152 
ern species that finds its eastern limits of 
distribution in Illinois, lowa, Michigan and 
Minnesota. 
Illinois Record. — NortTHERN ILLINOIS: 
1yOr, 
Lygus atritibialis new species 
This species is allied to hesperus Knight 
and related western species, but is easily to 
be distinguished by its uniformly black an- 
tennae and posterior tibiae, fig. 163. 
Mave.—Length 5.40, width 2.50. Head 
width 1.17, vertex 0.45; yellow, collum 
black. Rostrum, length 2.30, extending 
slightly beyond hind coxae, yellow, apex very 
dark brown. Antennae uniformly black; 
first segment, length 0.52; second, 1.56; 
third, 0.87; fourth, 0.65. Pronotum, length 
1.25, width at base 2.16; yellow; a lateral, 
submarginal line joining outer half of callus, 
two rays behind each callus (in dark spec- 
imens these rays joining to form a submar- 
ginal line), and ray behind top of coxal cleft, 
black. Scutellum yellow; a geminate mark 
on middle of base, lateral edges and meso- 
scutum, black. Hemelytra pale, translucent 
yellowish; middle of clavus and outer apical 
angle of corium fuscous. Cuneus pale, trans- 
Qe 
Fig. 163.— Lygus atritibialis, 2. 
ILLINOIS NATURAL HIsToRY SURVEY BULLETIN 
Vol. 22, Area 
lucent; outer margin yellowish, but not 
darker on apex. Membrane pale fuscous, 
veins pale. Dorsum clothed with fine, short, 
pale pubescence. Ventral surface uniformly 
yellow. Legs mostly yellowish, but hind 
femora with two subapical black annuli; 
hind tibiae black; middle and front pairs 
pale, fuscous at apices and each one with a 
black ring at base, spines black; tarsi fus- 
cous, apices and claws very dark brown. 
Genital claspers as in fig. 161. 
FEMALE.—Length 5.20, width 2.50. Head 
width 1.17, vertex 0.52. Antennae, first 
segment, length 0.49; second, 1.51. Slightly 
more robust than male, but very similar in 
coloration; black marks on pronotum usually 
more reduced. 
Foop PLant.—Apparently breeds on 
wormwood (Artemisia canadensis). 
Holotype, male.—Oregon, Ill.: July 4, 
1932, on Artemisia canadensis, Mohr & 
Dozier. 
Allotype, female.—Same data as for 
holotype. 
Paratypes. —ILLINoIs.—OrgEGON: Same 
data as for holotype, 32 ¢ , 48 9. RocKForp: 
June 11, 1933, Mohr & Townsend, 24. 
ZION: July 6, 1932, T. H. Frison e¢ al eae 
MicHIGAN.—PENTWATER: July 17, 1916, 
E. Liljeblad, 1 4. 
MINNESOTA.—ST. Pau: St. Anthony 
Park, June 18, 1921, at light, H. H. Knight, 
OF KC 
Lygus elisus Van Duzee 
Pale Legume Bug 
eee pratensis elisus Van Duzee (1914, p. 
0). 
Matre.—Lenegth 4.80-5.80. Head width 
1.20, vertex 0.45. Rostrum, length 2.11, 
scarcely attaining posterior margins of hind 
coxae. Antennae, first segment, length 0.52, 
pale yellowish to brown, very dark brown 
on ventral surface; second, 1.98, dusky 
brown, lower side at base and extreme 
apex darker; third, 0.85, brownish, apex 
fuscous; fourth, 0.60, dusky brown. Prono- 
tum, length 1.40, width at base 2.20; coarse- 
ly, deeply and closely punctate, with minute, 
pale pubescence. General color pale green- 
ish with pronotum and scutellum bright 
green, a small black spot present behind 
each callus. Scutellum bright green, two 
black dashes in middle at base; roughly, 
transversely rugose. Mesoscutum black, 
