10 JOUKNAL OF ENTOMOLOGY AND ZOOLOGY 



EE. 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 

 bi-oad; 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. edwardsii BruUe 



CC. Cornus elongate, not shouldered, a ridge at each side 

 towards the base (Fig. 22). 



areolatus (Cresson) Kirby 



BB. Legs except coxffi 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 cdivardsri, not shouldered, from a lateral 

 view usually somewhat arched and widened before the 

 apex (Pig. 23).] jwvencus race cyaneus Pabricius 



AA. Abdomen more or less red. 



B. Wings hyaline, with a transverse fuscous band basad of the 

 stigma, and a fuscous apical margin ; cornus scarcely shoul- 

 dered (Pig. 25) ; only two basal segments of abdomen red. 



behrensii (Cresson) Kirby 



BB. Wings fuliginous; cornus distinctly shouldered (Fig. 24) ; 

 basal three or four abdominal segments blue-black. 



nigricornis Pabricius 



MALES 



A. Head and thorax metallic green ; posterior or sometimes all the legs 

 except their coxse rufous; abdomen except basal one or two seg- 

 ments red. [Wings yellow, especially at base.] 



areolatus (Cresson) Kirby 



AA. Head and tliorax lilack 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 tibise and tarsi, 

 the posterior knees and last two tarsal segments 

 reddish yellow; wings yellowish, smoky around 

 the outer margins; antennaj black. 



edwardsii Brulle 



