FAMILY SCIARID.E — THE DARK WIXGED FUNGUS GNATS 



119 



KEY TO GENERA 



1. Proboscis longer than the thorax (2) Eugnoriste Coquillett 



Pi'oboscis not greatly elongate 2 



2. Wings conspicuously hairy; claws never denticulate. . .Trichosia Winiiertz 

 Wings with microscopic setulse but not hairy 3 



3. Claws toothed 4 



Claws not toothed 5 



4. Forks of the fourth vein arcuate Metangela RUbsaamen 



Forks of the fourth vein not arcuate Phorodonta Coquillett 



5. Face strongly produced Rhynchosciara Riibsaamen 



Face not produced 6 



6. Forks of the fourth vein arcuate; antennae of the male pedicellate and 



with whorls of hair (1) Zygoneura Meigen 



Forks of the fourth vein not arcuate; antennae never pedicellate 

 (Neosciara) (6, 7, Mycetophilidae) Sciara Meigen 



Sciaridaj. — 1, Zygoneura; 2, Eugnoriste. 



