240 DRAGONFLIES OF NORTH AMERICA 
Syn: scoticum Donovan 
Length 40 mm. Expanse 50 mm. N. H. to B. C. 
A short blackish species with hyaline wings and a thick stigma. Face yellowish 
sometimes suffused with black. Cross stripe through ocelli very broad, over- 
spreading part of vertex and frons. Thorax blackish in front and yellowish with 
anastomosing black stripes upon the sides; the foremost on the humeral suture 
éostiferun 
atripes 

(stripe 3) and the others on the 2 lateral sutures, usually more or less confluent; 
from the hindmost a black streak extends to the abdomen below. Legs black. 
Wings hyaline with blackish stigma, sometimes with flavescent area at extreme 
base. Abdomen mainly black but with paler spots above and below on segment 
2; a large divided one above on 8, and smaller dorsal ones on 4-7, 8. Appendages 
black. j 
223. Sympetrum atripes Hagen 
Hag. ’73, p. 588: Mtk. Cat. p. 160: Howe ’21, p. 80. 
Length 36 mm. Expanse 56 mm. Yellowstone 
Face and vertex reddish with broad black stripes through ocelli. Thorax 
olivaceous or rufous with thin tawny pubescence and lateral sutures more or 
less distinctly marked with narrow black lines. Legs black. Wings hyaline with 
a variable amount of flavescence at base (sometimes reaching nodus of hind 
wing); stigma reddish, bordered with black veins. Abdomen reddish, the spots 
at the sides of the segments forming a black stripe, the black sometimes spreads 
upwards and envelopes the apical segments. Appendages obscurely colored, 
yellowish to black. 
47. Leucorruinia Brittinger 
The White-faced Skimmers 
These are rather small dragonflies with blackish bodies and clear 
wings, with short, broad stigmas. The face is white and shining, often 
with the whiteness of porcelain. The thorax is blackish, with something 
