, 
thickly irrorated, especially in the males, with white. The fore- 
wings have a broad suboblique bar, extending from the base of the 
inner margin and directed forwards in a right angle immediately in 
front of the central lunule, the margin of which is formed of a nar- 
row brown bar, within which it is dirty yellow, internally edged with 
white, the central part being vitreous. This is followed by a white 
oblique nearly straight bar, the brown space beyond which is much- 
powdered with white; the apical margin is pale livid buff, traversed 
by a very slender undulating brown line, with a black oval dot near 
the apex, which is powdered at its base with white ; the apex of 
the wings being rosy fulvous, separated from the livid brown ante- 
cedent part of the wing by a very much-angulated white line. 
The hind-wings are white at the base, which extends on the out- 
side and joins the central white fascia ; the apical portion is coloured 
