NORTH AMERICAN HYMENOPTERA. 
]39 
subclavate, the first joint of the flagellum doable the length of the following 
joint, the apical joint as long as the four preceding ones united ; space between 
the eyes at top equal to the length of the first two joints of the flagellum united- 
beneath the distance is distinctly less. Thorax finely punctured ; collar deeifiy 
and transversely sulcate ; suture between the collar and dorsulum not widely 
separated; dorsulum with a longitudinal, impressed line on each side near the 
tegulae : scutellum with a strong medial impression, the postscutellum feebly so. 
metathorax as in the preceding species, except that the posterior face is rugose : 
wings brownish black, without violaceous reflection, hyaline at base: posterior 
femora beneath, before the apex, with a strong lamina or swelling, the posterior 
tarsi whitish medially ; the medial and posterior coxse are excavated above. 
Abdomen smooth, the first segment as long as the two following ones united 
much broadened at apex, beneath it is armed with a long hook or curved spine 
(see fig. 12), before the apex above with a transverse impression ; the base of the 
third segment beneath depressed; the second to seventh segment beneath with 
a few long stifiT hairs. Length .60 —.80 inch. 
Occurs in Pennsylvania, South Carolina (Kohl) ; Georgia, Florida, 
Iowa. 
This species closely resembles the preceding, but can be distin- 
guished by the strongly sinuated clypeus and the posterior face of 
metathorax being rugose. 
3. Trypoxyloii albopiloisiiiii n. sp. PI. iii, fig. 2. 
9 . — Black; head and thorax clothed with cinereous pubescence; front con- 
vex, subopaque, with strong, close punctures, or being slightly subrugose; vertex, 
when seen from the front, notched medially, with two lunate tubercles, which 
connect between the posterior ocelli ; the ocelli connected by a furrow, which 
extends down to a slight projection above the antennae. ; eyes from the emar- 
gination to the vertex with a distinct margin ; face, cheeks and clypeus with 
bright silvery pubescence; clypeus anteriorly strongly carinated, the anterior 
margin medially slightly incurved (see fi«.) ; first joint of flagellum not double 
the length of tlie succeeding one, the second and third joint about equal. Thorax 
finely punctured ; collar not transversely sulcate ; dorsulum with an impressed 
line near the tegulae ; scutellum and postscutellum impressed medially: meta- 
thorax above and on the sides finely punctured, the posterior face with strong 
transverse striations, strongly sulcate medially, the metanotum before the apex 
with a shallow depression, which is finely and transversely striated ; legs sparsely 
clothed with sericeous pile, the posterior tarsi whitish, except at base and apex; 
anterior win^s fuliginous, except extreme bnse, which is hyaline, the posterior 
wings hyaline, except their apical margin, which is fuscous. Abdomen smooth, 
shining, with sericeous pile, first segment nearly as long as the two following 
combined, with two transverse tubercles near the base above, second segment 
when seen from the side, with the upper surface bent inward and strono-lv 
raised or swollen at l>ase; last segment above with as light carina, medially, 
clothed sparsely with long brownish hairs. Length .75 inch. 
Space between the eyes at top equal to the length of the first joint of 
flagellum, beneath it is only but slightly wider than the length of the second 
joint; clypeus not or but slightly produced, the anterior margin medially in- 
