43 



bifid spot on the abdomen is extending to the fourth segment of the 

 abdomen. 



In Formosa this distinguished species is very common, through 

 almost the whole Island from Spring to Autumn, but in the southern 

 parts, we have very often found the flies during Winter. The male 

 flies are found during the day time, on the lower surface of the leaves 

 of shrubs growing on somewhat wet places and the females are found 

 usually, attacking the cattle resting in pasture or pen, in the day time, 

 and become active towards evening. It sometimes bites our back 

 through thinner summer clothes, in the evening from about five to six 

 o'clock. 



3- Chrysops sinensis, Walker, (PI. I, figs. 5 & 6.) 



CShina-3feknra-AbnO 

 Ins. Saund. Dipt., I, p. 453, 1856. 

 V. d. Wu!p, Cat. Dipt. South Asia, p. 65, 1896. 

 Ricardo, Ann. Mag. Nat. Hist. (7), IX, p. 377, 1902 ; Rec. Ind. Mus. 



IV, p. 388, 191 1. 

 Kertesz, Cat. Dipt., Ill, p. 197. 



A robust-looking yellowish species with black median oblique 

 spots on the dorsal segments of the abdomen, and sometimes the five 

 apical abdominal segments appear more black than yellow as the 

 oblique spots are very large. Thorax blackish with distinct yellowish 

 stripes ; wings with a rather peculiar narrow cross-band and with a 

 apical spot. 



Female. Head a little broader than the thorax. Frons broad, 

 very slightly divergent below, at its narrowest part occupying a little 

 more than one-thirds of the head, blackish (in a specimen caught at 

 Taihoku, 1905, yellowish brown), but densely covered with a greyish 

 yellow tomentum ; frontal callus shining black or yellowish brown, 

 large, transverse but not reaching the tycs, protuberant, its upper 

 margin very slightly arched but inconspicuously incised in the middle ; 

 occllat triangle slightly convex, moderate in size, covered with a scarce 



