L2 
Poecilocapsus Reuter 
Poecilocapsus lineatus (Fabricius) 
Four-Lined Plant Bug 
Lygaeus lineatus Fabricius (1798, p. 541). 
Apu.tt. — Fig. 167. Length 7.00-7.50, 
width 3.50. General color yellow or green 
yellow, with four black lines on the dor- 
=, 
SS. 
. 
Fig. 167.— Poecilocapsus lineatus. 
sum; certain specimens have the yellow of 
the hemeleytra replaced by bright green. 
Host PLrants.—A large number of her- 
baceous plants, especially dock (Rumex sp.) ; 
occasionally becomes a pest on currant 
bushes (Ribes sp.). Large numbers of speci- 
mens were collected in Illinois on potato 
foliage (Solanum tuberosum). 
Known Distrinution. — Throughout 
most of the eastern states and Canada. 
Illinois Records.—Sixty-eight males, 129 
females and 16 nymphs, taken May 7 to Sep- 
tember, are from Algonquin, Anna, Antioch, 
Beach, Bishop, Bluff Springs, Carbondale, 
Carlinville, Champaign, Chicago, Clarks- 
ville, Cypress, Danville, Edgebrook, Eliza- 
bethtown, Fountain Bluff, Frankfort, Free- 
port, Galena, Galesburg, Giant City State 
Park, Makanda, Glendon Park, Glen Ellyn, 
ILLINoIs NATURAL History SuRvVEY BULLETIN 
Vol. 22, Art 2 
Golconda, Grand Detour, Hardin, Havana, 
Joliet, Kankakee, Karnak, Manito, Morton 
Grove, Mount Carmel, Oakwood, Odin, 
Palos Park, Quincy, Rockford, Rockton, 
Urbana, Vienna, Villa Ridge, Volo, War- 
saw, Waukegan, Willow Springs. 
Horcias Distant 
KEY TO SPECIES 
1. Second antennal segment clavate, its 
maximum diameter exceeding diame- 
ter of first segment; embolium white, 
cuneus rose colored; see frontispiece 
ws — illini, p. 172 
Second antennal segment slightly cla- 
vate, but its maximum diameter less 
than diameter of first segment...... Z 
2. Rostrum not surpassing posterior mar- 
gins of middle coxae; color black 
with scutellum frequently red...... 
. obs Gs ay fallax, p. 173 
Rostrum extending nearly to posterior 
margins of hind coxae; color vari- 
able... ese dislocatus, p. 173 
Horcias illini new species 
This species is allied to dislocatus (Say), 
but differs from it in being smaller, and in 
having a narrower vertex and more strongly 
clavate second antennal segment; in color, 
it is very similar to dislocatus flavidus 
Knight, but the cuneus, calli and head are 
distinctly reddish; the color pattern appar- 
ently is not variable. 
Mate.—Frontispiece. Length 5.20, width 
2.70. Head width 1.12, vertex 0.43. Ros- 
trum, length 1.95, nearly attaining hind mar- 
gins of middle coxae. Antennae, first seg- 
ment, length 0.74, thickness 0.14, black; 
second, 1.86, thickness 0.15, slender at base 
(0.07 thick), gradually enlarging to clavate 
on apical half (0.15 thick), black, densely 
clothed with short, velvety, yellowish pu- 
bescence; third, length 0.82, basal one-fourth 
widened and pale brown, distal part slender 
and black; fourth, length 1.04, slender, black, 
with narrow, tan area at base. Pronotum, 
length 1.21, width at base 2.04. Surface of 
body smooth and shining; dorsum with 
sparse and very fine pubescence. General 
coloration black and white with lighter areas 
tinged with reddish. Head yellowish to red- 
dish brown, frons with transverse reddish 
lines on either side. Pronotum white, a large 
