154 
a longitudinal cloud extending beyond ar- 
eoles to tip of membrane. Genital claspers 
as.in fig. 161; 
FEMALE. — Length=*6.10,. widths 2:22; 
slightly larger and more robust than male, 
but not differing in coloration. 
Host Prant.—Touch-me-not (/mpatiens 
biflora). 
Known DistripuTion. — Europe and 
Boreal America; apparently Holarctic in 
distribution. 
Illinois Records.—Eight males and 11 
females, taken May 7 to Oct. 6, are from 
Antioch, Bloomington, Bowmanville, Du- 
bois, Elizabethtown, Evanston, Fountain 
Bluff, Herod, Karnak. 
Lygus campestris (Linnaeus) 
Cimex campestris Linnaeus (1758, p. 448). 
Mare.—Length 4.10, width 1.77. Ovate, 
rather small. General color greenish brown 
or brownish yellow with fuscous areas; 
scutellum bright yellow or green; genital 
claspers, fig. 161, distinctive for species. 
FEMALE.—Slightly more robust than 
male; second antennal segment more slen- 
der; very similar to male in coloration. 
Foop PLants.—Poison hemlock (Conium 
maculatum) and other plants of the family 
Umbelliferae; Illinois specimens have been 
collected on wild parsnip (Pastinaca sativa) 
and cow parsnip (Heracleum lanatum). Re- 
ported in Massachusetts and New Bruns- 
wick as a pest on celery plants. 
Known DistrisuTIoN.—Common in the 
northern states and Canada; Holarctic in 
distribution. 
Illinois Records. — Seventy-one males 
and 83 females, taken April 12 to Oct. 9, 
are from Algonquin, Allerton, Antioch, 
Browns, Champaign, Elizabeth, Lawrence- 
ville, Oregon, Palos Park, St. Joseph, Sey- 
mour, Spring Grove, Urbana, Waukegan, 
Willow Springs, Worth. 
Lyégus apicalis Fieber 
Lygus apicalis Fieber (1861, p. 275). 
Lygus Carolinae Reuter (1876, p. 71). 
Lygus carolinae Reuter has remained an 
enigma to American Hemipterists up to the 
present time. Mr. W. L. McAtee visited 
the Stockholm museum in 1927 and at the 
writer's request examined the type of caro- 
linae and drew the genital claspers. These 
distinctive structures leave no doubt about 
Ittinors NaTtrurRAL History SURVEY BULLETIN 
V ol. 22; Arte 
the identity of the species and its synonymy 
with apicalis Fieber. 
Mace.—Length 4.50-5.00, width 2.00; 
body oblong; head broad, width 1.12, vertex 
0.29, eyes unusually large. General color 
greenish, dark green, or yellowish green; 
membrane, and, in some cases, corium, 
marked with fuscous; genital claspers dis- 
tinctive for species, fig. 161. 
FEMALE.—Length 4.60, width 2.05; width 
of head 1.05, vertex 0.37; uniformly green 
or greenish yellow; eyes dark brown; tip 
of tarsi and apex of rostrum very dark 
brown. | 
Host PLtant.—Fleabane (Erigeron cana- 
densis). 
Known DistrisutTion.— Throughout the 
eastern United States, and known also from 
Europe, Mexico, Central America and is- 
lands of the Pacific. 
Illinois Records. — Twenty-seven males 
and 32 females, taken June 24 to Nov. 11, 
are from Cypress, Grand Tower, Hardin, 
Lawrenceville, McClure, Monticello, 
Mounds, Quincy, Shawneetown, Ullin, Ur- 
bana, Villa Ridge, Ware. 
Neolygus Knight 
KEY ,.TO SPECIES 
1. Pronotal disk greenish, or yellowish 
to brownish, but without distinct 
dark rays... .. 223 2 
Pronotal disk black or marked with 
dark rays.....9:4 23a nn 29 
2. Color chiefly greenish, old specimens — 
frequently fading to yellowish; 
sometimes darkened on clavus and 
at tip of corium, but ground color 
OTEEN «2. ee oh be 3 
Color distinctly yellowish or brownish, 
more brownish than green........ ¥ 
3. Tibial spines with fuscous spots at 
base; cortum never infuscated, but 
inner half faintly bronzed; clavus 
and basal half of pronotum usually 
bronzed .-..).3)eee alni, p. 157 
Tibial spines without fuscous spots at 
base... . .. ¢s..0 Dn yh 
4. Dorsum uniformly greenish, with a 
small, fuscous mark beginning at 
inner apical angles of corium and 
extending transversely across anal 
area of membrane; length 5.20- 
5100 eet cee neglectus, p. 162 
