536 
CHARLES T. BRUES 
sparsely punctate and black hairy. Lower pair of frontal bristles close 
together at the middle of the anterior margin ; next row above of four 
large equidistant bristles, the lateral ones nearer to the eye than to the 
adjacent ones of the median pair; next row with four bristles, curving 
upwards medially to a slight extent and with the lateral bristles quite 
close to the eye ; occipital row as usual. Ocelli close together in a 
triangle ; no ocellar tubercle ; the upper margin of the front very little 
curved. Antennæ yellowish brown, small, short ovate, with a nearly 
bare arista one third longer than the head-height. Proboscis very short ; 
palpi of moderate size, deep yellow, with stout bristles at their tips. 
Postocular cilia of moderate size, except three or four above the middle 
of each eye which are much lengthened; cheeks each with two very 
stout bristles. Dorsum of thorax sub-shining, thinly clothed with fine 
black pubescence ; no dorsocentral macrochætæ, but the posterior mar¬ 
gin of the mesonotum bears three or four pairs of bristles, stronger 
laterally. Scutellum nearly four times as broad «s long, with four stout 
marginal bristles. Sides of mesonotum with a few bristles ; pleuræ bare. 
Entire thorax brownish yellow. Abdomen yellow; second segment with 
a small black spot at each side ; third to fifth segments with similar 
spots, becoming larger posteriorly and nearly meeting on the fifth, but 
leaving the entire posterior margins pale ; sixth segment with a broad 
median black crossband. Hypopygium black, its lamella yellow, except 
at base which is black ; second and sixth segments elongated, especially 
the former, which bears no bristles at the sides. Legs somewhat stout, 
the hind femora one third as broad as long, entirely brownish yellow, 
the tips of the posterior femora black. Anterior tibiæ with a single 
bristle on the outer side just before the middle ; middle tibiæ with a 
pair of bristles on the hind side at the basal fourth and another single 
one on the outer side just before the apex which bears one long and 
one very short apical spur ; posterior tibiæ with a series of three rather 
short equidistant bristles on the outer side, just outside of the hind 
edge, one at the basal fifth, another before the middle and the third 
just beyond the middle, and in addition with three smaller ones just 
outside the front edge, one opposite the second bristle of the other 
series, another at the middle of the tibia, and the third at its apical 
fourth. Tarsi all long and slender. Wings (fig. 4) distinctly yellowish, 
with fuscous veins. Costal vein not quite attaining the middle of the 
wing, with very short, fine and quite densely placed setulæ ; third vein 
bare. First vein ending over three times as far from the humeral cross¬ 
vein as from the tip of the third ; fork of third vein opposite the tip 
of the first, the second vein running nearly parallel with the third and 
