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4, Pteronus longulicornis Norton. 
1835. Nematus longicornis Say. Boston Journ. Nat. Hist., 1, p. 219. 
1859. Nematus longicornis Say. LeConte, Say’s Entomology, tr, p. 679. 
1861. Nematus longicornis Norton. Proc. Bost. Soc. Nat. Hist., vii, p. 158. 
1867. Nematus longulicornis Norton. ‘Trans. Am. Ent. Soc.,1, p.214. (Cat.,ete., 
p. 76.) 
Black; orbits, face below antennie, tegulivc, anterior angle, pleura (except black 
spot on female), the whole body beneath, and legs whitish. Length 0.26; br. wings 
0.54 inch. 
Female.—Body rather long; antenne black, more than two-thirds the body, slen- 
der, third and fourth joints equal; head rather smooth; sutures at sides of ocelli 
distinct; lower ocellus in a basin, which is smooth and shining, obovate, with dis- 
tinct edges; nasus angulate, emarginate; labrum emarginate; a spot on vertex from 
antennie to summit, and the back of head black; remainder pale; a slender ridge 
runs through the groove on anterior lobe of thorax; the tegulie, anterior angle, 
pleura, and whole body beneath whitish, except two black spots on pleura, the ante- 
rior one large and lunulate; scutel black; sutures of abdomen indistinctly pale; legs 
pale, with the apical half of hinder femora and tibive and their tarsi blackish; inner 
tooth of claws large and near the tip; wings hyaline; stigma full; nervures and 
stigma piceous; base of stigma and costa pale. 
Male.—Antenne fulvous beneath, third joint shorter than fourth, curved at base; 
a straight, black line under the anterior wings; tips of posterior tibiwe blackish, their 
femora pale; stigma color of costa. 
Iowa (Say), Connecticut, New York, Pennsylvania, Great Slave Lake, Hudson 
Bay Territory. 
This species seems to be allied to cornelli n. sp. 
5, Pteronus (2) nortonii Dalla Torre. 
1867. Nematus fallax Norton. Trans. Am. nt. Soc.,1, p. 198. (Cat., ete., p. 60.) 
1894. Nematus nortonit Dalla Torre. Cat. Hyim., 1, p. 246. 
Black; mouth, cheeks, apex of venter, and tibixe in part reddish white; a black line 
down the tibiz above; body slender; length 0.18 to 0.20; br. wings 0.44 to 0.48 inch. 
Male.—Shining black; body slender; antennie rather long and slender, ferruginous 
beneath; nasus hardly incurved and with mouth below; lower half of cheeks and 
apex of venter yellow red; legs at base black, below the base of femora yellow red, 
with a blackish line down their upper side; mner anterior tibial spur stout; inner 
tooth of claw nearly as large as outer; wings perfectly hyaline, iridescent; stigina 
somewhat rounded above and with the costa pale greenish. 
Labrador (A. 8. Packard, jr.). Two males. 
6. Pteronus rufofasciatus Norton. 
1867. Nematus rufo-fasciatus Norton. Trans. Am, Ent. Soc., 1, p. 205. (Cat., ete., 
p. 67.) 
Black; a band on the middle of abdomen and most part of legs rufous; wings 
smoky hyaline; length 0.34; br. wings 0.70 inch. 
Female.—Black; body long and moderately stout; antenne about two-thirds the 
length of body, slender, cylindrical, third joint but little longer than fourth; head 
dull, with coarse, confluent punctures; nasus coarsely punctured, deeply channeled 
across the middle, angulate, emarginate; edge of labrum incurved; outer orbit 
and a spot opposite ocelli on each side, labrum, and palpi rufous; upper half of 
anterior angle and basin on each side of scutel rufous; abdomen, except the basal 
plates and three apical segments, chestnut red; legs the same color; cox, except at 
tip, black; anterior inner tibial spur stout, apparently bifid; inner claw tooth large; 
wings smoky hyaline, nervures piceous; stigma and costa pale. 
Mackenzie River, Hudson Bay Territory (R. Kennicott). 
