26 Ittinois NAtTuRAL History SuRvEY BULLETIN 
Starved Rock State Park, Tremont, Urbana, 
Zion. 
Chlamydatus suavis (Reuter) 
Agalliastes suavis Reuter (1876, p. 92). 
AbuULTs.—Length 2.28, width 0.97; slight- 
ly smaller than associatus (Uhler) ; entirely 
black except the tibiae, which are pale 
yellow. 
Foop PLant.—Ragweed (Ambrosia sp.). 
Known DistrisuTion.—Connecticut, I]- 
linois, Iowa, Kansas, New York and south- 
ward. 
Illinois Records. — Twenty-one males 
and 35 females, taken June 5 to Sept. 19, 
are from Algonquin, Alto Pass, Carbondale, 
Champaign, Darwin, Dixon, Dubois, Eliza- 
beth, Evergreen Park, Fountain Bluff, Free- 
port, Galesburg, Grand Tower, Havana, 
Herod, Metropolis, Mount Carmel, Mur- 
physboro, Rockford, Savanna, Starved Rock 
Stateubark Urbana. 
Chlamydatus pulicarius (Fallen) 
Lygaeus pulicarius Fallen (1807, p. 95). 
Not as yet collected in Illinois; known 
from Michigan, Minnesota, New York. 
Plagiognathus ee: 
KEYS LORLEGIES 
1. Tibial spines pale, without black spots 
a tases steatte kn Meee toes ecient mn 
Tibial spines dark, with a black spot 
at base of each, these spots some- 
times obsolete near apices of tibiae. 3 
2. Almost colorless; first antennal seg- 
ment with two black lines; a black 
line near apices of dorsal and ventral 
margins of femora; hind femora with 
single black spot on anterior aspect 
Brees en eae nigrolineatus, p. 34 
Color yellowish, antennae and femora 
without black lines; hind femora 
with a few small fuscous points on 
anterioktacc ae sericeus, p. 34 
3. Second antennal segment dark fuscous » 
to black, sometimes slightly paler at | 
middle, but always with more area 
blacksthanvlipn Gea eee 4 
Second antennal segment chiefly pale, 
blackishvonly tat basey ss: estan od 
4. Cuneous partly or entirely black, 
Hever chiefl ybrown, mee uk. ee ee 5 
io. 
tale 
V ol: 2250Ar tS 
Cuneus pale, or uniformly fulvous to 
dark brown, sometimes dusky at 
apex, but never distinctly black. . .20 
. Cuneus more or less pale at base..... 6 
Cuneus uniformly black like corium, 
rarely somewhat pale at fracture. . .13 
. Scutellum partly or completely pale, 
sometimes pale only at apex or 
along lateral margins q 
Scutellum uniformly blaclo nee 10 
. Scutellum black along median line, 
with variable light-colored areas at 
margins... 2... onda a: 
oe obscurus var. obscurus, p. 32 
Scutellum pale along median line, 
sometimes pale only at apex, or 
almost entirely light colored with 
only basal angles blackishee aaa 8 
Rostrum short, scarcely reaching 
bases of middle coxae; pronotal disk 
with broad, dark stripes, leaving 
median line and lateral margins pale 
yecllow.t. 7 eee gleditsiae, p. 37 
Rostrum extending to hind coxae.... 9 
Femora pale to light yellowish brown, 
hind pair with two rows of promi- 
nent black spots, these spots some- 
times obscured with darker color; 
hind femora never noticeably black 
at base and pale in middle; cuneus 
pale at base and along outer mar- 
gin; length 3.90 41503 
see ee flavoscutellatus, p. 32 
Femora pale to black, usually black at 
base and pale in middle; in dark 
specimens femora black with only 
apices pale; cuneus pale at base, but 
not along outer margin; length 3.80 
—4.00. . politus var. flaveolus, p. 29 
Pronotum and hemelytra black; cu- 
neus with a small, light-colored spot 
at base, or with apex paler than 
base..2. 6.0.5. 044 er 11 
Pronotum pale at posterior margin, 
corium chiefly light yellowish brown 
or ivory white, but with a large, 
somewhat ovate, fuscous spot on 
apical half; cuneus pale, with a 
small black spot at apex ayaa 
... .obscurus var. fraternus, p. 32 
Femora yellowish, with one or two 
rows of black spots on anterior face, 
pubescence yellowish to golden; 
letig this. 00 Seca eee cuneatus, p. 34 
Femora black, pale at apices........ 12 
