xxiii] Cave 8) 
Wednesday, April 10th, 1907. 
Exhibitions. 
SIMILARITY BETWEEN Dry-sEAson Forms OF ALLIED PIERINE 
Spucorms.—Dr. F. A. Drxry exhibited male specimens of the 
wet- and dry-season phases of the following African and Indian 
Prerine. :-— 
Teracolus achine, Cram. T. antigone, Boisd. 
T. omphale, Godt. Huphina nadina, Lue. 
T. evenina, Wallgrn. H. nerissa, Fabr. 
He remarked that the exhibit illustrated two points :— 
(1) the fact that in Pierine which were subject to seasonal 
xxiv] ) 
dimorphism the dry-season form was often conspicuously smaller 
than its wet-season representative ; and (2) the fact that the 
males of species which were easily discriminated in their wet- 
season phases might be almost indistinguishable from each 
other in the dry-season garb, the same applying, though less 
markedly, to the females. In the case of the four species of 
Teracolus shown, though there was a family likeness between 
all the wet-season forms, they could nevertheless be distin- 
guished ata glance. On the other hand, the dry-season forms 
of the same four species resembled each other so closely in 
aspect, and even in size, that they could not be separated 
without minute examination. He knew from personal ex- 
perience that these dry-season forms were most difficult to 
identify in the field. The two species of Huphina, again, bore 
in their dry-season phase a very close resemblance to each 
other, but in the wet-season they were quite dissimilar. 
He did not advance either of these points as being of uni- 
versal application ; though the former of them, at least, was 
of very common occurrence. 
xxix | 
Wednesday, May Ist, 1907. 
Divercent Mimicry By THE FEMALES oF LEUCERONIA 
arcra, Fabr.—Dr. F. A. Drxey exhibited specimens of 
Leuceronia argia, Fabr., 6 and 9, together with several 
A 3 
