10 
tt 
12 
13 
AESCHNA 137 
Labrum with a black upper border and a brownish lower margin; 
ispotewith Jong stem.(Fig..32): so suds cs caerula, p. 139 
Labrum margined narrowly with black above and below; 7 spot 
With short-stem...: winceonlamesarteds sitchensis, p. 139 
Ventral tubercle present on segment 1...................... 4, 
Ventral tubercle not present on segment 1................... 6. 
Fronto-clypeal stripe present................ californica, p. 140 
Bronte-clypeal stripe not-presentisre, 202 foo. ee ok 5. 
Ventral tubercle prominent; vein M/a rising beyond the stigma; 
outer side of anal loop longer than the inner side of triangle 
to eae en es | he multicolor, p. 141 
Ventral tubercle low; M/a rising under the distal end of stigma; 
outer side of anal loop equal to the inner side of triangle..... 
RENT LTEMEE LT os Sty PROS ROS Ae mutata, p. 142 
Dorsum of 10 smooth, without tubercles or spines; anal triangle 
ofmale three eelledtpere os Lee aieet ety Seyret iE 
Dorsum of 10 with a median tooth between one or two pairs of 
spines; anal triangle of male two celled.................. a. 
Rearet headebineiee =) Cis Ab ics% rie Ado alo) seuietd wdews 8. 
Rear of head with some brown or yellow.......umbrosa, p. 142 
Abdominal spots ML (Fig. 32) on 3-6, re .walkeri, p. 143 
Abdonunalspots Wie Gils Se See ks ee is we eu cake 9. 
Abdominal spots PL (Fig. 32) on 5-8; lateral thoracic pale stripes 
of female entirely surrounded by black......... arida, p. 144 
Abdominal spots PZ on 3-5, 6 or 7; lateral stripes of female not 
surrounded by black. 32 4; os: deseesa eee ee beset 10. 
Abdominal spots MD on 3-7; cross bar of T spot straight, its 
stem. parallel sided...) «5.0 «eee eee palmata, p. 144 
Abdominal spots MD on 3-8; cross bar of T spot curved, its stem 
WIGeT ERE: cio esl d ok. Rete gee hee constricta, p. 145 
Dorsal thoracic stripes reduced to 1 or two spots.............. 
Fe MMR AR Pech Sti: Doge ah «521% 0 nt «oe a interrupta, p. 145 
Dorsal thoracic stripes precent.« ......... .4,cc0eeaaee ee ee 12. 
Black stripe on fronto-clypeal suture...................... 13. 
No black stripe, sometimes a fine brown line, on fronto-clypeal 
SUEULS 1 ors aah. 2 iach pe edrtigls? citi datnwio Spee ee eee 16. 
Pale spots between two lateral thoracic stripes large and con- 
spicuous, sometimes confluent with first lateral stripe; fronto- 
clypeal stripe not reaching lateral margins. . .clepsydra, p. 146 
PIG HE WOVE S506 eee ook oho ee ee 14. 
