May, 1953 
= 
KEY TO SPECIES 
Apvutt Mates 
Basal crossveins in first radial interspace 
of fore wing thickened and darkened in 
the middle, fig. 317; crossveins below 
bulla often connected by a longitudinal, 
black mark, always at least a black spot 
in the middle of one, two, or three 
erossveins below bulla......2....... 2 
Basal crossveins in first radial interspace 
of fore wing not thickened and dark- 
ened, or thickened uniformly from end 
to end; longitudinal, black mark never 
connecting crossveins below bulla, and 
these crossveins never widened and 
darkened in the middle only........ 10 
Caudal filaments and genital forceps uni- 
formly gray-tan; genitalia as in fig. 331, 
forceps base with a pair of large, sub- 
lateral, setose projections. .1. carolina 
Caudal filaments not uniformly gray-tan; 
filaments entirely white, without dark- 
colored rings at articulations, or these 
filaments white, yellow, or tan, with 
darker articulations; genital forceps 
white or yellow; eyes in life always 
I Punbae LECH Pee tyra Sate os creme es 3 
Outer lateral margin of each penis lobe 
with extremely minute spines, fig. 332 
er ar Ae jones: 2. candidum 
Outer lateral margin of each penis lobe 
with a cluster of large spines, figs. 
SISSIES TORO RIS ew sk AA ioe ss eam 4 
Venter of abdomen with a median, longi- 
tudinal, dark brown or black line ex- 
tending from anterior to posterior ends, 
this line slightly widened and with a 
narrow interruption at posterior margin 
of each sternite.......3. gildersleevei 
Venter of abdomen usually entirely im- 
maculate, occasionally with a faint 
mark on meson of posterior margin of 
SOMES COENITES rane snes on Bn Sy sewies« 5 
Abdomen white, with a bright Mars 
orange crossband at posterior margin 
of each tergite 1-7........ 4. areion 
Abdomen yellow, with black or very dark 
brown crossbands at posterior margins 
GIMECLPICCS Eph pee ga ercpteiee cis 6 
Spiracular dots present on abdominal 
segments, in very dark specimens these 
dots tending to fuse with black cross- 
bands at posterior margins of tergites; 
each penis lobe with an apicomesal and 
a mesially directed lateral spine, figs. 
SVL SSSI S 77 a ae Gi tah eal i ea ae 7D 
Spiracular dots absent from abdominal 
segments; each penis lobe with only the 
apicomesal spine, figs. 338, 339.......9 
Thoracic pleuron uniformly yellow, lack- 
ing an oblique, black streak ventral to 
base of fore wing..... 5. minnetonka 
Thoracic pleuron with an oblique, black 
streak ventral to base of fore wing, also 
a similar streak sometimes present 
ventral to base of hind wing..... et 
Abdominal tergites with a relatively 
broad, black crossband at posterior 
Burks: THE Mayr tiers or ILLINors 
10. 
Nile 
12. 
14. 
159 
margin of each; a longitudinal, black or 
dark gray line usually extending al- 
most or quite the entire length of ab- 
dominal dorsum; in very dark speci- 
mens abdomen almost completely black 
on dorsum; meso- and metascutellum 
dark brown to black... .6. canadense 
Abdominal tergites with a narrow, black 
line at posterior margin of each; median, 
dark, longitudinal line absent from ab- 
dominal dorsum, or, at most, with this 
line evident on basal one to three 
tergites only; meso- and metascutellum 
Viellowere Meee ns sgn ghee eee ae 7. frontale 
Black marks always present on face 
ventral to antennal sockets; usually a 
dark brown, oblique streak present on 
pleuron ventral to base of fore wing; 
first segment of fore tarsus one-fourth 
to one-third as long as second segment 
eee aarti Pokies 8. interpunctatum 
Black marks usually absent from face 
ventral to antennal sockets; dark 
streak never present on pleuron; first 
fore tarsal segment one-half to two- 
thirds as long as second segment..... 
Pt Reta e 9. heterotarsale 
Abdominal tergites 1— or 2-8 with three 
black marks at posterior margin of 
each: a median dot and a pair of sub- 
median, transverse dashes......... 11 
Abdominal tergites with a pair of sub- 
mesal, transverse, black lines at poste- 
rior margin of each; or with a contin- 
uous, black or dark brown crossline at 
each posterior margin; or with dark 
brown shading covering posterior one- 
quarter to one-half of each tergite; or 
with tergites almost or entirely un- 
marked. (Aye. o5)t5 sored en tenn 1192 
Outer margin of hind wing hyaline; com- 
pound eyes separated on meson by a 
space as wide as a lateral ocellus...... 
FONE M wi Ne EAE atin oo 10. tripunctatum 
Outer margin of hind wing shaded with 
dark brown; compound eyes separated 
on meson by a space two-thirds as wide 
as one lateral ocellus..11. femoratum 
Abdominal tergites 3-8 each with a pair 
of submedian, transverse, short lines at 
posterior, mareins | M2e ee ihe. 58 13 
Abdominal tergites with a continuous, 
dark brown or black crossline or color 
band at posterior margin of each or 
virtually without markings at posterior 
MALIN Seon an to eee ee tN 14 
Mesonotum dull gray-brown, first fore 
tarsal segment two-thirds as long as 
SECON ae ie 12. bipunctatum 
Mesonotum bright Mars orange, first 
fore tarsal segment one-half as long as 
Second Nay Weare, chat. Sohal rete 13. ares 
Ground color of abdomen dark tan or 
yellow-brown; each abdominal tergite 
2-7 with a broad, dark brown, trans- 
verse color band occupying posterior 
one-fourth to one-half of tergite, apical 
three tergites almost completely shaded 
WithmG arkebrOwni see) eee no 15 
