60 Families and Genera of 



2$. Silvery wliitc or whitish gray species witli unspotteil wings; 



posterior cross-vein wanting. . . . Phytomyzid.e 



> Reddish yellow or brownish red species, often with spotted 



wings Opomyzid^ 



C O R IJ Y L i; K I I) M. 



Neuration of the wings complete ; both posterior basal cells of 

 considerable size; auxiliary vein well-separated from the first longi- 

 tudinal vein ; first longitudinal vein bare. Whole lateral border of 

 the front bristly ; anterior border of the mouth with strong, usually 

 numerous vibrissae. Tibiaj with spurs. 



H E L O M Y' Z I D ,E. 



Neuration of the wings complete; costa bristly ; first longitudinal 

 vein not abbreviated, but bare; the auxiliary vein is often rather 

 approximated to it. Front bristly on its upper half onlj^ ; a stout 

 bristle at each side of the anterior border of the mouth. All the 

 tibiae with spurs and outwards before their tips with a more or less 

 developed erect bristle. 



S c I o M Y z I D .*:. 



Neuration of the wings complete ; two posterior basal cells of 

 rather considerable size ; auxiliary vein well separated from the first 

 longitudinal vein. < )n the lateral border of the front Viefore the 

 vertical bristles there are two bristles, one behind the other ; face 

 proportionately long without distinct furrows for the antennae ; bor- 

 der of the mouth sharp, without vibrissas. Middle tibia; with a 

 greater number of bristles at the tip ; all tlie tibiaj on the outside 

 before the tip with a small erect bristle 



P S I L I I) .!■:. 

 Body elongated, with short hairs and almost without bristles. 

 Neuration of the wings complete ; the auxiliary vein lies close by 

 the first longitudinal vein, but diverges from it at its end and runs 

 towards the border of the wing ; by a transverse fold most charac- 

 teristic in this family running from the tip of the au.xiliary vein as 

 far as the base of the third posterior cell, the outward end of the 

 auxiliary vein is obliterated ; the posterior basal cells are very large. 

 Front with only a few bristles in the neighborhood of the crown ; 

 face receding ; opening of the mouth small and with no bristles at 

 its border. Only the middle tibiae have spurs, and all the tibire are 

 without erect bristle on the outside. 



MlC ROPEZID.E. 



Body slender, elongated, with very short hairs and very scarce 



bristles. Lcgsj proportionately short; only the middle tibia; have 



spurs, these being generally very small and weak; no small erect 



bristle on thej exterior side of the tibiae. Neuration of the wings 



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