558 
CHARLES T. BRUES. 
luteous ; the legs and plenræ brownish yellow, but the anterior tarsi 
considerably lighter. Head seen from above slightly narrower than the 
thorax, twice as wide as thick ; rounded on the sides and much more 
sharply so medially in front ; its posterior margin slightly concave. 
Ocelli present, forming a large equilateral triangle, the lateral ocelli 
equidistant from each other and the sides of the head. Anterior margin 
of the front between the antennæ with two pairs of nearly porrect 
bristles; each side along the margin when seen from above with two 
dorsal view. 
approximate bristles directed medially ; 
disk in vertical view with a bristle on 
each side halfway from the median ocel¬ 
lus to the margin ; posterior margin 
with four reclinate bristles. Eyes small, 
oval, angled below at the posterior cor¬ 
ner; about one fourth as long as the 
lateral view. 
head height. Antennæ small, rounded, pale yellow; arista stout at the 
base. Palpi of moderate size, weakly bristly. Proboscis short, fleshy. Me- 
sonotum about three times as broad as long, with a long stout, porrect 
macrochæta on each side just below and before the posterior angle ; 
hind edge with six equidistant reclinate bristles. Metathorax more or 
less visible from above ; dark colored in front and medially, but pale 
behind on the sides; sharply declivous. Pleuræ bare, except for the 
large bristle below the edge of the mesonotum, previously mentioned. 
Abdomen with four heavily chitinized plates, the first very narrow, 
almost linear ; second the largest, half as long as broad at apex ; third 
only two thirds as long as the second and slightly broader; fourth, 
