COLLECTING, PRESERVING AND APPLIANCES 



29 



about 18in. high, so as to form the supports of a miniature 

 Mosquito net made of gauze or the material known as 

 " leno," which is made close by means of tin tacks to the 

 edges of the plank. 



The whole thing can be lifted off and on to the dish, 

 and when in position a Mosquito introduced into the net 

 is securely confined. The triangular corners of the board 

 can be utilised to carry banana or syrup as food, or may be 

 smeared with mud in order to ascertain if the species ever 

 deposit eggs in such situations. It is best to experiment 



Fig. 9. — Apparatus for Breeding-out Insects. 



with females that have had a feed of blood ; or in the case 

 of sylvan gnats with specimens taken in the open, as unless 

 fully fed they will rarely deposit their eggs. The form of 

 the egg boats, or groups in which the eggs are deposited, 

 should be carefully noted and the larvse preserved when 

 sujfficiently grown. 



It is rarely necessary to confine males, as most species 

 couple immediately after escape from the pupa. 



The above appliance is also useful for obtaining from 

 larvse large numbers of individuals for use in observations 

 on malaria, filariasis, &c. A piece of cardboard is slipped 

 under the opening so as to close it, and in this way the 

 contained Mosquitoes can be carried without injury to the 

 subject of experiment, and liberated under his Mosquito net 

 by simply removing t]:ie card and inverting the net. 



By means of a simple apparatus of this sort the life 



