September, 1941 
similar to male in coloration but more robust 
in form. 
Foop PLant.—Sweet gale (Myrica gale). 
Known DistripuTion.—lIllinois, Massa- 
chusetts, Minnesota, New York. 
Illinois Records.—ANTIOocH: July 5-7, 
Profs tien Krison, 14>) Aug: 15 1930; 
Frison, Knight & Ross, 3 ¢. CEDAR LAKE: 
Aug. 4, 1906, bog, 39. SUN LAKE: Aug. 9, 
1906, bog, 1¢. 
Plagiognathus chrysanthemi (Wolff) 
Miris chrysanthemi Wolff (1804, p. 157). 
Plagiognathus viridulus Reuter (1878, p. 74). 
Known only from eastern Canada, New 
England states, New York, Pennsylvania; 
Europe. Feeds on the oxeye daisy, Chrys- 
anthemum leucanthemum. 
Plagiognathus alboradialis Knight 
Plagiognathus alboradialis Knight (1923d, 
p. 439). 
Known from British Columbia, Connecti- 
cut, Maine, Newfoundland, New Hamp- 
shire, New York, Ontario, Vermont. 
Plagiognathus syrticolae new species 
This runs to flavicornis Knight in my key 
(Knight 1923d, p. 431), but is distinguished 
by the shorter and thicker second antennal 
segment which, in length, just equals the 
width of the head. 
Mate.—Length 3.30, width 1.25. Head 
width 0.69, vertex 0.34. Rostrum, length 
1.08, reaching close to hind margins of hind 
coxae, dark fuscous, paler at middle. Anten- 
nae, first segment, length 0.19, black; second, 
0.69, equal in thickness to first, yellowish, 
black at base, with close, pale pubescence; 
third, 0.43, yellowish; fourth, 0.31, pale. 
Pronotum, length 0.52, width at base 1.00. 
General color black, moderately shining; 
pubescence pale, with a few fuscous hairs 
on corium and cuneus. Legs fuscous, tips 
of femora paler, tibiae pale yellow, spines 
black, fuscous spots at bases of spines some- 
times rather small, tarsi pale, apices fuscous. 
FEMALE.—Length 3.60, width 1.50. Head 
width 0.69, vertex 0.36. Antennae, first seg- 
ment, length 0.22; second, 0.69, third, 0.43; 
fourth, 0.30. Very similar to male in form, 
color and pubescence. 
Host PLant.—Sand willow (Salix syrtic- 
ola), a willow known only from the shores 
of the Great Lakes. 
KNIGHT: PLANT Bucs, or MIrRIDAE, OF ILLINOIS St 
Holotype, male. —Waukegan, IIl.: July 
6, 1932, on Salix syrticola, ‘I. H. Frison 
et al. 
Allotype, female.—Same data as for 
holotype. 
Paratypes.—Same data as for holotype, 
IR abe ke 
Plagiognathus albonotatus Knight 
Plagiognathus albonotatus 
p. 437). 
This is nearly the same size as politus 
Uhler, but is slightly more robust; the 
second antennal segment, except for its base, 
the cuneus, and the basal one-third or more 
of the corium, are pale. 
Mave.—Length 3.50, width 1.50. Head 
width 0.71, vertex 0.36. Rostrum reaching 
hind coxae. Antennae, first segment, length 
0.28, black; second, 1.00; third, 0.70; fourth, 
0.47. Pronotum, length 0.57, width at base 
1.11. General color black, basal one-third 
of embolium and corium, and portion of 
the adjacent area on clavus, pale; mem- 
brane uniformly fuscous; body clothed with 
pale yellowish pubescence. Legs black; tibiae 
pale; knees, spines and spot at base of each 
spine, black; spots absent or much reduced 
on apical one-third of tibiae. 
FEMALE.—Length 3.40, width 1.60. Very 
similar to male, but slightly more robust. 
Pronotal disk frequently with pale spot on 
middle. Sides of venter more or less pale. 
Specimens with more extensive pale areas 
than the typical have been designated compar 
Knight (1923d, p. 438); the two have been 
found to occur together in Illinois. 
Foop PLant.—Meadow-sweet (Spiraea 
salicifolia). 
Known Distripution.—Colorado, Illi- 
nois, Maine, Minnesota, New York, North 
Dakota, Ohio. 
Illinois Records—ANTIOcH: July 5-7, 
1932 Prisonsetualo leds) 9 NorTHERN 
TEEN OIS cn Oe 
Knight (1923d, 
Plagiognathus tinctus Knight 
Plagiognathus albonotatus var. tinctus Knight 
(1923d, p. 437). 
The size and color in this species are sug- 
gestive of albonotatus Knight, but the pale 
areas are tinged red. 
Mave.—Length 3.70, width 1.50. Head 
width 0.69, vertex 0.30. Rostrum just reach- 
ing hind margins of middle coxae. Antennae, 
