Mosquitoes hiding during the day. 
63 
MOSQUITOES PROBABLY HIDING IN JUNGLE, WOOD 
AND FOREST DURING THE DAYTIME. 
What becomes of a very large number of mosquitoes during 
the daytime? We certainly find many indoors, but by far the 
greater number must go elsewhere. In our common European 
species, C. pipiens, L., and A . maculipennis , Meig., I have noticed 
that they seem to disappear in the morning if the windows are 
left open, and that they may often be seen beating against the 
glass trying to enter the house in the evening. On collecting in 
a wood behind my house I found C. pipiens in numbers amongst 
the foliage of ash, oak and low shrubs, and also a few Anopheles. 
It therefore seems that some at least take shelter in woods 
during the daytime. 
This view is also brought forward in an interesting despatch 
received from Lieut.-Col. Macree, from Dacca, which is appended 
here in full, as it contains other points of interest: “So far as 
Dacca town is concerned, I have ne^er known any place where 
mosquitoes are so numerous, so vigorous and so persistent. At 
first sight it would seem (accepting the mosquito-malarial 
theory) as if every human being should be saturated with 
malaria. . . . Not a single species of the genus Anopheles , the 
spotted-winged variety, could be found. It is possible the latter 
may be more or less prevalent in the town during the rainy 
season, but at present (March) there are none.” Further on in 
the despatch he says : “ About a year ago two of the School 
Assistant Surgeons paid a visit to a village to the north of the 
town some five miles distant on the borders of' the Bhawal 
Jungle, inhabited by some Manipuri political refugees, and had 
the curiosity to examine a large proportion of the villagers, 
finding a large percentage of them suffering from enlarged spleen, 
and showing many other signs of malarial poisoning. I resolved 
therefore to despatch Assistant Surgeon Jogessur Mookerjee, 
who had taken much trouble in making the collection, to this 
village, in the hope of finding the malarial mosquitoes, and was 
not disappointed. Two or three species of Anopheles were 
found here, but not in any large numbers. The Assistant 
Surgeon paid several visits to this village and seldom found any 
other variety of mosquitoes. The females largely preponderated. 
So he came to the conclusion that the insects returned to the 
