95 
last dorsal segment, sheath, and legs yellowish white, with more or 
less brownish infuscation ; bases of coxae brown ; femora and tips of 
tibiae and tarsi brownish ; wings slightly infuscated, nearly hyaline ; 
veins, including stigma, brown. 
One female, Cresson's type. Nevada. (Coll. Am. Ent. Soc.) 
3. Pachynematus ocreatus Harrington. 
1889. Nematus ocreatus Harrington. Can. Ent. ; xxi, p. 95. 
Female. — Length 8.5 mm. ; moderately robust; head expanding some- 
what back of compound eyes; clypeus broadly, rather deeply einargi- 
nate, lobes rounded; ocellar basin with distinct and broad lateral 
walls; crest strong, unbroken; fovea shallow; antenna 4 slender, joints 
3 and 4 subequal, fifth somewhat shorter; venation normal; sheath of 
ovipositor very long and large, projecting one-half its length beyond 
tip of abdomen, apex broadly rounded, blades thin, translucent, closely 
applied; cerci very long, slender ; claws with minute inner tooth. Color 
shining resinous yellow ; antenna*, spot on either side of lateral lobes of 
mesonotum, apex of scutellum, a few indeterminate marks on metano- 
tum, and narrow border of basal plates brownish black; extreme tips of 
tibia? brown; wings hyaline, stigma paler basally, costa yellow. 
Eedescribed from Harrington's type specimen. A specimen reared 
by Mr. Harrington from larva on spruce agrees very closely with this 
species, particularly in possessing the unusually developed sheath. In 
color the legs are a little more inclined to reddish and the hind tarsi 
and tip of sheath are distinctly infuscated. (Coll. Harrington.) 
4. Pachynematus aurantiacus new species. 
Female. — Length 9 mm. ; robust ; abdomen at middle much wider than 
thorax ; head not narrowing back of compound eyes ; clypeus distinctly 
but broadly incised, lobes broad, rounded; ocellar basin with sharply 
raised limiting walls; frontal crest sharp, unbroken; fovea deep, circu- 
lar, distinctly limited ; antennae slender, about as long as head and 
thorax, tapering, third joint longer than fourth ; venation normal, except 
that the second recurrent is sometimes interstitial or nearly so; stigma 
moderate, widest at middle, regularly rounded on lower margin ; sheath 
broad, rather suddenly truncate near apex; cerci slender, not tapering; 
inner tooth of claw obtuse, remote from apex. Color orange yellow; 
inner orbits, head, above antennae except upper and posterior orbits, 
broad stripe on the anterior and lateral lobes of mesonotum, apex of 
scutellum, postscutellum, spot on either side of cenchri, metascutum, 
center and sides of the basal plates, lower half of mesoepimera, corre- 
sponding sclerite of the metathorax together with spot on mesepisterna, 
black ; extreme tips of posterior tibia? and their tarsi infuscated ; anten- 
nae dark brown above, reddish ferruginous beneath; wings hyaline; 
veins, except costa, brown ; stigma brown, costa yellow. 
