33 
divide them into as many groups as possible, observing 
the main characters of each. 
(vi) Place each variety in small bottles, over 
the neck of which a piece of mosquito netting must 
be tied as soon as the larvae have turned into nymphae. 
When the adult insect has hatched out, note its 
attitude and any other special features. 
To Kill Mosquitoes 
1. A mosquito that has just hatched out from 
the nympha should not be killed for some hours until 
its exoskeleton has hardened. If it is killed imme¬ 
diately, the wings on drying will shrivel, and. possibly 
the whole insect become distorted. 
2. Allow the insect or insects to escape into 
a clean, dry, glass vessel. 
Pour some chloroform on a pellet of wool and 
place under the jar, but take care that the mosquitoes 
do not get wetted by the chloroform. Leave them 
exposed to the vapour of chloroform some little time 
after apparent death. Tobacco smoke may also be 
used for killing, or simply concussion. 
After killing, turn the mosquitoes out upon a 
sheet of clean paper. 
To Mount Mosquitoes* 
Necessary apparatus— 
Fine silver pins. No. 20. 
Thin cardboard or thick paper. 
Large entomological or ordinary pins. 
Entomological forceps. 
Specimen tubes with corks. 
* Note. —If from any cause it is impossible to mount mosquitoes they may be 
preserved in the following way:—Without pinning, place in a tube, separating 
one from the other by tightly-fitting plugs of paper so as to prevent any shaking. 
The mosquitoes can afterwards be relaxed with benzine. (Newstead.) 
