67 
South Carolina, and Montana (Colls. Am. Ent. Soc. and U. S. Nat. Mus.), 
and eight bred specimens, including Norton's type specimen of similar is 
(Coll. U. S. Nat. Mus.). Forbes's N. robinice, the type of which I have 
examined, is undoubtedly a light-colored specimen of this species. It 
differs in lacking the black on the anterior lobe of the mesonotum and 
the small spot beneath the anterior wings. 
34. Pteronus magus new species. 
Female. — Length 8 mm.; very robust, stout, shining; clypeus very 
broadly and shallowly notched, lobes small, pointed; ocellar basin 
distinctly defined, sides faintly raised; crest stout; fovea elongate, 
rather deeply excavated; autenna3 longer than head and thorax, slen- 
der, tapering, joints 3, 4, and 5 subequal, fourth slightly longest; 
venation normal; stigma regularly rounded on lower margin; sheath 
broad, obtusely pointed, densely hairy at apex and on lower margin ; 
claws large, deeply cleft, rays subequal. Color of spot on head includ- 
ing ocelli extending rather narrowly over vertex, large spot on anterior 
lobes of mesonotum, spot on apex of scutellum, metanotum, and abdo- 
men dorsally for the most part black; head except as noted, pronotum, 
entire venter, the lateral edge of abdomen dorsally, more or less of pos- 
terior margin of some of the middle segments, yellowish ferruginous; 
antennae black basally; flagelluin reddish, more or less infuscated, 
especially at base above; sheath brown; veins brown, stigma and costa 
lighter, yellowish brown. 
One female. Canada, (Coll. Am. Ent. Soc.) * e — > x ~~^ ,l-<-'i-» 
35. Pteronus quercus new species. 
Female. — Length 4.5 mm.; very robust, shining; clypeus nearly trun- 
cate, vertex smooth; ocellar basin indistinctly defined, sides rounded; 
frontal crest broad, unbroken; fovea defined only on anterior margin; 
antennae not much longer than head and thorax, slender, scarcely 
tapering, third joint longest; intercostal interstitial, nearly at right 
angles to costa; venation otherwise normal; stigma very broad, ovate; 
apex of costa greatly thickened, half as broad as stigma ; sheath robust, 
densely clothed with long, whitish hairs at apex and on lower margin; 
cerci short; claws large, deeply cleft. Color of spot on vertex includ- 
ing ocelli extending back over occiput, mesonotum, metanotum, and 
abdomen except narrow lateral margin black dorsally; antennae brown- 
ish, inclined to ferruginous beneath; body otherwise pallid; legs, meso- 
epimera, border of spot on vertex, slightly inclined to reddish; veins 
yellowish brown; stigma and costa yellowish. 
One female, bred from larva found in June on oak at Ithaca, N. Y., 
by Mr. Trelease. Adult emerged March 22. (Coll. U. S. Nat. Mus.) 
This insect may fall in the genus Pontania. 
36. Pteronus hyalinus new species. 
Female. — Length 7 mm. ; rather robust, shining; clypeus very broadly, 
but not deeply. emarginate; ocellar basin with distinctly defined walls; 
