148 
cally glabrous. General color pale yellow- 
ish brown; hemelytra translucent; collar 
and tip of scutellum pale to white; apex and 
inner half of cuneus, brachium, disk of 
scutellum, apices of femora, and area on 
venter, somewhat reddish; third and fourth 
antennal segments infuscated; apex of ros- 
trum piceous; membrane fumate or pale 
brownish. 
FEMALE.—Length 7.00, width 2.70; more 
robust than male, but otherwise very simi- 
lar in structure and coloration. 
Foop PLant.—White pine (Pinus stro- 
bus). "The nymphs are yellowish with a 
tinge of brownish, and thus very closely 
match the color of the bud scales of their 
host plant. 
Known DiIstTrIBUTION. — Illinois, 
Hampshire, New York. 
Illinois Record. — NorTHERN ILLINOIS: 
Pe 
New 
Lygus Hahn 
KEYS TOsSEECIiSs 
1. Length of second antennal segment 
less than width of head; body 
ovate, robust, yellowish brown to 
dark reddish brown, darkened with 
fuscOUSss ee rubicundus, p. 153 
Length of second antennal segment 
greater than width of heads... 2. | 2 
2. Basal carina of vertex lacking in mid- 
dle, visible only at corners of eyes; 
green or greenish yellow, preserved 
specimens fading to dull yellowish; 
Y-shaped fuscous mark formed by 
anal areas of membranes; usually 
with a longitudinal cloud distad of 
aregles.;. naan pabulinus, p. 153 
Basal carina of vertex entire; various- 
leecolored oie tah eee a 3 
3. Rostrum just attaining posterior mar- 
gins of middle coxae; scutellum 
brigh@vellow-onerecn: 9, eee 
ES ee Set ee campestris, p. 154 
Rostrum reaching to or slightly be- 
VOnG ind cOxdCHe.: eaee oer 4 
4 =e linditiblaccdeep black aera nee 
WS ae ey: atritibialis, p. 152 
Hand tibiae more or less pales 4 am 5 
5. Color chiefly pale or green, sometimes 
with darkersmarkings = geen 6 
Color yellowish brown to black, or 
PedCISI 314-5! cea ee ee eee 8 
ILttinois NATURAL History SURVEY BULLETIN 
V ol. 22, Art. 1 
6. Tibiae uniformly pale greenish, with- 
out bands at base; eyes large; color 
of body chiefly green. .apicalis, p. 154 
Tibiae spotted, often with red and 
black bands at base...) eae J 
7. Rostrum almost, but not quite, reach- 
ing tips of hind coxae; abdomen uni- 
formly green; area along claval vein 
and spot on apical area of cor1um 
fuSCOUS. .. . oe elisus, p. 152 
Rostrum attaining or slightly exceed- 
ing apices of hind coxae; abdomen 
marked with black; hemelytra of 
female uniformly pale, of male 
darkened with red and black...... 
Sa tie sala, a hesperus, p. 151 
8. Hemelytra black and irregularly mot- 
tled with greenish yellow; head and 
anterior part of pronotum yellowish 
green, usually with two black rays 
behind each callus] 3) 
iets hee plagiatus, p. 153 
Hemelytra sometimes dark but not 
mottled with pale spots; head and 
pronotum not colored as above.... 9 
9. Length 6.50-7.30; nearly glabrous, 
strongly shining. . vanduzeei, p. 150 
Length 4.80-6.30; distinctly pubes- 
10. Second antennal segment three times 
as long as first segment; frons uni- 
formly yellowish, without black 
lines; length 6.00-6.30. .frisoni, p. 151 
Second antennal segment less than 
three times as long as first segment; 
frons with median line dark; length 
5.00-5750 ene oblineatus, p. 148 
Lygus oblineatus (Say) 
Tarnished Plant Bug 
Capsus oblineatus Say (1832, p. 21). 
This species has passed in American liter- 
ature under the name Lygus pratensis (Lin- 
naeus) for many years. It differs, however, 
from the European pratensis in the struc- 
ture of the right genital clasper, fig. 161; 
oblineatus is darker in color and has def- 
inite stripes. 
Apu.tts.—Fig. 162. Length 4.90-5.50, 
width 2.50; ovate. General color shining, 
yellowish brown with more or less blackish 
marking, or reddish brown and _ fuscous 
areas; pronotum with yellowish and blackish 
rays; scutellum margined with blackish 
leaving a Y- or heart-shaped yellowish 
