65 



Flies. — These have only two wings, usually transparent. 

 Behind each of these wings a short thread with a knob on it 



extends out on each 

 side of the body instead 

 of hind wings, Fig. 13. 



Fig. 13. Flies — showing the knobs just below the wings. Note that flies 

 have only two wings, a, Crane fly. b, Pomace fly — enlarged. 



Fig. 15 The Red Admiral Butterfly. 

 Noie the knobbed antenna:. 



House-flies, horse-flies and mosqui- 

 toes are examples of flies. 



Bees, Wasps a Jid Ants. — Bees, wasps 

 and the winged form of ants have four 

 transparent wings, Fig. 14. Some flies 

 resemble bees and wasps but if exam- 

 ined it will be found that they have only two wings instead of four. 

 Butterflies and Moths. — Butterflies and moths may be told 

 apart by the following character: The antennae or horns of the 

 butterflies are always threadlike and knobbed at the tip. Figs, 15, 

 16, while the antennae of moths are in various shapes, but never 

 bear knobs at the tips. Figs. 17, 18, 19, 20. 



Fig. 14. a, IVasp. b, Bee. 

 Note these have four wings. 



