216 
Psyche 
[October 
the outer bristle close to the eye and only slightly higher than the 
inner one; middle row of four equidistant bristles, the lateral 
ones very close to the eye and set distinctly higher than the 
middle ones; ocellar row of four bristles, uppermost postocular 
cilium very much enlarged, directed upward and inward, lower 
cilia somewhat enlarged; cheek with a pair of macrochaetse; a 
series of four strong bristles between them and the base of the 
antennae; antennae of moderate size, with a stout pubescent 
arista as long as the head-height. Palpi rather large, closely and 
strongly bristled. Mesonotum quite shining; with a bristle above 
the spiracle and two dorsocentral macrochaetae ; scutellum nearly 
twice as wide as long, with four large bristles behind, the lateral 
pair distinctly smaller, but still well developed. Propleura 
bristly above, along the posterior margin, and with three rather 
strong bristles just above the coxa. Mesopleura bare. Abdo- 
men with segments two to six of nearly equal length, the second, 
at the sides with a very noticeable tuft of bristles; sixth at the 
tip with a fringe of bristly hairs; all tergites fully chitinized 
Legs moderately stout, but not thickened; anterior tarsi slender 
middle tibise with a series of extremely minute cilia just inside 
the posterior edge; hind tibia with a similar series of rather 
small cilia which are stronger near the middle and weaker at 
base and apex. Costa extending just to the middle of the wing, 
with rather short, very closely placed cilia; first section slightly 
longer than the other two together; second three times as long 
as the third, the second vein leaving the third at a very acute 
angle, so that the lower side of the cell is twice as long as the 
upper; fourth vein curved at the base, but almost straight 
beyond, originating distinctly beyond the fork of the third vein; 
fourth and fifth very slightly sinuous; seventh faintly curved; 
wing large and rather narrow. Halteres brownish yellow. 
Type from Tiahoku, Formosa, April 1912 (Sauter). 
This species resembles A. humeralis Zett, but differs in the 
weak cilia of the hind tibia, very much higher front and non- 
thickened costa. From A. ruhricornis Schmitz it differs by the 
absence of the lower postantennal bristles, weaker cilia of the 
hind tibiae and in the course of the fourth vein. From A. errata 
Wood it differs by the longer first costal division and absence of 
