42 
wanting; frontal crest sharply defined, prominent, slightly notched in 
the center; antenna! fovea very minute, almost wanting, circular; 
antennae longer than head and thorax, joints 3 and 4 subequal, joints 3 
to 5 nodose at tips; procidentia projecting more than its width beyond 
terminal segment; hypopygium narrow, rounded at tip; claws deeply 
.cleft; third cubital cell very short, quadrate; upper discal cell of hind 
wing not exceeding lower. Color black; clypeus, mouth party, angles 
of pronotum, tegula\ hypopygium, and legs, except bases of coxa', yellow- 
ish ferruginous; tips of anterior tarsi faintly and tips of posterior tibia 1 - 
and their tarsi more strongly infuscated; antennae fulvous beneath; 
veins dark brown ; stigma unicolorous, brown ; costa lighter at extreme 
base. 
Two males, one reared ( ?) from willow gall. Michigan. (Coll. U. S. 
Nat. Mus.) 
28. Pontania placenta Norton. 
1867. Xemalus plaeenlus Norton. Trans. Am. Knt. Soc.,i, p. 213. (Cat., etc., p. 75.) 
Male. — Length 4.5 mm.; not very robust, shining; clypeus very 
broadly excavated, lobes small; vertex rounded, smooth, with a deep 
furrow beyond lateral ocelli ; ridges limiting ocellar basin wanting or 
indistinct, as also frontal crest; antennal fovea large, very shallow, 
indistinctly limited; antenna' slender, not much longer than head and 
thorax; claws microscopically cleft at apex; procidentia not or scarcely 
projecting. The following veins arc interstitial : Intercostal with basal, 
second recurrent with second transverse cubital and outer veins of 
discal cells of posterior wings. Color of antenna', large spot on head 
about ocelli, occiput, mesonotuin and nietanotum, abdomen above except 
narrow lateral edge, more or less of metepisternum, and bases of pos- 
terior coxa', black ; balance of body yellowish ferruginous. 
One male. Canada. (Coll. Am. Ent. Soc.) 
29. Pontania pallifrons Cresson. 
1880. Xematus pallifrons Cresson. Trans. Am. Ent. Soc., vni, p. 6. 
Male. — Length 5 mm.; moderately robust; clypeus almost squarely 
truncate; mouth parts with short white hairs; vertex smooth, shining; 
ocellar basin distinctly defined; frontal crest rather large, unbroken; 
antennal fovea very small, circular, more deeply excavated at lower 
end; antemne not much longer than head and thorax, robust and 
tapering; claws large, deeply divided, inner ray much shorter than 
outer; apex of abdomen not strongly recurved; procidentia short, 
strongly constricted at base, apical angles acuminate; cerci rather 
long, spindle shaped; venation normal, except that the intercostal vein 
is at right angles to costa; stigma very elongate, narrow. Color black, 
shining; face below ocellar basin, orbits, pronotum, teguhe, all of 
venter, and legs yellowish ferruginous; metepisternum and extreme 
