FOBMOSAN ACJROMYZIDAE. 315 



in size anteriorly ; antenna; rather small, third joint rounded ; arista slightly 

 thickened, bare, and as long as length of frons ; head in profile as fig. 6 ; 

 Mesonotum with 2 pairs of strong and 2 pairs of much weaker dorso-cen- 

 trals, the third and anterior pairs the weakest, the former being close to 

 the suture ; very few hairs on disc, no bristles discernable between the 

 posterior pair of dorso-centrals ; scutellum with four subequal bristles. Legs 

 normal; no distinguishable bristles on mid tibia. Wing venation as fig. 5. 



Length: r25 mm. 



Locality : Tainan. One specimen. 



3, Agromyza flavofemorata n. sp. 



Male: Black. Head yellow, vertex, ocellar region and back of head 

 black, orbits darkened posteriorly, becoming yellow anteriorly ; third 

 antennal joint reddish, the basal joints clear yellow ; arista black-ln'own ; 

 palpi and proboscis yellow. Mesonotum and scutellum glossy black ; pleura? 

 brown-black, opaque ; postnotum black, becoming yellow just below the 

 scutellum. Abdomen glossy black on dorsum, yellowish on venter; hypo- 

 pygium black. Legs yellow, apices of tibiae slightly, and the tarsi more 

 distinctly lirowned. Wings clear, veins black, the base of wings yellowish. 

 Squama; yellow. Halteres yellow. 



Orbits with four pairs of bristles, which decrease slightly in strength 

 anteriorly, ()rl)its wide, each al:)out equal to half the width of the central 

 stripe, very few weak hairs on the orbits in addition to the bristles; head 

 in profile as fig. 7 ; arista with close and short pubescence ; vibrissa slightly 

 differentiated. Mesonotum with very slight grayish pollinosity on sur- 

 face; 4 pairs of dorso-centrals present, the 2 anterior pairs weak; about 

 three row^s of weak hairs between tlie dorso-centrals anteriorly, and no 

 bristles between the posterior pair of dorso-centnils ; scutellum with 4 

 sul)e(|ual lu'istles. Abdomen elongate, cylindi'ical : hy])()])ygium slightly 

 over the normal size; all abdominal segments covered with short hairs. 

 Legs rather slender; mid tibia without distinct bristles on the posterior 

 surface. Wing as fig. L5. 



Length: 1-75. 



Locality: Polisha. One specimen. 



4. Agromyza formosensis n. sp. 



Male: Yellow, subopatjue. Head pale yellow, back of head, vertex, 

 and ocellar region grayisli, central stripe reddish yellow ; third antennal 

 joint with a large reddish-brown mark at the insertion of tlie arista, re- 



