144 
and said that ornithologists were now turning their attention 
very largely to the study of this habit. Mr. Carrington 
described at some length the work of the Committee which 
had been investigating and gathering statistics as to migra- 
tion, and remarked upon the great assistance which the 
persistent observations of lighthouse keepers were rendering 
to that Committee. 
Mr. Tutt exhibited male and female specimens of the bee 
Bombus lapidarius, and also specimens of the parasitic bee 
Psithyrus rupestris, which lives in the nests of the former, 
and appropriates the cells for its own offspring. 
A paper was communicated by Prof. A. Radcliffe Grote, 
entitled ‘‘ The British Day Butterflies and the Changes in 
the Wings of Butterflies ”’ (ante, p. 43). 
OCTOBER 14th, 1897. 
Mr. R. ADKIN, F.E.S., President, in the Chair. 
Mr. Mansbridge exhibited a series of the more noticeable 
variations of Adraxas grossulariata bred this year from larve 
sent to him from Horsforth, Yorkshire. He found the 
percentage of varieties this year much less than last, for out 
of some two hundred larve he only bred fifteen showing 
anything beyond the ordinary range of variation. The 
variation was in the same direction as that which had been 
observed in the imagines bred from the same locality in 
previous years, viz. a gradual suffusion of the basal and 
central areas of the fore-wings with black. 
Mr. South exhibited a series of Acidalia inornata reared 
from ova deposited by a female specimen taken at Oxshott, 
and on behalf of Mr. Sabine, of Erith, two specimens of 
Callimorpha dominula, var. rossica, from Dover. 
He also exhibited two examples of Pieris vape, which 
Mr. Sabine had taken at Folkestone in September last, 
each of which had a small black spot on the hind wings 
placed between veins 3 and 4. Referring to this unusual 
aberration in the species, he stated that he had seen similar 
spots occupying exactly the same position in examples of the 
second generation of P. napi. In Mr. Leech’s collection there 
were some female specimens of P. extensa, var. eurydice, and 
of P. melete, var. mandarina (both Chinese insects allied to 
P. napi), which had these black spots. In the examples of 
mandarina there were other marks which seemed to indicate 
that the spots were simply remnants of a band, and this was 
