132 
Known DistripuTion.—F lorida, Illinois, 
Louisiana, Minnesota, New York, North 
Dakota, Ohio, Oklahoma, Ontario, Wiais- 
consin. 
Illinois Records.—Go.tconpba: June 22, 
1932, on Salix sp., Ross, Dozier & Park, 
1¢. Granp Detour: June 27, 1906, on 
willow, 1 ¢, 29; June 30, 1909, sweeping 
grass; lid’ uly 24; 19035 264s Auge 26, 
1889,.C, Av Hart, 2:65) Was RULEIMAN: 
July 10; "1 910574 3B Wolcott also aro 
Platytylellus Reuter 
KED slOSSPE CIES 
1. Length of first antennal segment less 
thankwicith off vcrtex sweet ee 2 
Length of first antennal segment equal 
to or greater than width of vertex... 4 
2. Pronotal disk without median red 
vitta; length of first antennal seg- 
ment twice lateral width of an eye. 
Pes Fa Fe eel nigricollis, p. 133 
Pronotal disk with median red vitta 
that extends to join red area on 
SCUtellimi eee ee ee eee meee 3 
3. Hemelytra uniformly black; scutellum 
reds) lengenms- 00> os: 30 ee = ae 
_ eer so eens rubrovittatus, p. 133 
Hemelytra with lateral margins pale 
to orange colored; commissure pale; 
scutellum black with a broad, red 
median line; length 6.20-6.60..... 
Bas, Wien) ae ere ee: zonatus, p. 133 
4. Pronotum yellow to orange yellow... 5 
Pronotum red, or red with black, or 
Ghiefl yep lacks ssin me eee ae i 
5. Scutellum black; male genital seg- 
ment with a prominent tubercle at 
base of each clasper, as in fig. 150. . 
Se See es nigroscutellatus, p. 134 
Scutellum orange yellow; male genital 
segment without tubercles........ 6 
6. Width of pronotal collar slightly 
greater than width of head; length 
8.70 .insitivus var. insitivus, p. 133 
Width of pronotal collar less than 
width of head; length 6.80-8.00. . . 
insitivus var. angusticollis, p. 133 
—T 
. Male with a prominent lateral tuber- 
cle near base of left genital clasper, 
fig. 150; both sexes with pronotal 
disk uniformly red, or red and black; 
in latter case, black always present 
along median line, but sometimes 
ItLino1is NATURAL History SuRVEY BULLETIN 
Lbs 
IS: 
14. 
Vol. 22,°-Ariae 
black spreads to cover all but nar- 
row area along lateral margins; lat- 
tera] margins of hemelytra eke 
ly‘red or pale... ..5 72.3 8 
Male without tubercle near base of 
left genital clasper; both sexes usu- 
ally with pronotal disk black; fre- 
quently pronota! disk red and with 
black, but, in that case, red color 
present along median line, thus 
leaving a black ray present on either 
side; these rays may be reduced to 
spots near basal margin; latera] mar- 
gins of hemelytra sometimes red, 
but, in that case, median line of 
pronotum red with a black vitta 
on either side... 2 ane im 
Hemelytra uniformlysblackaa=aaem 
..fraternus var. fraternus, p. 134 
Hemelytra with lateral margins pale 
or red... ...0).5 2 er 
. Scutellum uniformly bright red...... 
.....fraternus var. regalis, p. 134 
Scutellum black. >. 2333 10 
. Calli black. 32 eee frater- 
nus var. rubromarginatus, p. 134 
Callured. ...02... 
Tae fraternus var. discifer, p. 134 
Hemelytra with red lateral margins; 
pronotal disk red at median line, 
thus leaving a black or fuscous vitta 
at either side; vitta sometimes re- 
duced to a black spot near basal 
Marg inane circumcinctus, p. 135 
Hemelytra uniformly black......... 12 
Length of first antennal segment 
equal to width of vertex plus one- 
third dorsal width of.an eye; length 
190 sae rubellicollis, p. 136 
Length of first antennal segment only 
slightly greater than width of ver- 
tex, less than width of vertex plus 
one-third dorsal width of an eye; 
length 7.70, or less?) 13 
Head black, basal margin of vertex 
with a narrow red line; pronotal 
collar red, with usually a black area 
above; base of venter red beneath; 
gula never red; surface coarsely 
granulate.........borealis, p. 136 
Head red, tylus and variable areas on 
juga and lora black; surface very 
finely granulate. . J 
Venter black, ee not more tee a 
red tinge at base; scutellum red, 
lateral margins blace pronotal disk 
