346 
10 
11 
12 
13 
14 
DRAGONFLIES OF NORTH AMERICA 
Abdominal segment 9 wholly black on dorsum.............. 6. 
Abdominal segment 9 with blue on dorsum predominating..... a 
Abdominal segment 8 blue, antehumeral stripe complete........ 
eee ee ame een) ieveeneme. AANA! ramburii, p. 350 
Abdominal segment 8 bronze-black, antehumeral stripe like an in- 
verted, exclamationpmark... “aes 0204 2b ee eee posita, p. 350 
Abdominal segment usually 9 entirely blue, except for apical teeth 
LehpeF e SON oy. Re AES ae OTN ERTS Ee oy  .  - 8. 
Abdominal segment 9 with lateral, or broad transverse black 
BETIPES OF SPOtsS...0 5. weeks oe Coens cen oe 1. 
Abdominal segment 10 with a dorsal bifid process............ 9. 
Abdominal segment 10 with cylindrical, entire process.......... 
ee ese ge fanaa al aA gee ae ic: ots oo hae chat Penn a kellicotti, p. 351 
Abdominal segment 8 entirely blue except for apical teeth... . 10. 
Abdominal segment 8 usually with lateral black markings...... 
bay hes BN 1 Sons fev et eta dna Soe, ees eee demorsa, p. 352 
Superior appendages decurved, one-half the length of 10, with an 
acute, curved apical process; inferiors nearly the length of 10 
With an Outer actite PrOCesSs. . 2. 2.022. -aee es barberi, p. 352 
Superior appendages, in profile view, appearing as a small rounded 
lobe, one-fourth the length of 10; inferiors one-half the length 
of 10, an outer acute process with tip deflected inwardly...... 
Rep AN society ta eet RAM aah ied. Sih Men PRIN GR BR ce Fi utahensis, p. 353 
Abdominal segment 8 with black markings................. 12. 
Abdominal segment 8 entirely blue.............. credula, p. 353 
Process of inferior appendage not bifid at apex.............. 13: 
Process of inferior appendage bifid or trifid at apex............ 
dayel SA. dered paces A) RSS Pere eee perparva, p. 353 
Inferior appendages much longer than the superior, cylindrical, 
notched at tip; superior appendages with slender, straight pro- 
longation 2) 4h SSCEA ee Sees erratica, p. 354 
Inferior appendages hardly longer than the superiors, a rectangular 
superior basal lobe, not notched at apex; superior appendages 
with decurved prolongation................. verticalis, p. 355 
Bifid process on 10 as high as 10 is wide, forked in apical half... . 
MEAD Par NR bi ches Ala Gy Pocne  de Ni Loewe Avy it cervula, p. 355 
Bifid process on 10 only about one-fourth as high as 10 is wide, 
forked in less than -apreal ‘half: 2" i. .242.73- damula, p. 356 
