OF WASHINGTON. 241 



Males. 



Scutellum bidentate, or produced into long processes over the abdo 

 men. 4 



Scutellum normal or simple , 2 



Scutellum produced into a simple long process. 



Antennae i8-jointed i. Saccharissa Kirby. 



2. Antennas 22-jointed 2. Eucharissa Westwood. 



Antennae 10 to i3-jointed. 



Antennas ramose ... 3 



Antennae simple. 



Flagellar joints monilifortn. 



Abdomen compressed, ascending. 



3. Eucharis Latreille. 



Abdomen neither compressed nor ascending. 

 First joint of tarsi much thickened. 



4. Tricoryna Kirbj. 

 First joint of tarsi very long, but not thicker 



than the others.. 5. Metagea Kirby. 



Flagellar joints cylindrical, not moniliform. 



Joints of antennae long; antennae lo-n-jointed. 



Petiole of abdomen abnormally and abruptly 

 enlarged at apex; thorax smooth. 



6. Pseudometagea Ashmead, n. g. 

 Petiole of abdomen normal, long, cylindrical; 



thorax rugose 7. Psilogaster Blanchard. 



Joints of antennae rather short; antennae 13-jointed. 



Thorax closely punctate ; right mandible with 



two teeth within, the left with one tooth 



within 8. Orasema Cameron. 



3. Antennae n-jointed, biramose 9. Rhipipallus Kirby. 



Antennae n-jointed, ramose. 



Thorax coarsely rugose ; face longitudinally striated. 



10. Chalcura Kirby. 



4. Scutellum with the processes very long, usually as long as the abdo 



men, and often very broad. 5 



Scutellum bidentate, the teeth never very long. 

 Antennae simple. 



Metanotum with hump-like elevations above the pleura. 



ii. Stilbula Spinola. 

 Antennae ramose. 



Metathorax unarmed 12. Schizaspidia Westwood. 



Metathorax with strong lateral projections or teeth. 

 Metathoracic processes curving downwards. 



13. Lophyrocera Cameron. 



Metathoracic processes consisting of two diverging 

 horizontal teeth 14. Tetramelia 'Kirby. 



