FORMOSAN AGROM YZID Ali. 
823 
as long as the penultimate section ; and the last section of the fifth is about 
three fifths as long as the penultimate section. 
Length : 8 mm. 
Locality: Sokotsu, May, 1912. One specimen. 
15. Agromyza obtusa n. sp. 
Male: Glossy black. Frons opaque black, orbits and frontal triangle 
glossy black, with a slight greenish tinge ; frontal lunule white pollinose ; 
.antennæ, arista, and palpi, black, proboscis brown at apex. Mesonotum and 
pleuræ with a blue-green tinge, which at some angles presents a violaceous 
shade. Abdomen glossy black, the surface metallic, in some lights bronzy, 
in others with a violaceous tinge on a greenish-blue ground. Legs shining 
black. Wings clear, veins brown, yellowish at their bases. Squamæ white, 
fringe concolorous. Halteres black. 
Frons very slightly over one third the width of head ; frontal triangle 
broad and well defined, its sides gradually converging anteriorly, and 
slightly convex; orbits distinct, with slight swellings at the bases of the 
bristles ; 4 pairs of orbitals present, which are very stout and decrease but 
little in strength anteriorly, the anterior 2 pairs directed inwards, the 2 
posterior pairs directed backwards ; antennæ of moderate size, second joint 
with the dorsal bristle distinct, third joint rounded; arista slightly tapering 
at base of last section, the pubescence distinct, very fine, and not closely 
placed; eyes pubescent, a small area on the upper surface very distinctly 
haired ; cheek almost linear, slightly higher on the posterior half, marginal 
hairs very numerous, but not strong, the vibrissa not differentiated. Meso¬ 
notum with 2 pairs of strong dorso-centrals, and sometimes a weak pair 
of setulæ in front of the anterior pair; discal hairs short and closely placed, 
8—10 rather irregular rows between the anterior dorso-centrals; no distinct 
bristles between the posterior dorso-centrals. Abdomen broadly ovate ; 
discal hairs strong and numerous, but not long; hypopygium normal. 
Legs strong, femora slightly thickened ; fore tibia with a short setula on 
the posterior surface at about the middle ; mid tibia with the two posterior 
setulæ present, but not very strong. Wings of normal breadth; inner cross 
vein at, or very slightly on either side of, the middle of the discal cell ; last 
section of fourth vein about 8 times as long as the penultimate section; 
last sections of veins 8 and 4 slightly divergent ; last section of fifth vein 
aboiit three fifths as long as penultimate section. 
Length: 2-75—3 mm. 
Female : Similar in coloration to the male. Differing as follows : The 
eyes are very indistinctly pubescent ; the orbits have more distinct short 
21 * 
