13 



2. Medium-sized species, with a large shining callus on the frons . . 

 dorsahs Coq. 



1. Silvius farmosierss. RicarJo. (PI. I, fig. i.) 



(Tahv;i n-H i mo- A lm,) 



■ 



Ann. Mus. Hungarici, vol. XI, Pars I, p.. 173, ,19 \ 3. 



A small handsome yellow fly, with infumate large wings. 

 Smallest species of Tabanidae from Japan. 



Femak. Frons slightly narrower than one-third the width of 

 the head, a little longer than width, somewhat flat but not flush with 

 the eyes, almost parallel-sided and inconspicuously broadened just 

 above the antennae ; callus entirely absent, orange yellow ; pubescence 

 on the frons somewhat brownish yellow, being longer towards the 

 vertex and shorter towards the sides but quite absent near the antennae. 

 Face arched, orange yellow, bearing a brownish deep pit on each side 

 of the middle part of the face, and with a brown oblique stripe between 

 the face and jowls ; pubescence of the face yellow, but quite absent 

 near the antennae and becoming longer towards the mouth-edge and 

 jowls. Vertex slightly elevated at the middle, orange yellow, clothed 

 with rather short yellowish pubescence which becomes shorter towards 

 the middle ; three rather large ocelli blackish brown and placed on 

 each point of a triangle. Back of the head orange yellow, bearing 

 yellowish pubescence. Proboscis yellow, slightly tinged with brown, 

 shining on the blackish sucker-flaps, and bearing very shart yellowish 

 pubescence except for a few brownish hairs beneath each sucker-flap ; 

 palpi, reddish yellow, lying against the proboscis and bearing a few 

 brownish hairs, longer than half the length of the proboscis. Eyes 

 quite bare, in life brilliant green, with coppery reflections varying 

 according to the light but most evident about the lower part ; facets 

 almost all equal. Antennae incomplete. 



Thorax orange yellow, paler towards the front part ; around 

 the stigmae and wing-bases somewhat reddish. Pubescence all orange 



