sunshine the clear parts of the wings sometimes gave an 
iridescent gleam. 
Ixxvii] 
Papers. 
In illustration of his paper “Mimicry in North American 
Butterflies of the genus Limenitis (Basilarchia),” Professor 
E. B. Pourron, F.R.S., showed specimens of Adelpha (Hetero- 
chroa) bredowi, ranging from Guatemala to Arizona, and 
its northern form, named californica by A. G. Butler, from 
California and Oregon. With these he exhibited specimens of 
Limenitis (Basilarchia) lorquini, Boisd., taken together with the 
Adelphas, by Mr. F. D. Godman, F.R.S., in the two last-named 
States. A specimen of lorquini from Esquimalt, Vancouver's 
Island, was also exhibited for the purpose of comparison with 
the southern individuals. Professor Poulton pointed out that 
lorquint resembles the Adelpha and differs from its ancestor 
L. (B.) wiedemeyeri, Edwards, in the cream colour of the 
band which crosses both wings and the presence of a brown 
apical patch on the fore-wing. The specimen from Vancouver's 
Island far north of the range of the Adelpha showed a great 
reduction in the size of the apical patch. The californica form 
of the Adelpha furthermore differed from the southern bredow? 
form and resembled the Z. (B.) lorquini in the reduction of 
the brown mark at the anal angle of the hind-wing, in the 
more broken and irregular appearance of the cream-coloured 
band, and markedly in the broader, shorter shape of the 
wings. These mutual resemblances appeared to offer a 
striking example of Dr. F. A. Dixey’s principle of Reciprocal 
Mimicry (Diaposematic Resemblance). Professor Poulton said 
that he was indebted to the kindness of Mr. F. D. Godman for 
the opportunity of showing the specimens to the Society. 
Ixxix] 
Wednesday, December 4th, 1907. 
REcIPROCAL CONVERGENCE IN Limenttis.—Professor PouLTON 
exhibited 7 males and 4 females of Limenitis (Basilarchia) 
lorquint from Vancouver’s Island; 11 males and 1 female 
