348 THE AMERICAN NATURALIST. [VoL. XXXV, 
to first and second together ; the terminal slender portion not very distinct 
from the third joint, distinctly plumose. Eyes slightly smaller than second 
antennal joint, oval, with about twenty facets. Palpi rather slender, arcuate 
near base, as long as the front, bearing six 
strong macrochete laterally and a few other 
weaker ones. All of them, especially the 
larger ones, distinctly and finely hairy. 
Thorax smaller than the head when 
viewed from the side and longer than high, 
the suture between the pro- and mesothorax 
distinct above on the Spira prothoracic 
stigma distinct (Fig. 9, 7). Mesopleure 
distinctly cadi. areolated below. 
ings a little longer than the thorax, slen- 
der, flat, and obtusely pointed at tip; 
. covered on the dorsal side with short bristly 
hairs. Dorsum with six macrochete : two 
small humeral, two larger post-humeral, and 
Metathorax small, concealed to a great 
extent by the abdomen, which extends over 
it almost to the meso-metathoracic suture ; 
viewed from above through the abdominal 
wall, it appears elongate, subtriangular, and rounded at the apex. Legs 
rather stout, especially the coxze and femora. Anterior coxa two-thirds as 
long as the femora and freely movable at base; the four posterior ones 
more or less connate and not 
solarge. Posterior metatarsi 
enlarged and flattened, bear- 
ing six transverse rows of 
stout bristles (Fig. 9, c). 
One well-developed spur on 
posterior tibia. Legs every- 
where covered with short 
hairs 
Abdomen elongate, oval, 
acuminate, capable of being 
exserted at the tip, so that 
the last three segments may 
be retracted into the abdo- Tec pos See sheet t 
men or pushed out for a is 
distance equal to one-half that of the remainder of the abdomen. 
retracted it is about twice as long as the head and thorax taken together. 
It is almost wholly membranous, only the very small dorsal plates 
being chitinized. First dorsal plate trapezoidal, as wide as long, and 
Fic. 6. — Ecitomyia wheeleri, n. sp 
Female, dorsal view. 
