548 
CHAELES T. BETJES. 
also black at tip ; protruding hypopygial piece yellow. None of the 
segments are noticeably elongated, but the second bears a couple of 
bristles at the lateral margin on each side. Legs short and stout, the 
posterior femora stout, but none of the tarsi thickened. Middle and 
posterior tibiæ with a series of long setulæ equalling the width of the 
stout tibiæ ; these setulæ are just inside the posterior edge, and e second 
series of smaller ones is present outside the edge, but these become 
obsolete apically. Wings (fig. 11) rather small and narrow, hyaline. 
Costal vein not or barely extending beyond the middle of the wing, its. 
cilia short and fine, but not very closely placed. Tip of first vein midway 
between the humeral cross-vein and the tip of the third vein ; second 
vein ending twice as far from the second as from the third, although 
the cell formed by the furcation is as long on the costa as the length 
of the second vein. Fourth vein faintly curved on its basal half, then 
recurved and ending nearer to the wing tip than does the fifth ; fifth to 
seventh veins nearly straight. Halteres yellow, tinged with brown. 
Two specimens from Polisha, December 1908. 
This resembles the preceeding in color and tibial armature and 
may possibly be the male of A. atriclava, but it differs so decidedly in 
the color of the halteres, venational characters, form of front, etc. that 
I do not think this possible. 
Aphiochæta latifrons n. sp. (Fig. 12.) 
Female. Length 2*2—2*5 mm. Black, the mesonotum fuscopiceous, 
and the legs dark yellowish brown. Head broad and very bristly; 
front almost twice as wide as high, convex, with a distinct ocellar 
tubercle and a median frontal line. Four proclinate bristles arranged in 
two pairs near the middle of the anterior margin of the front, of equal 
size, the upper pair nearly twice as far apart as the lower one. Next 
row of four reclinate bristles forming a pair near each anterior angle 
of the front, the median bristle of each pair not much below the lateral 
one, but nearly three times as far from the eye-margin ; next row above 
consisting of four large equidistant bristles, the lateral ones very near 
the eye margin, and the row gently curved downward medially ; ocellar 
row of bristles with the median pair approximate, nearly twice as far 
from the lateral bristles as from each other. Surface of front black, 
slightly pollino se, with small scattered bristly hairs. Antennæ piceous, 
small, subovate, with a strongly pubescent arista somewhat longer than 
the width of the head. Palpi deep yellow, strongly bristly below and at 
the tips ; proboscis much enlarged and swollen, but not produced and 
