FORMOSAN AGROMYZIDAE. 
817 
two pairs directed inwards; orbits otherwise bare; width of each orbit 
less than half the width of central stripe, the bristles situated near to the 
eye margins ; profile as fig. 8 ; arista very short, not longer than the width 
of the frons at the anterior margin, bare; eyes bare. Mesonotum with 2 
distinct pairs of dorso-centrals, and in front of the anterior pair a series 
of setulæ, the most posterior of which is stronger than the others, and 
may be in some cases strong enough to rank as a dorso-central, in which 
cases the anterior setuïæ will also be correspondingly increased in size; 
disc with numerous short hairs, about 8 rows between the dorsocentrals ; 
no differentiated bristles between the posterior dorso-centrals. Abdomen 
subovate ; ovipositor distinctly protruding, rather short and flattened. 
Legs moderately stout; mid tibiae without discernable bristles. Wing as 
fig. 4. 
Length: L25. 
Locality: Pilam, August, 1912. 
Allied to A. gyrans Fallen, but readily separated by the yellow 
palpi, which are exceptionally small, and the pale frons as well as other, 
minor, characters. 
6. Agromyza longipennis Loew, var. nigricoxa n. var. 
This variety differs from the type form in having the apex of the 
second joint of the antennæ clear yellow, contrasting sharply with the 
black base; the vibrissa less distinctly differentiated; and the fore coxæ 
blackened instead of yellow. 
Longipennis Loew is very closely related to geniculata Fallen, the 
differences between which and the former I have pointed out in my recent 
paper on the genus Agromyza, in the Annals of the Entomological So¬ 
ciety of America, voi. 6, 1918, No. 3. The pubescence of the arista in the 
form here listed is much less distinct than in the type form is, and possibly 
the examination of more material may result in the elevation of the former 
to specific rank. 
Three specimens, Takao, May 3, 1907. 
7. Agromyza brunnifrons n. sp. 
Female: Black, shining. Frons black-brown, becoming black above 
the lunule ; orbits shining, center stripe opaque ; lunule yellow ; antennæ 
black-brown, apex of second and base of third joints yellow ; arista brown ; 
face and cheeks pale yellow; proboscis and palpi yellow. Disc of mesonotum, 
scutellum, and pleuræ shining black, with slight indications of gray polli- 
