liii, liv] (a 
ever made special observations on the two forms which are an 
interesting addition to our knowledge of them. The differ- 
ences revealed in the course of this inquiry had convinced Mr. 
Leigh that the two forms are entirely distinct species. Pro- 
fessor Poulton was by no means convinced of the soundness of 
this conclusion. The extraordinary facts now recognized in the 
genus Precis show us that differences of instinctive behaviour are 
not necessarily evidence of specific distinction. Indeed every 
difference relied upon by Mr. Leigh breaks down when tried 
by the test of this searching comparison. Professor Poulton 
much hoped that the food-plant would be discovered, eggs 
obtained, and the enly convincing evidence made available. 
The following paper shows that Mr. Leigh is intimately ac- 
quainted with these forms in Natal, and the Society may 
anticipate that his energy and powers of observation will 
ultimately lead to success in the decision of this difficult and 
interesting question. 
Notes on Luralia wahlbergi, Waticr., AND HL. mima, TRIM., 
BY G. F. Lerten, F.E.S. 
Having read (Trans. Ent. Soc. Lond. 1902, pp. 491, 492) 
that these two butterflies are thought to form but a single 
species, I have during this season (1904-5) been closely obsery- 
ing their habits. I now offer full particulars of what I have 
seen,—particulars which in my opinion support the conclusion 
that the two forms are entirely distinct species. 
It has been inferred that they are probably the same species 
because “they have been taken in codtw several times ” (U.c., 
p. 491). This I do not regard as very strong evidence ; for I 
have taken Evronia cleodora and E. leda, in coitu, also Neptis 
agatha and Lurytela hiarbas. The only intermediate specimen 
1 know of here may well be a hybrid result of such pairing ; 
for the characters of both mdma and wahlbergi are represented 
upon it. The other reason given is “that the two forms are 
always found together wherever they are met with in any 
number ” (/.c., p. 491). This may be a fact, but it is also true 
that they fly just as often with Planema esebria, Planema 
aganice, Amauris echeria, and Papilio brasidas, E. mima very 
much resembling the latter when onthe wing. I give below a 
