1894.] from british east aj-rica. 559 



5. Mtcalesis (Monoteichtis) eusirtts. 



Mycalesis eusirus, HopfEer, Ber. Verb. Ak. Berl. 1855, p. 641. 

 n. 13. 



Ngatana, December and January ; shores of Lake Dumi, 13th 

 February ; Njempo ; steppes of Thika-Shika on grassy plateau 

 west of the Lower Falls, 16th July. 



6. Enotesia, sp. 



One poor example of a species near to E. ankoma (Mycalesis 

 anJcoma, Mabille) ; the primaries, however, are a little less angular 

 than in that species, and the outer edge of the dark central belt is 

 zigzag throughout. 



Ndoro ; steppes at base of Kenya, 7000 feet. 



Neoccentra, Butl. 



The present collection proves that this genus must be much more 

 extensive than I had supposed. In the first place, there are sexes 

 of my N. duplex agreeing very closely in pattern, the female being 

 entirely without the red markings of my supposed female from 

 Somali, thus proving that the latter is a distinct species (for 

 which, therefore, I propose the name of N. rufilineata). Secondly, 

 there is a species allied to N. dwplexdiadi N. ypthimoides, but nearer 

 to the former. 



Neoccenyra, at first sight, would appear to be scarcely distinct 

 from Strabena, Mab., if we were to accept that author's decision as 

 regards the type of his genus. Although in 1877 M. Mabille 

 bad already described a single species under the generic name 

 Strahena (S. smithii, Pet. Nouv. p. 157), he stated in M. Grandidier's 

 ' Hist, de Madagascar ' that Satyrus tamatavce, Boisd., was the 

 type of his new genus. 



If this loose treatment of the types of genera is permitted, it 

 will necessitate alteration of the names of scores of well-known 

 groups, the types of which have been figured or referred to by 

 both Hiibner and Felder, without any definite statement that the 

 species thus indicated are the types of their genera. 



The only safeguard is strictly to follow the method adopted by 

 Scudder, accepting the author's first mention of his genus, as 

 then used, and ignoring all his subsequent decisions : the first 

 species recorded under a new generic name, i£ unaccompanied by 

 other species, or any statement as to the type of the said genus, 

 thus becomes, and must for ever after remain, the typical species. 



The genus Strahena, as represented in the ' Histoire de 

 Madagascar,' contained heterogeneous material, and the so-called 

 type differs in no structural character from one of the species 

 placed by the same author under Pseudonympha : thus M. Mabille 

 says that the latter genus is characterized by its long antennae, the 

 club of which is distinct, oboval, and laterally compressed ; but his 

 P. goudotii has the club cylindrical and with a longitudinal groove 

 below, as in S. rakoto, vinsonii, ibitina, tamatavce, &c. ; it also has 



