TABÁNID AE FROM FORMOSA. 
17a 
half the width anteriorly, that it is at vertex, frontal callus black, narrow, 
not reaching the eyes, its short extension nearly equal in width, ending- 
in a point. 
Thorax brownish, with a blackish brown central stripe and less 
defined lateral ones, dorsum covered with thick appressed silvery white 
pubescence, some black hairs intermixed, especially on the stripes. Scu- 
tellum the same. 
Abdomen dull blackish with black pubescence ; underside the 
same. Legs black with black pubescence. Wings tinged smoky brown, 
with white streaks in most of the cells, veins blackish brown. 
CHRYSOPS. 
1. Chrysops dispar Fabr. 
I saw specimens from Lake Candidius (X. 1907), Kagi (10. VIII. 
1907), Koroton (IX. 1907), Takao (12. X. 1907), Koshun (III. 1908), 
Suihenkyaku (VIII. 1908), Tainan (VI. 1912) and Anping (VI. 1912). 
2. Chrysops sinensis Walker. 
I have identified spécifiions from Kagi (10. VIII. 1907). 
• k&d A »• •! C :.ídí » li • 1 ' ' ''X Î ' '■ ' ' ;■ V:*; ' ; , . 
SILVIUS. 
1. Silvius formosensis n. sp. cf $ . 
Type (male), Type (female) from Toyenmongai, Formosa. 
A small reddish yellow species allied to Silvius indianus Ricardo 
(Records Indian Museum, IV, p. 374, 1911), but distinguished by the 
absence of black stripes on the abdomen and by the darker coloured 
tibiæ and tarsi. Length 8—9 mm. 
Face wholly reddish yellow, with some yellowish hairs on its lower 
part. Palpi same colour, in the female long and narrow, in the male 
club shaped with yellow hairs. Antennæ reddish yellow, the first two 
joints more pale yellow with pale hairs. 
Forehead in female broad, the same width throughout, the very 
small frontal callus hardly distinguishable. Ocelli on vertex. Eyes in 
male with the large facets occupying the upper two thirds of surface. 
Thorax and abdomen reddish yellow, the former with three dark 
brownish short stripes. Legs yellowish brown, the femora and coxæ 
yellow, pubescence on the pale parts yellow on the dark parts brownish. 
Wings clear, veins brown. 
