408 THE CANADIAN ENTOMOLOGIST 



. Cruciate frontal bristles present; sternopleurals not in a 

 nearly equilateral triangle; hind metatarsus with basal 

 ventral bristle FuceUince 



— Cruciate frontal bristles absent; sternopleurals in a nearly 



equilateral triangle; hind metatarsus without basal ventral 



bristle CcenosiincB 



Females 



1. Sixth vein very short, seventh abruptly bent Torward round 



apex of sixth; lower orbital bristle directed outward •o\'er 

 eye Fanniince 



~ Sixth vein complete or incomplete, seventh not abruptly bent 

 forward round apex of sixth; lower orbital either directed 

 forward or inward 2 



2. Sixth vein complete; under surface of scutellum usually with 



soft, upright hairs at apex; hind metatarsus with basal 

 ventral bristle .' Anthoviyiince 



— Sixth vein complete or incomplete; under surface of scutellum 



never wdth soft, upright hairs at apex 3 



3. Cruciate frontal bristles absent - 4 



— Cruciate frontal bristles present 6 



4. Pteropleura with a conspicuous group of setulose hairs in 



centre; palpi much dilated apically Lispince 



— Pteropleura without a conspicuous group of setulose hairs in 



c€:ntre 5 



5. Sternopleural bristles 2 to 4 in number, if 3 are present they 



are never arranged in a nearly equilateral 



triangle Phaon Una, pt. 



— Sternopleural bristles almost invariably 3 in number, arranged 



in a nearly equilateral triangle Coenosiince 



6. Sixth vein complete; hind metatarsus with strong, basal, 



ventral bristle FuceUincE 



— Sixth vein incomplete; hind metatarsus without distinct basal 



ventral bristle 7 



7. Sternopleural bristles 2 (1:1) in number; dorso-centrals always 



4 in number . Hydrotmnce 



— Sternopleural bristles 3 (1:2) or 4 (2:2) in number; dorso- 



centrals 3 or 4 in number Phaoniince, pt. 



