542 
CHARLES T. BRUES. 
Aphiochæta pygmæa Zett. 
There are two specimens from Takao, taken January 4 and May 15, 
1909, which are indistinguishable from European and North American 
examples of this common widespread and polymorphic species. 
Aphiochæta insulana n. sp. (Fig. 7.) 
Female. Length 1*4—1*5 mm. Deep yellow, the head black; abdo¬ 
men black, with pale yellow apical bands on the segments ; hind tibiæ 
black at tips. Head of the usual form, with median frontal groove and 
ocellar tubercle. Front quadrate, subshining ; black above and piceous 
below, its surface sparsely clothed with fine hairs, and faintly polli¬ 
nole ; lower margin with four well-developed median proclinate brist¬ 
les, the lower pair a little shorter and somewhat closer together than 
the upper pair; each lower corner with two reclinate bristles, equi¬ 
distant from each other, the eye and the lower frontal margin ; middle 
transverse row of four equidistant bristles, straight, the lateral bristles 
close to the eye ; those of the ocellar row large and strong. Antennæ 
piceous ; small, oval with a slender, bare arista. Palpi pale yellow, with 
six strong bristles below near the tip ; cheeks each with two stout 
downwardly directed macro chætæ and the sides of the face next the 
eye with a series of long bristles ; postocular cilia rather small and 
weak. Mesonotum brownish yellow, quite shining and thinly clothed with 
tine black hair, its posterior margin with a series of six bristles, inclu¬ 
ding the pair of dorsoeentrals, which are not differentiated from the 
others ; scutellum half as long as broad, with four marginal bristles of 
approximately equal strength. Pleuræ concolorous with the dorsum, the 
mesopleuræ entirely bare. Abdomen with all the segments of equal 
length except the first ; below yellowish, above black with the first 
segment and a sharply defined apical band on the segments 2—4 pale 
yellow ; its surface bare and subshining. Legs stout and rather short ; 
brownish testaceous, with the apices of the posterior femora black. 
Middle tibiæ obsoletely setulose, the hind ones distinctly but not 
strongly so, the setulæ in a single row inside of the posterior edge. 
Wings (fig. 7) hyaline with brownish thick veins and piceous thin ones ; 
oval, of rather even width. Costal vein between one-third and two- 
fifths as long as the wing, beset with short, closely placed bristles 
which gradually decrease in size from the tip to the base of the costal 
vein. First vein ending twice as far from the humeral cross-vein as 
from the tip of the third, second ending close to the third ; the cell 
