Proceedings 61 
“Hoop” may be heard at mid-day in the woody valleys in 
Northern Lombardy. The three forms of the Skua, the 
Great, the Potamorhine and the Arctic were rudely drawn 
so as to shew the differing lengths of the central tail- 
feathers and the crescentic markings upon the sides of the 
body ; also their darker hoods. 
MEETING held at Reigate Feb. 27th, 1903. 
Present—42. 
The Rev. R. Ashington Bullen, F.G.S., F.L.S., delivered 
his Lecture on ‘“‘Harlyn Bay; the problems set by its Im. 
terments, its Implements, its Mollusca.” Harlyn Bay, on 
the north Cornwall coast, is the site of a prehistoric burial- 
ground, of Neolithic age. The lecturer gave an interesting 
account of the excavations, revealing more than 200 slate 
cists, containing skeletons, which had been buried in the 
*Crouched” position. Many specimens of Stone Imple- 
ments, and of the Mollusca found, were exhibited, and the 
lecture was also illustrated with a number of lantern slides, 
which were kindly shown by Mr. S. H. Lury. 
MEETING held at Reigate, March 2oth, 1903. 
Present— 38. 
A Lecture on ‘Protective Resemblance and Mimicry in 
Insects,” was then delivered by Mr. J. W. Tutt, F.E.S. The 
Lecture, which was illustrated with lantern slides, dealt 
with the variations in the colouring of insects, enabling 
them in many instances to rest in perfect concealment on 
tree-trunks, stone walls, and lichen covered palings. In 
_ some cases, insects possessing no other means of self- 
defence, mimicked the shape and colouring of some con- 
spicuously marked species which. were known to be un- 
palatable to insect-eating birds. It was noticeable that 
many species became darker each year in the vicinity of 
_ large towns, especially in the manufacturing districts. They 
_ thus more closely resembled the more grimy trees and 
palings to be found in such localities. 
