(desi 4) 
and third pairs of feet were equal and similar in one specimen 
and unequal and dissimilar in the other. He pointed out 
that in all the African Acraeas, except about sixteen species, 
the male tarsal claws were unequal. A. circeis was amongst 
the latter, and in many cases of close similarity of pattern 
this feature provided a ready means of distinction. In such 
cases, however, there was as a rule some difference of pattern 
correlated with the structural difference in the claws. The 
present case was an exception to that rule. He had hitherto 
regarded the form now exhibited, which was recognisably 
different from A. circeis, as A. servona, but the discovery of 
a form identical in appearance with the supposed servona, 
and differing only in the structure of the claws, raised a 
serious difficulty, inasmuch as the type of servona was a 
female, and since all female Acraeas had equal claws, it was 
quite impossible to say to which of these males the type 
servona belonged. There were female examples in the series 
from which the present specimens had been taken, but they 
were all alike. The equal and the unequal clawed forms 
must apparently be regarded as different species in spite of 
the absence of difference in wing pattern. If the females 
of both these species were as similar in appearance as the 
males the true identity of A. servona would never be dis- 
covered. The male armature of these species was of a very 
simple character, and afforded but little evidence of a specific 
distinction. 
In answer to an inquiry from Mr. Brrnune-Baker, Mr. 
Eltringham said that he had made many preparations of the 
? organs, but that in this group of Acraeas they did not 
provide distinctive characteristics. A long and interesting 
discussion followed on the question of the importance of the 
tarsal claws as a means of specific distinction, and on the 
possible correlation of uneven claws in the gand the abdominal 
sac in the 2, in which the Presipent, Professor PouLton, both 
the SrecreTaries, and Messrs. GAHAN, CoLLIN, WATERHOUSE 
and JANSON joined. 
Descriptions oF British RHopaLoceRA.—Mr. CHAMPION 
called attention to a paper by M. Roger Vérity in the 
‘Bulletin de la Société Entomologique de France,” Séance 
