148 DRAGONFLIES OF NORTH AMERICA 
dull and one was taken in flight during a light rain.”’ Ris (’85) has given 
an interesting account of the habits of this holoarctic insect in Swit- 
zerland. 
106. Aeschna subarctica Walker 
Walk. ’08, p. 385, 390: 712, p. 93. 
Length 57 mm. Expanse 90 mm. Manitoba to Atl. Coast 
Face yellow with a heavy black line on the fronto-clypeal suture, broadest 
in the middle; anteclypeus dark brown and labrum bordered narrowly above 
and broadly below with black; occiput yellow. Lateral thoracic pale stripes 
excavated by an obtuse angle; the first stripe bearing a posterior spur. Legs 
reddish brown, femora paler beneath. Wings hyaline, costa yellow, stigma 
brown. 
Mr. Walker says that Aeshna subarctica is closely related to Aeshna 
juncea....and that he was unable to distinguish them in flight; nor 
could he detect any differences in habits. 
107. Aeschna tuberculifera Walker 
Walk. ’08, p. 385, 387: 712, p. 152: Howe 19, p. 48: 23, p. 124: Garm. ’27, p. 187. 
Length 58 mm. Expanse 98 mm. N. H. and Ont. to Wis. 
Face olivaceous with a fine brown line on the fronto-clypeal suture; labrum 
with very narrow upper and lower marginal black lines. Occiput pale bluish 
green, the anterolateral margins black. Legs dark brown. Wings hyaline, some- 
times slightly flavescent at the base; costa and stigma brown. 
108. Aeschna canadensis Walker 
Walk. ’08, p. 382, 389: Mtk. Cat. p. 109: Walk. ’12, p. 185: Howe ’19, p. 48: 
23, p. 123: Garm. ’27, p. 182. 
Syn: clepsydia Selys, juncea Wmsn., verticalis Walk. 
Length 58 mm. Expanse 92 mm. N. E. U. S. to Wash. 
Occiput yellow margined on sides with black. Face bluish or yellowish green; 
frons olivaceous, darker above, paler near ocular band. Fine brown line on fronto- 
tuberculifera 

verticalis canadensis 
clypeal suture. Anteclypeus dark brown in center. T spot heavy, strongly convex 
in front; stem broad, sides straight. Dorsal thoracic pale stripes straight and 
broad. Lateral pale stripes broad, the first one deeply constricted on its anterior 
margin by a rectangulate excavation, and with a posteriorly projecting spur 
