127 
ished on the pectus; a pale subtriangnlar tubercle on the lateral margin of the 
black, subpolished, basal plate; abdomen subpolished, bright fulvo-rufous, the 
basal edge of joint 1, next the basal membrane, which is whitish, clouded with 
black; genitals obfuscated; legs black: wings subh valine, slightly tinged Avith 
fuliginous; veins and stigma black. 
Kock Island, 111. 
One male bred March 29, from an old subpeduncled spherical gall of Cecidomyia 
•5. batatas Walsh, on S. humilis. Female unknown. As the mother sawily must 
have deposited her egg in this gall after the gall maker had quit it, or not long 
before, it is a question if this species can be considered an inquiline. 
There is very little doubt but that this is the same with X. luteoter/jum male, which 
only differs in having the legs in j>art piceous and in being somewhat smaller. 
(See note 2, p. 22.) 
2. Pteronus (?) hudsonicus Norton. 
1867. Xematns hudsonievs Norton. Trans. Am. Ent. Soc., I, p. 207. (Cat., etc., 
p. 69.) 
Black ; orbits, mouth, teguhe, anterior angle, venter, and legs, except a black line 
on two posterior pair, white; length 0.38; br. wings 0.70 inch. 
Female. — Antenna- less than half as long as the body, joints cylindrical, somewhat 
enlarged at tip, third and fourth of equal length; sutures at sides of ocelli deep; 
ocelli in a triangular basin; nasus very slightly emarginate; orbits, space about 
antenna 1 and mouth beneath, teguhe, anterior anglo (a black line in middle), and the 
venter whitish, the latter Avith a row of black spots on each side forming an inter- 
rupted black line; scutel large, produced behind a slightly raised angle; legs dull 
Avhite, with the basal upper half of anterior femora, a line down the upper side of 
posterior femora, and tibia' and their tarsi black; anterior inner spur of tibiae blunt, 
bifid; inner tooth of claAv large ; Avings hyaline; stigma and costa brown; emargina- 
tion of stigma distinct. 
One female. Fort Good Hope, Mackenzie KiA'er, Hudson Bay Territory (B. Ken- 
nicott). 
3. Pteronus (?) lateralis Xorton. 
1867. Nematus lateralis Xorton. Trans. Am. Ent. Soc, I, p. 211. (Cat., etc., p. 73.) 
Black; orbits, face below antenna-, pleura, body, body beneath (except breast), 
and legs pale; length 0.38; br. Avings 0.76 inch. 
Female. — Antenna' half the length of body, joints cylindrical, third and fourth 
equal, slightly enlarged at tips; sutures at sides of ocelli deep; lower ocellus in a 
shallow circular Bpace, which has a distinct ridge around its upper half; nasus pro- 
duced, distinctly emarginate in middle and at sides; tongue and palpi dark, last 
joint of maxillary palpi shorter than the preceding; the whole orbits as far as 
sutures, two spots behind ocelli, a spot above antenna', space around, and face below 
reddish Avhite; sutures of metathorax and a bent line between upper wings crossing 
upper half of scutel rufous; teguhe. anterior angle, pleura, and body beneath except 
a black spot on breast reddish Avhite; legs the same color; tarsi fuscous; a slender 
black line on the upper and lower side of femora, and less distinctly on the posterior 
tibiae; anterior inner tibial spur bifid; inner claw tooth large and near the tip; 
wings hyaline: nervures black; stigma pale, with little or no emargination above; 
second recurrent nervure received at a distance from the intersection of second and 
third cells. 
Var. Abdomen almost entirely pale. 
Three females. Brunswick, Me. (A. 8. Packard). Albany, X. Y. (Dr. Peck). 
This species, though distinct from, seems somewhat closely allied to 
my hyalinus n. sp. 
