I. Sub-Order NEMATOCERA. Feeler, except the frst t\co Joints, com posed of many similar joints. 



This comprises the mosquitoes, gnats ;md midgets, — all more or less mosciuitci-like. witii slciult-r bodies, 

 long legs and small heads and eyes. Generally of" delicate huild. thnu<;h tjradually apjiKiaching the next 

 division. 



II. Sub-Order BRACHYCERA. Feeler sliort. of few and nneqnal joints ; sometimes a bristle at tlieend. 



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, -cl/ic/i they seldom leave. 



Instead of" ileveloping t"rom the egg to the maggot, pupa and My, like all the t"oregoing, tlie female gives 

 birth ti) the pupa, f"rom whicli the insect is transformed. 



OBSERVE THE WING. The veins running t"rom the shoulder to the edge are called length-veins ; those 

 from one vein to another, cross-veins ; a space encloseil bv veins is called a cell . On some wings a vein 

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

 the edge of the wing, nor those t'rom the first cross-vein to the shoulder : onlv those in the mitkile of wing. 



(4) 



