60 RHOPALOCERA AFRICA AUSTRALIS. 



ish, macular, angulated stripe. UNDER- SIDE. Fore-wing : 

 tinged with pale lemon-yellow ; apex pale orange-ochreous, 

 bordered inwardly as on upper-side, but more faintly ; below 

 last blackish spot and third median nervule, a faint-blackish 

 mark defines extremity of inner-marginal band. Hind-wing : 

 pale orange-ochreous, a brownish disco-cellular spot ; a dark 

 mark on costa, beyond middle, commences an indistinct, 

 transverse, angulated row of brownish spots. 



This very striking and peculiar species may be readily recognized by the 

 dull-ochre tint of the apical marking, and the intense blackness of the inner- 

 marginal band. The above description of the $ is from a specimen taken 

 at King William's Town by Mrs. Tyrwhitt Drake, now in Mr. B'Urban's 

 collection. M. Boisduval describes the ? Eris as being sometimes sul- 

 phur-yellow. The same author, in his Appendix to M. Delegorgue's 

 " Voyage dans L'Afrique Australe," remarks that specimens he received 

 from Natal do not differ from those found in Nubia and Senegal ; and also 

 that it is a somewhat rarer species than A. lone, at Natal. 



Natal. Coll. mihi, et Coll. S. A. Mus. 

 King William's Town, British Kaffraria. Coll. W. S. M. 

 D'Urban. 



" Natal. Senegal. Nubia. Arabia." Boisd. 



Genus IDMAIS. 



Idmais, Boisd. 

 Mancipium (pars), Horsf. 

 Pieris, Godt. 



IMAGO. Head of moderate size ; antennoe rather short, 

 ending in a broad, abrupt club ; palpi short, hairy ; eyes 

 moderately prominent. Thorax of moderate size and thick- 

 ness. Fore-wings more elongate than in Anthocharis, but 

 general outline very similar. Hind-wings rounded, somewhat 

 truncate, not so large in proportion to the rest of the insect 

 as those of Anthocharis. Abdomen long and slender, but not 

 extending to anal angle of hind-wings. 



This Genus approaches Anthocharis in structure, but may 

 be distinguished by the shorter antennae and palpi, and 

 broader and more abruptly formed club of the former organs. 

 The Genus does not contain many species, and these few are 

 all inhabitants of the warmer regions of the Old World. 

 Only two species are recorded from Southern Africa, and of 

 one I can only find the name in M. Boisduval's Appendix to 

 Delegorgue's Travels. As he states, however, that the female 

 of his Idmais Vesta is figured in the " Genera of Diurnal 

 Lepidoptera," under the name of Idmais Chrysonome, Klug., 

 I have thought it advisable to make a description of some 

 specimens bearing the latter name in the Collection of the 



