THE MOSQUITO 61 



in a room with a dark dado it was on the 

 dado that the mosquitos were found rather 

 than on the whitened walls above. Buchanan 

 noted that the men when collecting Anopheles 

 in an Indian hospital found they were to be 

 most easily got by hanging up a dark 

 coat or two upon the walls. A white coat 

 they always avoided. The proverbial yellow 

 dog of the West is much less bitten than the 

 Newfoundland, and persons wearing dark socks 

 and black shoes are more bitten than those 

 who wear light ones. Natives, although they 

 suffer less in health having acquired a certain 

 immunity, are undoubtedly more bitten than 

 the Europeans. 



The experiments we carried on at Cam- 

 bridge were as follows : In the large gauze 

 cubical tent in which the mosquitos were 

 bred and kept, a number of pasteboard 

 boxes without lids, measuring 20 by 16 by 

 10 cm., were piled up. The boxes were lined 

 with seventeen different coloured cloths, and 

 were placed in rows one above another, and 

 the order was changed each day, so that no 

 question of height from the floor or better 

 illumination entered into the problem. Counts 

 were made of the inhabitants of each box on 

 each of seventeen consecutive days, with the 

 following results : — 



