1864.] 
385 
and the cheeks clothed with long, rather dense yellowish-white hairs; 
vertex sparsely clothed with short pale hairs. Antennae black. Tho¬ 
rax convex above, rounded in front, black, densely and finely punc¬ 
tured, somewhat shining, clothed with long whitish hairs which are 
sparse on the upper surface; metathorax more finely punctured, with a 
deep longitudinal impressed line on its disk. Wings subhyaline, faintly 
clouded on their apical margins^ nervures fuscous. ^Legs rather long, 
black, punctured, shining, clothed with rather short pale hairs; femora 
and tibiae robust, subclavate, the latter short, especially the intermediate 
pair; tarsi nearly as long as the femora and tibiae put together, clothed 
beneath with dense short yellowish pubescence; claws bifid. Abdomen 
elongate, cylindric, finely and densely punctured, black, shining, very 
sparsely clothed with short whitish pubescence, which is more dense 
toward the tip; apex very much incurved, apical margin rather broadly 
compressed and somewhat produced; anterior and posterior margins of 
the segments above compressed, the basal segment rounded and convex 
in front; ventral segments flat, the basal plate margined posteriorly by 
a semicircular, well defined carina, on the disk of this plate a small bifid 
tubercle; on the third or fourth ventral segments there are two oblique 
tubercles, one on each side of the disk ; margins of the segments cili¬ 
ated with pale yellowish'-hairs; last ventral segment forcipate, piceous, 
and fringed with long yellowish hairs. Length lines. 
Female. —Unknown. 
Hah. —Connecticut. One specimen. Coll. Mr. E. Norton. 
ALCIDAMEA, nov. gen. 
Head transverse, as wide as the thorax, ocelli placed in a curve on the ver¬ 
tex ; antenncE (% ) half as long as the thorax, scape rather long and very robust, 
slender at base, joints of the flagellum compressed, submoniliform, of nearly 
equal length, slightly attenuated towards the tip, apical joint suddenly con¬ 
stricted into a slender curved spine, rather acute at tip. Labial palpi four- 
jointed, the two basal joints elongate, slender, the second joint about one-third 
longer than the basal, the two apical joints minute, placed at the apex of the 
second joint. Maxillary palpi four-jointed, the first two joints robust, the basal 
joint short, about half the length of the second, the third and fourth joints 
more slender, cylindric, the third about twice the length of the apical joint j 
lobe of the maxilla very long, slender and much curved. Saperior wings 
with one marginal and two submarginal cells, the second submarginal cell 
receiving the two recurrent nervures. Abdomen subovate, convex above; 
slightly incurved in the males, and the second ventral segment more or less 
produced on the disk. 
