1923] 
New Saw-Flies, Hymenoptera, from Oregon 
79 
middle; the collar and tegulse black; the saw-guides finger- 
shaped, bluntly pointed at middle of apex; wings hyaline, veins 
including costa brown, caudal half of stigma paler. Length, 6mm. 
Habitat: — Corvallis, Oregon; received from A. L. Lovett, 
Ballard collector. The interrupted interocellar furrow will serve 
for the indentification of this species. 
Monophadnoides corytus sp. nov. 
Male. Body black with the prothoracic legs beyond the 
middle of the femora, the knees of the other legs and beyond to 
apex, pale; clypeus truncate; antennae with the first segment of 
the flagellum distinctly longer than either of the subequal sec- 
ond or third; head and thorax setiferous; ocellar basin almost 
wanting; median ocellus surrounded by a depressed area con- 
necting with the distinct interocellar furrow; ocellar furrow 
almost wanting; vertical furrows deep, not reaching caudal aspect 
of head; wings dusky, spinulae distinct, veins and costa brown- 
ish, stigma with cephalic half brown, caudal half paler. Length, 
5 mm. 
Habitat: — Corvallis, Oregon; A. L. Lovett, collector. 
This species can be differentiated from the preceeding by the 
form of the ocellar furrow. 
Monophadnus aeratus sp. nov. 
Male. Body black and densly covered with white setae, pro- 
tibiae and mesotibiae, metatibiae except black ring at apex, and 
proximal half of the metabasitarsis, white; clypeus convex, trun- 
cate; antennae with segments of the flagellum swollen, the third 
and fourth subequal, the second longer than the third, and the 
first much longer than the second; lateral fovea wanting; ocellar 
basin deep concavity; reaching half way to the median ocellus, 
area below median ocellus flat and finely punctate; vertical 
furrows deep, bipunctiform; ocellar furrow prominent, intero- 
cellar furrow extending to the median ocellus; scutellum flat 
impunctate; wings smoky, larger veins black, smaller brownish, 
stigma of two colors. Length, 6 mm. 
