10 
AA. 
JOURNAL OF ENTOMOLOGY AND ZOOLOGY 
KE. In the front wings M, separating from M,; 
much closer to R, than to R,; wings vary- 
ing from slightly smoky to almost viola- 
ceous; body as in cyaneus and other 
species; the thorax not exceptionally 
broad; second segment of the posterior 
tarsus longer than the two following 
united; impressed basin in front of the 
cornus shallow, and as long or longer than 
wide. edwardsw Brullé 
CC. Cornus elongate, not shouldered, a ridge at each side 
towards the base (Fig. 22). 
areolatus (Cresson) Kirby 
BB. Legs except cox yellow or reddish yellow. [Wings nearly 
hyaline, or somewhat infuscated, especially along the outer 
margin; cornus shorter than in areolatus, but distinctly 
longer than in edwardsii, not shouldered, from a lateral 
view usually somewhat arched and widened before the 
apex (Fig. 23).] juvencus race cyaneus Fabricius 
Abdomen more or less red. 
B. Wings hyaline, with a transverse fuscous band basad of the 
stigma, and a fuscous apical margin; cornus searcely shoul- 
dered (Fig. 25) ; only two basal segments of abdomen red. 
behrensti (Cresson) Kirby 
BB. Wings fuliginous; cornus distinctly shouldered (Fig. 24) ; 
basal three or four abdominal segments blue-black. 
nigricornis Fabricius 
MALES 
Head and thorax metallic green; posterior or sometimes all the legs 
except their cox rufous; abdomen except basal one or two seg- 
ments red. | Wings yellow, especially at base. ] 
areolatus (Cresson) Kirby 
AA. Head and thorax black or blue-black, or if somewhat green, the 
body and legs not colored as above. 
B. Apical segment of abdomen blue or black. 
C. Seventh dorsal abdominal segment blue or black. 
D. Only the fifth and sixth dorsal abdominal seg- 
ments yellow; legs brown except the anterior 
and middle femora at tips, their tibie and tarsi, 
the posterior knees and last two tarsal segments 
reddish yellow; wings yellowish, smoky around 
the outer margins; antenne black. 
edwardsu Brullé 
