AESCHNA 139 
7 Lateral spine on 9 reaching to the middle of 10.......... juncea. 
Lateral spine on 9 not reaching to the middle of 10 
REE Ate Actes: 074i nds: ui Reef Oey aa NER Pane Aa Bae subarctica. 
8 Mentum of labium 1 and one fourths times as long as broad. . .9. 
Mentum of labium not much longer than broad............. if 
9 Lateral lobes of labium with an internal apical tooth; lateral lobe 
nearly twice as long as broad. (See Walk. ’14, p. 372)....10. 
Lateral lobes of labium with no internal apical tooth; two- 
thirds as long’ as broad. ee. 2 oe er ret ne oe oe palmata. 
10 Mentum of labium twice as long as width of its base........... 
Mbheedides S20 ee Se SRE ea seers ah} eae interrupta. 
Mentum of labium three times as long as width of its base...... 
PR Oe CE ae Se ae eer tuberculifera and umbrosa. 
i Lateral.spine:of Garudimentany 6 a. Gor 6 cyss)8i- mae ac multicolor. 
Lateral spine of 6 well developed................... californica. 
92. Aeschna caerulea Burmeister 
Burm. ’39, p. 839: Mtk. Cat. p. 113: Walk. ’12, p. 72: Howe ’19, p. 47. 
Syn: septentrionalis Burm. 
Length 47 mm. Expanse 78 mm. N. H. and Labr. to Gr. Slave L. 
Face brownish with a heavy black line on the fronto-clypeal suture, labrum 
bordered above and below with brown. Occiput yellow. Lateral thoracic pale 
stripes exceedingly narrow, stripe one bent twice at alternate right angles, second 
stripe nearly straight sometimes divided at middle, two small spots sometimes 
present between. 
93. Aeschna sitchensis Hagen 
Hag. ’61, p. 119: Mtk. Cat. p. 114: Walk. ’12, p. 77: Whts. ’17, p. 99: Walk. 
121, p. 221. 
Length 51 mm. Expanse 80 mm. N. F. and Mich. to Alaska 
Face dull greenish or olivaceous with a black line on the fronto-clypeal suture 
increasing in width laterally. Anteclypeus dark, labrum bordered narrowly above 
wa SS 
caerulea sitchensis 

and broadly below, with black. Lateral thoracic pale stripes narrow and sinuate; 
the first pair bent twice at alternate right angles. Legs dark brown, femora 
darker beneath. Wings hyaline, costa and stigma brown. 
