2«(i 



A species near Tabanus hybridits, Wiedemann, but distinguished 

 by the wholly clear wings and black fore femora. A yellowish medium 

 sized species with a broad yellowish median stripe on the abdomen. 

 Fore head narrow. Legs yellowish, fore femora black, tibiae white. 

 Length: 17-18 mm. in the females; 17 mm. in the male. 



Female. Face yellowish with yellow hairs. Cheeks and subcal- 

 lus a darker shade of yellow. Palpi the same as these last in colour, 

 fairly stout ending in an obtuse point, with black pubescence. Anten- 

 nae bright red, the first two joints paler, with black hairs, the third 

 broad at the base with distinct tooth. Forehead about nine times as 

 long as it is broad, barely half as wide anteriorly as it is at vertex. 

 Frontal callus greenish yellow very narrow, not reaching eyes, with ,\ 

 lineal extension. Thorax covered with yellowish brown tomentum 

 and with fulvous hairs, a few black hairs intermixed. Scutellum the 

 same. Abdomen a little darker in colour, the stripe composed of 

 golden yellow hairs, which are also scattered over the rest of the 

 dorsum, but intermixed with black hairs, sides of abdomen yellow 

 hairs. Legs yellowish, the fore femora black, the fore tibiae white, 

 black at the apex, the other tibiae whitish yellow. Tarsi black, pubes- 

 cence yellow on pale parts, black on the dark parts. Wings clear, 

 veins yellowish. 



Male. It has a very large head, Atylotus-WVc, flat above, the 

 small facets occupying the lower third of the eyes and continued as a 

 narrow border to vertex. Thorax and abdomen covered with yellowish 

 tomentum and with black and some yellow hairs. Legs pale yellow, 

 fore femora black, tarsi blackish. The yellow stripe on abdomen is 

 very broad, about a third of the width of abdomen. 



This male type and a very poor female preserved in the British 

 Museum are known to me, but I have no knowledge of Formosan 

 species. This is probably a very uncommon species in Formosa Island, 

 while it is recorded from Shanghai (China) and long Son (Tongking). 



