( i) 
plainly how plastic and adaptable they remain for modification 
in any advantageous direction. 
Planema pogget was one of the largest species of its genus, 
and must be very conspicuous in life owing to the very broad 
postmedian transverse rich ochre-yellow band of the fore- 
wings in contrast with the white median band of the hind- 
wings. The Pseuwdacrea—which Mr, Trimen referred with 
some hesitation to Ps. kiinowii, on account of the different 
markings on the under-side of the fore-wings in the premedian 
area—was an excellent mimic of the P/anema in every way, 
except in the narrower white band of its hind-wings. In 
Mr. Hobley’s large collection only one example (2) of this 
Pseudacrexa occurred, and similarly only one of the undescribed 
form of the 2 Pap. merope. 
The characters of the last mentioned were the following, 
vid. :— 
Fore-wing: markings rich deep ochre-yellow,—the sub-apical 
bar, disco-cellular streak, and much narrowed, but superiorly 
prolonged inner-marginal patch being confluent into a wide 
discal band very irregular in outline; some slight fuscous 
sealing on yellow band between 2nd and third median nervules 
indicates the normally wide separation between the sub-apical 
and inner-marginal markings ; ordinary apical spot wanting ; 
two small sub-marginal spots respectively above and below 
2nd median nervule of the same ochre-yellow as the discal 
band. Hind-wing: white patch from base outward much 
restricted, barely reaching middle and extending only just 
beyond extremity of discoidal cell; sub-marginal spots all dull 
ochre-yellow except the three next apex which are white. 
Under-side: Apex of fore-wing and all outer area of hind-wing 
of a paler brown than in the form Hippocoon. Fore-wing : 
ochre-yellow bar as above but rather paler, and with scarcely 
any fuscous scaling between 2nd and 3rd median nervules ; 
an additional sub-marginal very small ochre-yellow spot close 
to posterior angle. Hind-wing: restricted white patch as 
above, but much duller. 
The second example (from Angola) of this form of the 9 
merope agreed very nearly with the Uganda specimen above 
described, only differing in the rather duller ochre-yellow of 
