144 
WILIJA.Ar J. FOX. 
eyes downwards, clieeks, sutures Iietween collar and dorsuluin, line on pleuruin 
and the metathorax posteriorly, with silvery puhescence. Thorax shining, with 
fine separated punctures; scutelluin and postscutellum medially impressed; 
metanotnm finely punctured, with a strong excavation posteriorly, from which 
begins a deep sulcus, extending down to the apex of metathorax, the posterior 
face strongly rugose; wings hyaline, the apical margin slightly fuscous, tuhial 
si)urs whitish. Abdomen shining, the first and second segments petioliform, the 
first segment about one-third longer than the second, with two transverse tuber- 
cles near the base above. Length .40 inch. 
'J, . — Differs from the 9 follows: Antenme thickened toward the apex, the 
first joint of the flagellum nearly twice the length of the following joint ; space 
between the eyes at top equal to the length of the second and third joints of the 
autenuffi united, beneath it is less than the length of the first joint of the fla- 
gellum. Length .3.5 — .40 inch. 
Occurs from New York to Florida. 
Can be at once distinguished from trklentation by liaving tlie met- 
anotnm punctured. 
12. Trypoxylon tri<leiitatiiiii Pack. PI. iii, fig. 4. 
T. tridentatum Pack., Proc. Eut. Soc. Phila. vi, ]). 417, 9i 1867. 
9 . — Front with strongly separated imuctures, rather deeply impre.ssed me- 
dially, the impression extending from the lower ocellus to a very strong pro- 
jection above the an ten nffi ; vertex impressed medially; clypeus very strongly 
carinated on its anterior half, emarginate luedinlly, the sides of the emargination 
produced into a slight tooth; mandibles obscurely rufous; the second joint of 
the flagellum more than half the length of the pireceding joint, the second and 
third joint nearly equal ; space between the eyes at vertex less than the length 
of first and second joints of the flagellum united, beneath it is about equal to 
the length of the second and third joints of the flagellum ; eyes from the emai- 
gination to the vertex with a strong margin ; from the emargination of the eye 
downwards, thorax on the sides and beneath, and the sutures of the thorax with 
silvery pubescence. Thorax shining, finely and distinctly punctured ; dorsuluin 
very slightly impressed laterally; scutelluin and postscutellum not impressed 
medially; metathorax transversely striated, above with two strong, curved, 
converging carinse, with a medial impression, the furrow extending down to the 
apex of, and is much stronger on, the posterior face; wings hyaline, the apiical 
margin fuscous, the nervures blackish; legs with sericeous pile, the posterior 
tarsi whitish medially, the anterior tibiie rufous at base; first and second seg 
meuts reddish, the former black above, and about one-fifth longer than the 
second, which is very slightly raised at base; the remaining segments above 
with silvery jiile in certain lights. Length .45 — .55 inch. 
. — First joint of the flagellum more than twice the length of the succeeding 
one, the apical joint slightly longer than the three pireceding ones united ; front 
scarcely impressed; the carinse on the metathorax strongly projecting. Length 
.50— .55 inch. 
Occurs throughout the United States. Speciineiis from New York, 
Te.xas, Montana, California. 
