288 
10 
11 
12 
13 
14 
15 
DRAGONFLIES OF NORTH AMERICA 
Superior appendages bilobed or trilobed at apex, inner margin 
rounded and convex before the tip) 2) (02 ee ee ee 8 
Superior appendages almost entire at the tip, the inner margins 
with an anteapical projection) inj eet ee ee 9. 
Inferior appendages bifid: "ror ce a. ane eee hinei, p. 295 
Inferior appendages net bifid. 0.0 soe agrioides, p. 291 
Pale colors on thorax and abdominal segments 3-6 violet. 
Antenodals of the front wing 4.............. violacea, p. 300 
Pale colors of the thorax and abdominal segments 3-6 blue. 
Antenodals of the fore wing 3... 2.2.0... ..- immunda, p. 296 
Dark humeral stripe wider than the pale antehumeral, straight 
and of equal width throughout........... bipunctulata, p. 293 
Dark humeral stripe narrower than the pale antehumeral, at least 
in theymiddlé:thirdsof its length sion): ace eee Eh, 
Dark humeral stripe a mere hair line throughout its entire length 
os: LONE ARINC HEE NS az CRANSTON GAM Sie HE Dit aaa Man tonto, p. 299 
Dark humeral stripe not of uniform thickness throughout, the 
ends being greatly thickened, while the median third or more 
istreduced or wanting: 5 13.0..0. 0.0208). eee eee vivida, p. 301 
Wings a uniform smoky brown.............. fumipennis, p. 295 
Wings clear or with only the extreme tips smoky............ 13. 
Stigma surmounting more than one cell in both wings. Superior 
appendages now bifid. oes. ee ee aes ce 14, 
Stigma surmounting one cell or less in both wings........... 16. 
Abdomen 27-33 mm. long. Pale antehumeral stripe from one-third 
(young) to one-twelfth (older males) as wide as the black mid- 
dorsal, or absent entirely in very old individuals. Abdominal 
segment 8 black on dorsum with a pale transverse basal ring 
SPOOL IRE MESS, CAME ANGE SM eo i ud Nis. translata, p. 300 
Abdomen 35-37 mm. long. Pale antehumeral stripe one-half as 
wide as the dark middorsal one. Terga of abdominal segment 8 
usually entirely black, or, pale olive with a longitudinal black 
stripe on either side in young specimens.................. 15. 
Metepimeron pale or black. Abdomen with a pale longitudinal 
dorsal line on segments 3-7. Inferior appendages without a 
Lubercte’. eh SRN: ee Pana sk tee) | ae en moesta, p. 297 
Metepimeron always pale. Abdomen with the dorsum entirely 
black on segments 3-7. Inferior appendages with a tubercle at 
the end ii 2348 ie ok i ak ee eee intruda, p. 296 
