100 
winch it agrees more nearly in point of size. The three species together 
form ti very closely allied group, and doubtless have similar habits. 
9. Pachynematus graminis new species. 
Female. — Length G.5 mm. 5 head dilated back of eyes; clypeus emar 
ginate, almost truncate; antenna! fovea distinct and breaking slightly 
through the frontal crest, the latter extending indistinctly to the orbits; 
second recurrent interstitial with the second cubital cross nerve; vena- 
tion otherwise normal; stigma evenly rounded on lower margin; 
sheath rather broad, somewhat acuminately pointed, with straight 
upper margin ; cerci very slender. Color brownish black; head yellow 
ish, except area about ocelli and bases of antennae; pronotum, teguhe, 
abdomen beneath, terminal dorsal arcs, and most of legs yellowish 
white; more or less of baseof scutellum whitish; bases of coxa 1 , extreme 
bases of femora, apices of tibiae and the tarsi brownish, or more or 
less strongly in fuscated: wings clear; veins brownish; stigma and costa 
almost hyaline. 
One female. Nevada. (Coll. Am. Ent. 80c.) 
10. Pachynematus pleuricus Norton. 
1867. Nematus pleuricus Norton. Trans. Am. Ent. Soc.,i,p.206. (Cat., etc., p. 70.) 
Female. — Length 6.5 mm.; rather robust, shining; head dilated back 
of eyes; clypeus rather shallowly and broadly emar ginate; walls about 
the ocellar basin broad and rounded, crest unbroken, fovea extending lat- 
erally over bases of antennae; antenna' slender, filiform, joints 4 and 5 
equal and longer than 3; sheath narrow, tapering, tip obtusely pointed; 
venation normal, except that the first cubital is nearly hyaline; claws 
with minute inner tooth. Color black and pallid or resinous; antenna', 
spot on vortex including ocelli and reaching to bases of antenme, large 
spot on each of the anterior lobes of mesonotum, apex of scutellum 
with spot on either side, nietanotum, tergum except tip, mesepimera 
except large lateral spot, more or less of base of venter, bases of coxa', 
trochanters, and bases of femora black; extreme tips of tibhe, particu- 
larly hind pair, and tarsi strongly in fuscated ; sheath brown; except 
as noted, resinous yellow; wings hyaline; veins brown; stigma and 
costa hyaline. 
Two females. Colorado, C. P. Gillette, collector (Coll. U. 8. Nat. 
Mus.), and Idaho (Coll. Cornell Univ.). Norton's type specimens are 
lost. 
11. Pachynematus pubescens new species. 
Female. — Length 8 mm.; robust, shining; head dilated back of eyes; 
clypeus broadly, shallowly notched; ocellar basin rather indistinctly 
detined, crest low, unbroken; antennal fovea triangular; head very 
coarsely roughened with small elevations and, together with thorax, 
densely clothed with long whitish pubescence; antennae slender, joints 
