AQUATIC INSECTS IN NEW YORK STATE 403: 
well arched, transverse suture wanting; scutellum narrow, 
metanotum well developed; abdomen long and narrow, eight 
segmented besides the anal segment; genitalia inconspicuous;, 
legs long and slender, with fine short hairs, metatarsus nearly 
as long as the following four joints taken together; claws: 
slender, each with a single tooth on the under side; wings long 
and slender, extending almost to the margin of the eighth 
abdominal segment; the margins, and veins except the true cross: 
veins and the first anal, covered with flattened hairs. Venation: 
as in the figure; anal angle obtuse, posterior lobe prominent and. 
rounded. Halteres free. 
Pelorempis americana nov. sp. 
pl.41 
Female. Antennae when flexed downward reaches just a 
trifle beyond the outstretched palpi. The upper surface of the 
epistome is brown, yellowish on the sides, the labrum pure white. 
The labium, which is somewhat prolonged beyond the labrum 
is brown beneath; this color extends to near the lobelike tip. 
The lobes are hemispherical and pale yellow, covered with black- 
ish or dark brown bristles. Black hairs cover both the upper sur- 
face of epistome and the under surface of labium, and a few 
bristles on inner eye margin. The front is pale yellowon the lower 
part, and brown on the upper; the vertex is brown; back of head 
yellow; palpi brown, the articulations and all of the last two 
joints yellow, covered with black hairs; antennae reddish brown, 
the two basal joints and all of third joint except tip, and bases. 
of all the others pale yellow, its hairs black. Thorax yellowish 
brown; the anterior margin of thorax, a spot on each side of it, 
four dorsal stripes, and a spot over the root of each wing reddish 
brown. The dorsal stripes are wide, the median pair only sepa- 
rated by a fine line much abbreviated posteriorly; the lateral 
stripes abbreviated anteriorly. Scutellum, pleura, and meta- 
notum yellow, the latter with a triangular spot of brown 
anteriorly, which is prolonged backward into a fine median line; 
pectus reddish, or reddish brown; thorax and abdomen nearly 
bare; abdomen eight jointed plus anal segment, yellow, each 
segment with a reddish brown fascia which covers the posterior 
third of the segment, excepting its extreme edge. ‘The anterior 
margin of each fascia produced forward at the middle and the 
sides till the brown color nearly reaches the anterior margin of 
the segment. The anal appendage consists of four rounded, in 
conspicuous pieces. The venter is paler than the yellow of the 
dorsum. Legs yellow, a few small spots on the coxae, the tip 
of all femora, base and tips of all tibiae and the tarsi except the 
