32 ItLIno1s NATURAL History SURVEY BULLETIN 
first segment, length 0.22; second, 0.86, pale, 
narrow area at base black; third, 0.53, pale; 
fourth, 0.34. Pronotum, length 0.58, width 
at base 1.08. Body black; basal one-third 
of corium and embolium, adjacent area of 
clavus, cuneus and vertex, pale, but hypo- 
dermis tinged reddish; clothed with pale 
yellowish pubescence. Membranes fuscous, 
pale on veins and near apex of cuneus. Legs 
pale to reddish, hind femora with two rows 
of black X markings. 
FEemaLe.—Length 3.50, width 1.50; very 
similar to male in form and coloration. 
Paler specimens lacking red in the hypo- 
dermis, referable to variety debilis Blatch- 
ley (19260, p. 941), were taken in company 
with the typical form. 
Host PLANT.—Sandbar willow (Salix 
longifolia). A single Illinois specimen was 
taken on red cedar (Juniperus virginiana), 
but probably did not feed on that plant. 
KNown DIstrIBUTION.—Illinois, Iowa, 
Minnesota, Ohio, Pennsylvania. 
Illinois Records. — GALEsBurG: June, 
10.8 GRAND #UErouR: duly e281932200n 
Salix sp., Dozier & Mohr, 42, 69. Ha- 
VANNA: June 23, 1926, Frison & Hayes, 
I ¢@. KaAmpsvILLE: June 10, 1932, on Ju- 
niperus virgimana, H> +l Dozier, 1¢@. 
MarsHA.i: June 14, 1933, Frison & Ross, 
Dee Oe eS MIONTICALLOMe | Gly Qeels 3, c0n 
Salix spy, © L) aH. Erisons ove Beoprerc- 
TOW NGS uly 701 925s ae isons leae 
RockKForp: July 5, 1932, on Salix sp., 
Dozier & Mohr, 19. Urpana: Sept. 1, 
1930 a ee Heebrisoneless 
Plagiognathus flavoscutellatus Knight 
Plagiognathus flavoscutellatus Knight (19234, 
p. 440). 
This may be distinguished by its pale 
scutellum and fulvous femora with two rows 
of black spots. 
Mave.—Length 4.40, width 1.67. Head 
width 0.80, vertex 0.36. Rostrum reaching 
to middle of hind coxae. Antennae black; 
first segment, length 0.31; second, 1.43; 
third, 0.88; fourth, 0.47. Pronotum, length 
0.68, width at base 1.29. General color 
black; basal half of embolium and corium, 
apex of embolium, base and outer margin of 
cuneus, pale to yellow, pale color on corium 
limited by radial vein. Membrane uniformly 
fuscous, spot bordering apex of cuneus and 
veins pale or yellowish. Legs fulvous to dark 
brown; femora with two rows of black spots 
V ot. 223 Ariowd! 
on anterior face, irregularly spotted on pos- 
terior face. 
FemMALE.—Length 4.30, width 1.70; more 
robust than male, usually pale areas broader. 
Scutellum except base, area just before calli, 
and slight vitta on median line at base of 
pronotal disk, pale. Embolium, claval su- 
ture, anal ridges joining with base of cuneus, 
pale. Legs more fulvous than in male. 
Foop PLANT.—Sandbar willow (Salix 
longifolia). 
KNown DIstTrRIBUTION.—New England 
states westward to Iowa, Minnesota and 
Nebraska. ; 
Illinois Records.—Eighteen males and 12 
females, taken June 1 to July 8, are from 
Beardstown, Elizabeth, Freeport, Grand 
Tower, Mount Carmel, Oakwood, Proph- 
etstown, “Thebes, West Union, White 
Heath. 
Plagiognathus obscurus Uhler 
Plagiognathus obscurus Uhler (1872, p. 418). 
FEMALE.—Fig. 88. Length 4.40, width 
1.69; larger and more elongate than albo- 
notatus Knight, moderately shining, with 
pale yellowish pubescence. Rostrum scarcely 
reaching hind margins of posterior coxae. 
Antennae fuscous to black, first segment 
Fig. 88.— Plagiognathus obscurus. 
