THE CANADIAN ENTOMOLOGIST. 277 



1. Black, or rufous, or both 3. 



Metallic blue ; species large; antennte of female flattened before 

 the apex ; joints of flattened portion, broader than long ; 

 metathoracic spines very prominent. 



2. Areolet on metathorax subhexagonal (fig. 13,1); apical line not angled; 



scutellum of ? white ; antenntB of ^ without white 



annulus ci.arus, Cresson. 



Areolet on metathorax shaped as in fig. 2 ; scutellum of ^ black ; 

 antennae of (^ with white annulus metallicus, n. sp. 



3. Thorax black 4. 



Thorax more or less rufous i y. 



4. Abdomen more or less rufous. 



Abdomen entirely black, antennas with pale annulus ; spot on 

 scutellum white 5. 



5. Metathorax with areola polished, shining in centre ; legs red, apex 



femora, tibise and tarsi black. Length 5 mm. Prov. Quebec, 



Canada *rubricapensis, Provancher. 



Metathorax with median and two lateral apical areas transversely 

 reticulate ; superior area glabrous ; tergum of petiole polished ; 

 postpetiole shagreened ; legs clear, ferruginous, with apex of hind 

 tibiffi and tarsi black. Length 9mm. Idaho. . . .*incabus, Davis. 



6. Second segment only of abdomen red 7. 



More than second segment of abdomen red 8. 



7. Wings hyaline; anterior orbits enlarged below ; anfennce with white 



annulus, third joint very short and red ; metathorax finely 

 punctured^ pubescent, carinse not prominent ; legs black, the four 

 anterior red in front ; posterior femora red at base, and a more or 

 less distinct red ring at base of posterior tibiae ; petiole polished, 

 long ; abdomen with white spot at its extremity ; second and base 

 of third segment stained red. Length 

 7 mm *scuT£LLATUS, Provaucher. 



8. Antennae with pale annulus 12. 



Antennae without pale annulus ; scutellum black 9. 



9. Petiole aciculated 10. 



Petiole polished ; abdomen entirely rufous (in one specimen darker) ; 



face white, with median black band ; metathoracic spines and 

 carinae but slightly marked ; discocubital nervure with a more or 

 less distinct stump of a vein. A consors, Cresson. 



