830 DIPTERA OF AUSTRALIA, 



Genus 19. Lechria, gen.nov. 



Two sub-marginal cells, the first very short, sub-triangular ; 

 four posterior cells ; no marginal cross-vein^ but inner marginal 

 cell closed by first longitudinal vein, which ends at inner end of first 

 sub-marginal cell ; small cross-vein situated some distance before 

 inner end of second sub-marginal cell ; prsefurca originating beyond 

 the middle of the wing ; discal cell closed, elongated, its inner half 

 cuneate, and its inner end situated before origin of prcefitrca ; 

 wings glabrous. Antennae 16-jointed, short. Feet long, slender ; 

 tibiae with spurs ; ungues small, smooth ; empodia indistinct. 

 Male forceps with two horny appendages ; an outer linear one, and 

 a longer somewhat hooked inner appendage ; also five long, horny, 

 needle-like processes of the internal apparatus (PI. xxiv., fig. 58). 



Rostrum nearly half the length of the head ; palpi of moderate 

 length, the first joint apparently slightly the longest, the last three 

 rather thicker, equal. The antennae little longer (if any) than the 

 head ; joints of scapus somewhat thick, sub-cylindrical, the first 

 rather longer than the second ; flagellar joints sub-cylindrical, 

 with very short hairs. Eyes contiguous above, and almost so on 

 the under side. Collare inconspicuous. Legs clothed with only a 

 microscopic pubescence. Wings very cuneiform ly narrowed 

 towards the base, with only a slight anal angle ; appearing covered 

 with microscopic dots only under a high power ; the veins at apical 

 end of wings densely beset with minute hairs ; stigma narrow, 

 elongate, enveloping terminal portion of first longitudinal vein. 

 The tip of auxiliary vein is opposite the end of praefurca and the 

 small cross-vein ; the sub-costal cross-vein at its tip ; praefurca very 

 short, originating at an angle; the first longitudinal gently 

 arcuated into the second longitudinal, joining at the base of its 

 fork ; the first sub-marginal cell is very short ; the anterior branch 

 of the second longitudinal fork about half the length of the 

 posterior, the latter converges towards the tip of the third longi- 

 tudinal, and is equal in length to the petiole ; second sub-marginal 

 cell also with a short petiole ; the small cross-vein situated a little 



