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7. Pteronus (?) satkatchewan Norton. 
1867. Nematus satkatchewan Norton. ‘Trans. Am. Ent. Soce.,1, p.200. (Cat., ete., 
p. 62.) 
1878. Nematus satkatchewan Provancher. Nat. Can., x, p. 56. 
1883. Nematus satkatchewan Provancher. Faun. Ent. Can. Hym., p. 187. 
Black; tegulie black; breast rufous; legs mostly yellow red; wings hyaline; length 
0.38; br. wings 0.76 inch. 
Female. — Shining black; body long; antennie long and slender, apical joint shorter 
than the preceding; the ocelli, seen from before, are each in a separate basin; 
nasus incurved; fourth joint of palpi short, fifth and sixth longer and very slender; 
thorax polished; labrum piceous; a large chestnut-red spot on pectus; legs same 
color; the trochanters and anterior tarsi whitish ; posterior tibiw, except at their base, 
and their tarsi black; anterior tibial inner spur stout, blunt pilose so as to appear 
bifid; inner claw tooth large; wings hyaline; stigma black. 
Lake Sathkatchewan (Smithsonian Institution). One female. 
8. Pachynematus (?) malacus Norton. 
1867. Nematus malacus Norton. Trans. Am. Ent. Soc.,1,p.196. (Cat., ete., p. 58.) 
1878. Nematus malacus Provancher. Nat. Can., x, p.53. 
1883. Nematus malacus Provancher. Faun. Ent. Can. Hym., p. 185. 
Black; tegule, trochanters, and legs below knees pale; length 0.28; br. wings 
0.60 inch. 
Female.—Shining black; body short and stout; antennie slender, joints of nearly 
equal length; lower ocellus in a shallow basin; nasus hardly incurved; tegule and col- 
lar whitish; coxe, femora, and tips of posterior tibia and of all the tarsi black; claws 
slightly dentate within; trochanters, anterior femora before, tibize, and tarsi except 
at tip white; wings hyaline; stigma and costa pale greenish, second submarginal 
widest at first recurrent nervure. 
Labrador (A. 8. Packard, jr.). Three females. 
9. Pachynematus (?) nigritus Norton. 
1861. Nematus nigritus Norton. Proc. Bost. Soc. Nat. Hist., vir, p. 159. 
1867. Nematus nigritus Norton. ‘Trans. Am. Ent, Soc.,1,p.201. (Cat., etc., p. 63.) 
Black; outer orbits and mouth, tegule, apex of abdomen, and legs in part pale; 
length 0.21; br. wings 0.48 inch. 
Female.—Black; body slender; antennz two-thirds the length of body, slightly 
flattened and enlarged at joints, third joint shorter than fourth; nasus hardly emar- 
ginate; an outer orbital line as high as suture, edge of nasus and beneath pale pice- 
ous; tegule and apex of abdomen and several apical segments of vertex yellowish; 
trochanters, apical half of femora, tibiw except tips of hinder pair, and base of 
tarsi reddish white; remainder black; inner tooth of claw very short, blunt and 
distinct from outer tooth; wings hyaline, nervures piceous, middle of stigma and 
base of costa paler; second submarginal cell with one angle below, the second recur- 
rent nervure coinciding with dividing nervure. 
Connecticut. Twomales. This may be the male of N. subalbatus. 
10. Pachynematus (?) sumptus Norton. 
1867. Nematus sumptus Norton. Trans. Am. Ent. Soc.,1, p.207. (Cat., ete., p. 69.) 
Black; mouth, orbits, and tegulee white; basal half of abdomen, spot on pleura; 
and most part of legs rufous; length 0.28; br. wings 0.62 inch. 
Male.—Body long; head large; mouth below antenn, the outer orbits extending 
over the back of head, and a narrow inner orbital line interrupted opposite ocelli 
yellow; nasus emarginate; tegulie and anterior angle whitish; abdomen chestnut 
13449—No. 3 9 
