FORMOSAN AGROMYZIDAE. 
325 
Female : Similar to the male in color etc. The ovipositor is 
highly glossy, and protrudes as far as the length of the last abdominal 
segment. As in the male, the frontal triangle does not reach beyond 
middle of frons, and is acute at apex. The eyes are only slightly 
pubescent. 
Allotype: Tainan, April, 1912. 
Paratypes : Yentempo, Chip-Chip, Tapani and Toyenmongai. 
17. Agromyza producta n. sp. 
Male: Black, distinctly shining. Frons opaque, orbits and frontal 
triangle glossy ; antennæ, arista, face, cheeks, palpi, and proboscis black. 
Mesonotum with a slight bluish, or greenish, luster. Abdomen glossy black, 
dorsum with a bluish luster at base, becoming violaceous on apical half; 
hypopygium black. Wings clear, veins fine, black. Squamæ whitish, fringe 
concolorous. Halteres brown-black. 
Frons slightly over one third the width of head, but little convergent 
anteriorly; triangle very distinct, elongated, the apex acute, reaching to 
well beyond the middle; orbits narrow, distinct, each about one fourth 
as wide as center stripe ; 4 pairs of orbital bristles present, the upper about 
equal in length to one third the eye height, the others slightly decreasing 
in size anteriorly, no distinguishable orbital hairs present ; antennæ inserted 
slightly below middle of profile, second joint with short, but distinct, dor¬ 
sal bristle, third joint small, rounded; arista bare, but little swollen at 
base, as long as from its base to between the 2 upper orbital bristles ; cheek 
about one fourth the height of eye, anterior angle distinctly produced, 
marginal hairs weak, vibrissa stout, but not long. Mesonotum with 2 pairs 
of strong dorso-centrals ; discal setulæ short, hair-like, very closely placed. 
Abdomen broadly ovate, surface with numerous short hairs; hypopygium 
normal. Legs rather slender; mid tibia with the posterior pair of bristles 
weak and widely separated. Wings normal in shape; inner cross vein at 
just beyond end of first vein and distinctly, though not greatly, beyond 
middle of discal cell; last section of fourth vein about 5 times as long as 
penultimate section; last sections of veins 8 and 4 subparallel; last section 
of fifth vein two thirds the length of penultimate section. 
Length: 1*5 mm. 
^Type: Pilam, August, 1912. 
Female: Similar to the male in color and size. Ovipositor highly 
glossy, much protruded, tapering, circular in cross section; wings broader 
than in the male, the inner cross vein more distinctly beyond the middle 
