546 
CHARLES T. BRUES. 
large, stout bristles ; front as high as wide on the anterior margin, but 
decidedly broader above, with ocellar tubercle, and median frontal line. 
Four proclinate bristles of nearly equal size, the lateral ones fully twice 
as far apart as the median ones, lateral reclinate bristles of the lower 
row close to the eye margin, almost above one another. Middle frontal 
row of four equidistant bristles forming a straight transverse line, the 
lateral bristles almost contiguous with the eye margin. Ocellar row 
normal, its bristles very large, nearly as long as the height of the 
front. Postocular cilia large, of even length throughout, the upper one 
on each side enlarged to half the length of the ocellar bristles ; cheeks 
each with a pair of large macrochætæ and a series of fine bristles run¬ 
ning up the inner eye-margin to the antennæ. Antennæ of moderate 
size, brownish testaceous, with a pubescent arista as long as the width 
of the head. Palpi rather small, but furnished with stout bristles and 
small ones intermixed along their entire lower edge. Mesonotum oval, 
yellowish brown, clothed with fine hairs which become longer along the 
sides behind to form a lateral bristly area margined externally by long 
recumbent macrochætæ. One pair of large, sharply differentiated dorso- 
central macrochætæ. Scutellum over half as long as broad, with only 
two marginal bristles; these 
large. Mesopleuræ clothed on 
their upper half with bristly 
hairs, and furnished with a 
single large bristle. Abdomen 
opaque black, the posterior 
margins of the first and second 
segments narrowly yellowish 
white ; none of the segments 
elongated, the second bristly on the sides. Genitalia testaceous. Yenter 
dark colored, pale yellow at the incisures. Legs rather slender, none of 
the tarsi thickened, testaceous in color, the apices of the hind femora 
black. Four posterior tibiæ setulose, with the setulæ forming a continuous 
line just inside the posterior edge and a second line just outside which 
extends only halfway to the apex. The setulæ are quite strong, espe¬ 
cially on the posterior tibiæ. Wings (fig. 10) long and narrow, with 
dark brown veins, and distinctly brownish anteriorly. Costal vein exten¬ 
ding well beyond the middle of the wing, its cilia short, fine, and very 
densely placed. First vein ending midway between the humeral cross¬ 
vein and the tip of the second vein ; second vein entering the costa at 
a distance from the third vein equal to its ov r n length, thus making a 
rather large cell at the furcation ; fourth vein but little curved, almost 
Fig. 10. Aphiochaeta atriclava , wing. 
