62 



MORE MINOR HORRORS 



Colour of box 



Navy blue 



Dark red 



Brown (reddish) 



Scarlet . 



Black . 



Slate grey 



Dark green (olive) . 



Violet 



Leaf green 



Blue 



Pearl grey 



Pale green 



Light blue (forget-me-not) 



Ochre . . . . 



White . 



Orange . 



Yellow . 



Total . 



Average number 

 of mosquitos 

 in each box. 



108 

 90 

 81 

 59 

 49 

 31 

 24 

 18 

 17 

 14 



9 



4 



3 



2 



2 



1 







512 



It will be noted that about the level of 

 the pearl grey there was a marked drop. 

 Pale green and pale light blue, ochre, white, 

 orange, and yellow — especially the last two 

 colours — seem positively to repel the insect. 

 Our khaki-clothed soldiers have other ad- 

 vantages than invisibility to the foe. This 

 matter is worth pursuing farther, and it 

 might be possible to design mosquito-traps 

 lined with navy-blue ; by periodically ex- 



