I. SUB-ORDER NEMATOCERA. Feeler, except the first tvo joints, composed of main' similar joints. 



This comprises the mosquitoes, gnats and midgets, all more or less mosquito-like, with slender bodies, 

 long legs and small heads and eyes. Generally of delicate build, though gradually approaching the next 

 division. 



II. SUB-ORDER BRACHYCERA. Feeler short, of fc\c and unequal joints : sometimes a bristle at t/ie end. 



This comprises the various flies, all more or less like the house fly. though some resemble wasps, bees or 

 bumblebees ; generally of robust build, strong bodies, stout legs ; head and eyes large. 



III. SUB-ORDER PUPIPARA. Parasites on animals, -c/iic/i tliev seldom /care. 



Instead of developing from the egg to the maggot, pupa and fly, like all the foregoing, the female gives 

 birth to the pupa, from which the insect is transformed. 



OBSERVE THE WING. The veins running from the shoulder to the edge are called len^t/t-i'fi/is : those 

 from one vein to another, cross-veins: a space enclosed by veins is called a cell. On some wings a vein 

 splits into two or more branches ; then it is called forked . Do not count the cells which border one side on 

 the edge of the wing, nor those from the first cross-vein to the shoulder: only those in the middle of wing. 



(4) 



