212 
Psyche 
[October 
Aphiochaeta formosana sp. nov. 
cT. Length 1.7-2. 1 mm. Head and thorax brown, the 
front blackened, except at the edges and upper corners; ab- 
domen black, dull yellow on the base of the first segment; seg- 
ments one to six with dull 3^ellow posterior margins, wider on 
four and five which have the middle portion brown; antennae 
rufous, with the tip of the third joint black; palpi yellow; 
pleurae dark brown above, lighter below; legs yellowish brown, 
the hind femora blackened at tips. Wings with a decided brown- 
ish tinge especially around the margins; venation deep brown; 
halteres pale brown, concolorous with the lower part of the 
pleurae. Front distinctW wider than high; four postantennal 
bristles, the lowei’ pair much weaker and closer together than the 
upper pair which occupy one-fifth the width of the front; inner 
bristle of lowest reclinate row on a level with the upper proclinate 
bristle and midway between it and the eye, the outer bristle well 
above it and less than half as far from the eye. Upper post- 
ocular cilium much enlarged, the others all strong and well- 
developed; cheek with a pair of strong bristles and a line of small 
ones extending to the antenna. Palpi with very strong bristles 
at tips. Antennae rather small; arista stout, pubescent, as long 
as the head-height. Mesonotum distinctly shining, with one 
pair of dorsocentral bristles; scutellum nearly as long as wide, 
with only two bristles, placed near the margin. Propleura with 
several minute bristles above and several larger ones below. 
Mesopleura bare. Second segment of abdomen with a cons- 
picuous tuft of bristles at the sides, much longer than the third; 
third to sixth gradually growing shorter. A marginal row of 
short bristly hairs on segments two to five; sixth with similar 
ones on the disc. Hypopygium small, shining, with fine bristly 
hairs below. Apical lamella large, orange yellow, sparsely hairy, 
with the two apical bristles small. Front tarsi slightly thickened, 
the second and following joints each but little more than twice 
as long as thick, the first three together as long as the tibia. 
Middle tibia with a row of very weak cilia inside the posterior 
edge; hind pair with a stronger series of about 10-12 cilia, longest 
near the middle of the tibia where they are slightly longer than 
