NORTH AMERICAN HYMENORTERA. 
U3 
Occurs ill Ciuiada, and at Beverly, Mass. It is larger than eitliei 
of the two following sjiecies, to which it is related. 
9. Ti*.v|»oxyI«m IVigitliini Sm. 
T.fngidum Sm.. Cat. Hym. Brit. Mas. iv, p. 381. 1856, ?. 
T.frUjidnm Pack.. Proc. Eiit. Soc. Phila. vi, p. 415, 1867, %. 
9. — Front coriaceous, sliglitly rouglienert, with an impre.ssed line extending 
from lower ocellus, which is situated in a pit, to a strong frontal projection above 
the antennje: clypeus with a large quadrate tooth medially; first and second 
joints of the flagellum about equal ; space between the eyes at the top equal to 
the length of the first and second joint of the flagellum united ; beneath, it is a 
little less: face, clypeus, cheeks and the thorax on the sides and beneath with 
silvery pubescence. Thorax with exceedingly fine imnctures; the collai with a 
transverse sulcus, which is interrupted medially ; dorsulum with an impressed 
line on each side near the tegulm ; scutelluin and postscutellum not impressed ; 
metanotum with strong, slightly oblique striations, wuth a slight medial ini])ies- 
siou ; posterior face of metathorax with a strong sulcus, which is very broad and 
dee]i at the base; w’ings hyaline, their apical margin slightly fuscous, tegula" 
and mandibles ferruginous; legs black, with sparse silvery pile, the tarsi fuscous, 
the tibial spurs reddish brown or whitish. Abdomen smooth, shining, the fiist 
segment strongly sulcate above, on its basal half, and is about one-thiid longei 
than the succeeding segment. Length .30 inch. 
^ ^ Oitfers from the 9 bv having the last joint ot the antennai as long as the 
three preceding ones united ; the clypeal tooth is indistinct, and the wings are 
strongly iridescent. Length .30 inch. 
Occui’s front Hudson’s Bay (feniitli) to ^ irginia, wostwaid to ^It. 
Hood, Oregon. 
10. Try poxy Ion bidentatiiiii n. sp. PI. iii, fig. 9. 
j .—Closely resembles the preceding species, hut is distinct by having the cly- 
peus bidentate medially ; the second joint of the flagellum shorter than the first ; 
the metathorax strongly sulcate above and on its posterior face ; the tihial spins 
black ; the wings are strongly iridescent, fusco-hyaline. Length .25 .30 inch. 
. The apical joint of the antennm as long as the four ]ireceding joints 
united ; the first segment is more linear than in the 9 ■ clypeal teeth not 
.so distinct. Len,gth .25 inch. 
Occur.s with the preceding. 
11. Trypoxylon rubrocinrtuni Pack. PI. iii, fig. 7. 
T. rubrocinctum Pack., Proc. Ent. Soc. Phila. vi, p. 416, 9 • 1867. 
Front convex, rugosely punctured, with a medial impressed line extend- 
ing from lower ocellus to a strong projection above the anteuiiie; vertex de- 
pressed medially; clypeus strongly emarginate ; first joint of flagellum a little 
more than one-third longer than the second joint; space between thee.ves at the 
vertex equal to the length of the first joint of the flagellum, beneath it is a little 
less; eyes from the emargination upward with a distinct margin ; mandibles, 
tegulie' femora at apex, the tarsi at base, and the basal half of the second seg- 
ment above, and beneath entirely reddish fulvous; from the emargination of the 
