CLASSIFICATION yj 



four, or the female with six, bristles; marginal vein running round 

 the whole border of the wing; tegulae rather large. 



Asilidae. Soldier flies. 



Third joint of antennae simple; under lip forming a horny sheath 

 about as long as head ; body long, clothed with stiff bristles ; thorax 

 narrowed before; face bearded below; predaceous. 



Bombyliidae. Bee flies. 



Third joint of .antennae simple; body short and thick; wings 

 extended horizontally on each side of body; proboscis long, por- 

 rected in front of head; ocelli three; legs long and slender; body 

 generally thickly clothed with hairs, which are easily rubbed off. 



Syrphidae. Syrphus flies. 



Proboscis with four internal pieces, long, elbowed near the base, 

 terminated by two large labial lobes; antennae three-jointed, last 

 joint largest, dilated, simple, bearing a bristle. Insects of moderate 

 or large size, variegated in color. 



Dolichopidae. 



Antennae short, third joint oval, or pallette-shaped, emitting a 

 long seta, or bristle; legs long and slender, strongly bristled. 

 Small, slender flies, generally of brilliant metallic colors; found on 

 leaves and in damp places. 



Oestridae. Gadflies, botflies. 



Antennae short, inserted in rounded pits ; middle part of face 

 very narrow ; mouth very small, organs rudimentary ; tegulae large ; 

 bodies rather large to quite large, hairy. 



Tachinidae. Tachina flies. 



Bristle of antennae bare, or with very short pubescence; thorax, 

 short; body bristly, stout; abdomen oval or cylindric, first segment 

 much shortened ; many of the gray species with tip of abdomen 

 reddish. 



Muscidae. House flies, blowflies. 

 Antennal bristle entirely plumose, or pectinate; body not slender; 



