THE PHORIDAE OF FORMOSA. 
535 
bristle before the middle (and a second one behind the middle in one 
male) in addition to a smaller one just before the tip. All tarsi slender. 
Wings (fig. 3) longer and narrower than in any species which I have 
ever seen, almost four times as long as broad, subhyaline basally, but 
strongly infuscated at apex as well as along the anterior and posterior 
margins ; veins piceous. Costal vein barely exceeding the middle of the 
wing its cilia very short, fine and densely placed; distinctly thickened 
for most of the distance between the humeral cross-vein and the tip 
of the first vein which ends three times as far from the cross-vein as 
from the tip of the third vein ; second vein ending close to the third, 
forming a very small cell; fourth vein practically straight; fifth to 
seventh becoming more curved, the latter quite distinctly so. Halteres 
entirely pale luteo us. 
Female. Differs only by its somewhat broader front, with the 
bristles of the lower row of four curved downward medially and by 
the fifth segment of the abdomen being orange yellow. 
Described from six specimens, three of each sex from Koshun, 
Kosempo and Fuhosho, collected during March, July and November. 
This species is quite unique in several particulars and can be 
confounded with no other described species on account of its extremely 
long, lanceolate wings, with straight light veins. The absence of dorso- 
central bristles, the place of which is taken by the row of long bristles 
along the posterior edge of the mesonotum, is a character shared, so 
far as I am aware, only by the following, otherwise very different 
species. 
Phora conventa n. sp. (Fig. 4.) 
Male. Length 2*8—3T mm. Brownish-yellow ; second to fifth seg¬ 
ments of abdomen on the sides, sixth entirely, hypopygium and tips 
of hind femora, black. Head with very stout bristles. Front as broad 
as long ; honey yellow, with a black spot about the ocelli ; its surface 
