2, AFRICAN SPECIES OF PAPILIO. 
names in long genera should maintain a uniform character, yet | 
think the present is an instance in which the uniformity which has 
prevailed in the names of the species of the present genus, being 
selected from names celebrated in ancient story, may be broken. 
It has already been done in the name of a species dedicated to 
Latreille, and entomologists will, I trust, agree with me in the 
propriety of adopting the name of the most distinguished modern 
French lepidopterist as that of a species for the knowledge of which 
I am indebted to his liberality. 
On the upper side it is of a dull blackish-brown colour, the body 
marked in front with several white dots, and the wings with a 
broad white fascia extending from the anal margin of the hind 
wings half-way across the fore wings; another oblique broad white 
bar extending across the fore wings beyond the middle, occupying 
the extremity of the discoidal cell. The tip of the wings is 
marked with a small white marginal dot; the white bar on the hind 
wings is gradually shaded off into the ground colour of the middle 
of the wing. On the under side the fore wings are dark brown ; 
the apex, beyond the oblique bar, being luteous-coloured. The 
base of the hind wings fulvous clay-coloured, with black markings; 
and the apical half of these wings fulvous-brown, the white mark- 
ings being as on the upper side. The abdomen is pale luteous at 
the apex; the thoracic portion of the body black with white 
spots. 
Received by M. Boisduval from M. Westermann, and inhabits 
Sierra Leone. 
Specirs XXI.—PAPILIO HIPPOCOON. 
Syn.—Papilio Hippocoon, Fabr. Ent. Syst. 3, 1, 28. Jones, Icones, fig. pict. 1, tab. 88. 
Boisd. Sp. Ins. Lep. 1, 243. 
Papilio Westermanni, Boisduyal, op. cit. p. 372. 
Papilio Niavius fem, Cram. 234, A. 
Messrs. Godart and Boisduval have failed in their writings to 
recognise this as a Fabrician species, although Boisduval describes it, 
ex visu, from a specimen furnished by M. Westermann, adding the 
description of Hippocoon from the works of Fabricius alone. The 
upper and under sides are beautifully figured in Jones’s Icones, 
which have enabled me to identify the species. Cramer gave it as 
the female of a species of Danais (D. Niavia), to which indeed it 
bears great resemblance. It is a native of Guinea and Sierra 
Leone. 
