M 



which becomes whitish on the broad lateral parts especially on the 

 first two segments more conspicuous ; seventh segment bearing abundant 

 long curved black bristly hairs which somewhat extend on the preced- 

 ing two segments but quite sloping. 



Length: 18-21 mm. 



This handsome species is easily distinguished from the other 

 Japanese species (except T. viiyaj'ima, Ricardo.), by its distinctly 

 whitish tibiae, by its hardly separated frontal callus on the broad front- 

 al stripe, by its clear wings, by its rather broad whitish haired bands 

 or median triangles on the abdomen, and by its five rather broad 

 somewhat conspicuous grey stripes on the thorax ; and is distinguished 

 from T. miyajima by its brownish colouring, by its five or six whitish 

 median triangles, and in other minor points. 



According to the description of Bigot, T. leucosparsus may be 

 a synonym of this species, and his type might be a denuded specimen. 

 A female Kankau (Formosa, September) in the British Museum, ar- 

 ranged by Miss Ricardo, as T. leucosparsus, has no distinguished 

 characters, though it differs by a dark colouration, a fine but conspicu- 

 ous carina at the middle of the upper callus of the frontal stripe, and 

 a few irregular blackish punctuations at the pleurae which are denuded. 

 I could not separate it from T. sanguineus, Walker, and if her identi- 

 fication is correct there is no doubt that the species is the same as 

 the latter. 



This fly has rather a wide distribution, as I have records from 

 Java, Federate Malay States, Sumatra, Burma, Assam, China, and 

 Formosa, but it is rather a rare species in the Island of Formosa and 

 its occurence is quite restricted to the southern parts from Takao to 

 Koshun, where it emerges during June and July. I took only two 

 females on the road near the sea shore of the Bosan district, about 

 four o'clock in the afternoon. The male is not known yet. 



