Mr. G. F. Hampson on East- African Lepidoptera. 179 



instance with a method as yet unused, we were compelled to 

 annul the relations which had hitherto been established, and 

 out of a single Mammalian order even to form two others, 

 genetically very distinct, namely those of the toothed and 

 whalebone whales. And thus we have demolished, instead 

 of reconstructing. Yet we have gained something in return — 

 a firmer basis, on which we may distinguish what is ancestral 

 from that which is newly acquired. 



XX. — Lepidoptera from the Sabaki River, East Africa, xoitli 

 Descriptions of new Species. By G. F. Hampson, B.A., 

 Coll. Exon., Oxon. 



The following is an account of a small collection of Lepido- 

 ptera made by Mr. Keith Anstruther, of the British East- 

 Africa Co.'s service, in the Sabaki River district ; and as very 

 few species have been recorded, from the interior of East 

 Africa, and none from this district, I give a list of them in 

 full. The types of the new species have been presented to 

 the Natural-History Museum. 



RHOPALOCERA. 

 1. Limnas Klugii, Bull. 

 2. Limnas chrysippus, Linn. 

 The small dark African form. 



3. Tirumala petiverana, Doubl. & Hew. 



Mycalesis, subgen. no v. Monotrichtis. 



With a glandular pouch and tuft of hairs on both fore and 

 hind wings, thus belonging to Mr. Moore's first group of 

 subgenera of Mycalesis. 



Allied to the subgenera Virapa and Garesis. Male with 

 the glandular pouch on the fore wing, a small oval patch 

 below the submedian nervure only, and covered with short 

 scales, and no tuft of long hairs. Fore wing with the apex 

 rounded as in Garesis ; the inner and outer margins more 

 rounded ; costal, subcostal, and median veins swollen at the 

 base ; the venation similar. Hind wing with the costa 

 highly arched, as in Virapa ; the first subcostal much curved 

 up, as in that genus, not swollen at the base as in Garesis. 

 Eyes slightly hairy. 



Type M. {Monotrichtis) sajitza, Hew. 



