280 NATURAL -HISTORY OF THE FARM 
life history of mosquitos may be demonstrated by leavinga 
vessel of rain-water exposed on a shaded window-sill, outside, 
where the adult mosquitos may fly to it, for a fortnight 
before it is needed. Eggs will be laid on the surface and all 
stages of development will quickly follow. Living larvee of 
black-flies (“‘turkey-gnats,”’ ‘‘sand-flies,” etc.), horse-flies and 
punkies and alcoholic specimens of bot-fly and horn-fly larvae 
may be shown in demonstration. 
The record of this study may consist of a fully annotated 
list of the pestiferous insects observed. The notes should 
cover such points as the following: 
Time and place of observation and relevant weather 
conditions. 
Kind of animal molested, and sort of molestation (buzz- 
ing, tickling, biting, egg-laying, etc.). 
"Means employed by the animals for evading or in combat= 
ing the pests (standing in water, in wind, in brush, switch- 
ing or biting them, coating their hair with mud, etc.). 
Breeding, places of pests. 
