60 
antennal joints 3 and 4 subequal, or fourth a little longer than third; 
venation normal; stigma very broad, rounded on lower margin ; sheath 
narrow, tapering; claws rather coarsely and evenly notched. Color of 
head, antenna?, anterior lobe of mesonotum, scutellurn, metanotum, 
terminal segment of abdomen, sheath, and thorax ventrally black, 
shining; hind tibiae, except basal third and their tarsi, dark brown ; 
angles of pronotum, teguhv, lateral lobes of mesonotum, abdomen, and 
legs except as otherwise noted yellowish ferruginous; clypeus and 
mouth parts except mandibles, pale; veins dark brown; wings hyaline, 
fore wings slightly infuscated below stigma. 
One female, Dyar's type. (Coif. Dyar.) 
This species was reared by Mr. Dyar from a larva collected on poplar. 
24. Pteronus auratus new species. 
Female. — Length 6.5 mm.; not very robust, shining; clypeus broadly, 
shallowly notched, lobes broad, rounded; frontal crest prominent, 
extending nearly to orbits, angulated; sides of ocellar basin very 
minutely raised: antennal fovea triangular, distinctly defined; antennae 
long, Blender, third and fourth joints subequal; venation normal, third 
cubital cell less than one-half as wide at base as at apex; stigma mod- 
erately broad, regularly rounded on lower margin; sheath narrow, 
obtusely pointed, bordering hairs very short, minute; cerci scarcely 
tapering; claws rather minutely cleft, rays subequal. Color as in cali- 
fornicus, except that the coxa' are entirely light and the bases of anten- 
n;e, spot beneath, angles of pronotum, and teguLe are whitish. 
One female. Washington. (Coll. Am. Ent. Soc.) 
This species is closely allied to californicus, but differs from it in what 
appear to be good structural characters. 
26. Pteronus californicus new species. 
Female. — Length 0.5 nun.; robust, glistening; clypeus very broadly 
and shallowly notched, lobes rather pointed; frontal crest strongly 
developed, rectilinear, extending nearly to orbits, unbroken; sides of 
ocellar basin minutely but distinctly raised; antennal fovea deep, 
broad-oval ; intercostal very oblique, anterior to basal ; second recurrent 
nearly interstitial; second transverse cubital more than one-half as 
long as third; upper middle cell of hind wings exceeding lower; stigma 
robust; sheath narrow, obtusely pointed; cerci slender, tapering; rays 
of claws unequal. Color of head, thorax, basal plates, base of first 
dorsal sclerite, and bases of coxrc black; tip of sheath, posterior tarsi, 
and wing veins, including costa nearly to base, brown; stigma lighter; 
clypeus, bases of mandibles and labrum, yellowish white; outer angles 
of pronotum, teguloe, palpi, legs and abdomen, including cerci, yel- 
lowish ferruginous; upper orbits with slightly reddish tinge. 
One female. California. (Coll. Am. Ent. Soc.) 
