1 40 
WILLIAM J. FOX. 
curved; face, clypeus, inner orbits to the eye einargination, cheeks, and a line 
extending from the tegulje downward, hriglit silvery; second segment of ab- 
domen more strongly bent inward above, but not so strongly raised at base, tlie 
sixth and seventh segment slightly (marinated. Length .50 — .75 inch. 
Occurs in Pennsylvania, New Jersey, Virginia, Georgia, Texas, 
Illinois, Kentucky. 
This species can be at once <listinguished from either of the two 
preceding ones by its smaller size, and the thorax being clothed with 
])ale pubescence, and from clavatum Say, by not having the enclosed 
space on metanotum. It also agrees well with the figure of T. albi- 
tnrse Fab. given by Lepelitior de St. Fargeau in his Hist. Nat. Ins. 
Ilym. iii, PI. 27, fig. 3. 
4. Trypoxyloii e.x<‘avatiiiu Sm. 
T. excavatum Sin., Cat. Hyin. Brit. Mus. iv, p. 380, 1856, 9 'J, . 
9 . — Head and thorax clothed with silvery pube.scence, more dense and bright 
from the eye emarginations downward, cheeks, the sutures of the thorax, and 
the posterior face of the metathorax, laterally; front convex, opaque, subrugose, 
with a distinct medial impressed line extending from the lower ocellus to a 
strong projection above the antennie ; vertex not raised or depressed ; the ante- 
rior and posterior ocelli connected by a strong furrow ; eyes from the emargina- 
tioii upward with a distinct margin ; clypeus emarginate medially ; space between 
the eyes at top and bottom about equal to the length of the first joint of flagel- 
lum ; antennae reaching to the apex of scutellum. Thorax finely and sparsely 
juinctured, the prothorax bispinose beneath ; dorsulum with a slight medial im- 
pression extending from base to apex ; scutellum medially impressed ; meranotum 
with a shallow excavation, which becomes deeper towards the apex, and forms 
into a deep sulcus on the posterior face of metathora.x, the excavation with very 
fine transverse striations at its apex; wings hyaline, except their apical margin 
and the marginal cell, which are fuscous; legs entirely black, covered with 
.sericeous pile. Abdomen smooth, shining, clothed with sericeous pile, which is 
more obvious and silvery on the basal half of the segments ; first segment scarcely 
tumid at apex, about one-third longer than the succeeding one; the third seg- 
ment slightly concave beneath. Length .45 inch. 
% . — Differs from the 9 '’J its smaller size ; the narrower front, the space be- 
tween the eyes being less beneath than above ; the clypeus being more strongly 
emarginate, and the third segment being bituberculate beneath. Length .38 
inch. 
Occurs in Ckiba, Jamaica {Smith, Fox), New York and Illinois. 
This species can be distinguished by the silvery ornamentation of 
the head and thorax. 
.5. Trypo.xyIoii clavatum Say. PI. iii, fig. 13. 
T. clavatus Say, Bost. Jour, i, p. 374, 9 'S - 1837. 
T. clavatum Pack.. I'roc. Ent. Soc. Phila. vi, p. 414, 9- 
9 . — Front convex, strongly ])unctured, with a medial impression extending 
from lower ocellus to a projection above the antennae; anterior and posterior 
