FORMOSAN AGROMYZIDAE. 317 



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 setulse, the most posterior of wdiich is stronger than the others, and 

 may be in some cases strong enough to rank as a dorso-central, in which 

 cases the anterior setulfe 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: 1"25. 



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 anteimse clear yellow, contrasting sharply with the 

 black base; the vibrissa less distinctly differentiated; and the fore coxae 

 blackened instead of yellow. 



Longiyennis 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, vol. 6, 1913, No. 8. 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 8, 1907. 



7, Agromyza brunnifrons n. sp. 



Female: Black, shining. Frons black-browir, becoming black above 

 the lunule; orbits shining, center stripe opaque; lunule yellow; antennae 

 black-brown, apex of second and base of third joints yellow ; arista brown ; 

 face and cheeks pale yellow ; prol)oscis and palpi yellow. Disc of mesonotum, 

 scutellum, and pleurae shining l)lack, with slight indications of gray polli- 



