THE ENTOMOLOGIST. 143 
point, as to which very different opinions have been pro- 
pounded, is the use of the antenne. Some entomologists 
have regarded them as olfactory organs, some as ears, the 
weight of authority being perhaps in favour of the latter 
opinion. In experimenting on his wasps and bees, Sir John, 
to his surprise, could obtain no evidence that they heard at 
all. He tried them with a shrill pipe, with a whistle, with a 
violin, with all the sounds of which his voice was capable, 
doing so, moreover, within a few inches of their head; but 
they continued to feed without the slightest appearance of 
consciousness. Lastly, he recounted some observations 
showing that bees have the power of distinguishing colours. 
The relations of insects to flowers imply that the former can 
distinguish colour; but there had been as yet but few direct 
observations on the point. 
Extracts from the Proceedings of the Entomological Society 
of London, April 6, 1874. 
Sir Sidney Smith Saunders, C.M.G., President, in the 
chair. 
Andrena tibialis and Stylops.—Mr. Frederick Smith com- 
municated to the Society the fact of his having captured 
seven specimens of Andrena tibialis, on Hampstead Heath, 
on the previous Friday, April 3rd, two being females and five 
males. One of the females had the exuvie of two males of 
Stylops remaining in the abdomen, the other female had had 
one male of Stylops, and also a female which of course 
remained in the abdomen of the bee. Of the male Andrena, 
one contained two females, a second having one of the same 
sex remaining in its abdomen. Mr. Smith mentioned this 
circumstance to give collectors of Coleoptera an opportunity 
of capturing the rare Stylops; and recommended searching 
for Stylopized bees between the hours of nine and twelve in 
the morning, as, according to his experience, the Stylops 
always emerged from the body of the bee on the day on 
which the latter first quitted its nest, should the day be 
bright and sunny; and he also mentioned the fact of his 
never having captured a bee which had a male Stylops 
remaining in its abdomen at a later hour of the day than 
