September, 1941 
July 31, 
KNIGHT: 
yceerienise Lozier. 1 dea cept., 
meee. He Frison, 14,29. 
Group II 
REYSLOVSCPEGIES 
. Apex of abdomen with  claspers 
(males); couplets 2-17 illustrated 
TH TG) A Sian 2 
to 
Apex of abdomen without claspers (fe- 
males); fully mature, well preserved 
specimens necessary for this sec- 
tion of key.. Se cooky 
Basal Peeiice a left rane aay 
thumblike projection, e.g., erectus.. 3 
Basal shoulder of left clasper Without 
thumblike projection, e.g., husseyz. 5 
Basal projection of left clasper ex- 
tending vertically as a tall, thick 
process bluntly rounded at apex... 
. i ee eee erectus, p. 199 
Basal projection of left clasper rather 
slender and acute, e.g., canadensis.. 4 
Right clasper with dorsal process ex- 
tending half the length of ventral 
BLO CeSSie tak canadensis, p. 193 
Right clasper with dorsal process not 
over one-third the length of ventral 
rceess: ac iss « brevifurcatus, p. 194 
. Basal shoulder of right clasper with- 
out angulate projection, e.g., schotti 6 
Basal shoulder of right clasper with a 
thumblike or angulate projection, 
Op WET ee ee ) 
Basal shoulder of right clasper with a 
rounded hump...... schotti, p. 197 
Basal shoulder of right clasper with- 
out rounded hump, e.g., Ausseyt... 7 
Genital segment with a distinct tuber- 
cle above base of left clasper...... 
5 A gaa er husseyi, p. 199 
Genital segment without tubercle 
above base of left clasper, ¢.g., 
SDAP ARINOD. 1S Ry A a a Re ae A AC 8 
. Base of left clasper with angulate 
Boulders: 22 Ns. 5 3: obtectus, p. 199 
Base of left clasper without angulate 
PEOUCLet = ene ules 3 salicis, p. 196 
Tip of right clasper hooked downward 
SS penipecten, p. 199 
Tip of right clasper projecting straight 
or curved upward, e.g., bueno, spi- 
- Tip of right clasper straight, e¢.g., 
THF eR ine Tk oe 11 
PLANT Buss, or MirRIDAE, OF ILLINOIS 
1 
TS: 
14. 
disie 
16. 
Lie 
18. 
1 
Tip of right clasper curved upward, 
RU KaLE DICALILS ERM Rg tay. arise a ve 
Base of left clasper convexly rounded 
Re es ese buenoi, p. 197 
Basco! leit clasper siUater 00am 
<1 ahd, 9 Aaa OR nigricollis, p. 197 
. Basal shoulder of right clasper with a 
slender fingerlike process project- 
IND eVeLtically. Cas PICA sew ee 13 
Basal shoulder of right clasper with a 
more angulate process, ¢.g., /acunos- 
Basal fingerlike process of right clasper 
tapering very little on apical half. . 
Oa Oe aes spicatus, p. 196 
Basal fingerlike process tapering grad- 
Wallyattomebase-to apexa sen. 45. 
Sa be oa ra ee cortitectus, p. 196 
Thumblike process at middle of right 
clasper sloping away from tip of 
CLAS Pere ret cea © 2. lacunosus, p. 197 
Thumblike process at middle of right 
clasper vertical in position, e.g., 
OU SET ee Oise Re Ee 15 
Wall of genital segment with a promi- 
nent, blunt tubercle at a point well 
above base of left clasper......... 
Yet eee arundinicola, p. 198 
Wall of genital segment without tu- 
bercle above base of left clasper. . .16 
Apical half of right clasper with 
sides parallel to point near apex. 
Cie oe ee en angustulus, p. 197 
Apical half of right clasper tapering 
gradually from base, e.g., onustus. .17 
Length of right clasper beyond base 
of dorsal process equal to four 
times the width of base at this point 
rs arene ee onustus, p. 194 
Length of right clasper beyond base 
of dorsal process not over two and 
one-half times the width of base at 
fhis'pointa sae neglectus, p. 194 
Corium with distinct black or dark 
fuscous mark across apical area, 
this mark extending obliquely ‘Germ 
radius to inner apical angle of cor- 
ium; dark area never broken with 
numerous, minute, — light-colored 
SPpotsie Saye) ©, evan ees etlearen tent 19 
Corium without distinct black mark 
across apical area; sometimes with a 
fuscous area, but this dark color 
broken by numerous, paler spots, 
or, if not, then dark-colored area on 
radius distinctly darker than oblique 
infuscatiomon Colum eee ges ee 28 
