OF WASHINGTON. 239 



short or only slightly developed. The hind wings are propor 

 tionately larger and wider at base than in the generality of the 

 other families, the costal cell being distinct. 



The abdomen is always distinctly petiolated, the second seg 

 ment abnormally enlarged and usually enclosing the following 

 segments, or the greater part of them, while the female possesses 

 a very broad saw-like ovipositor, the blade of which is very simi 

 lar to that of a small saw-fly. 



TABLE OF GENERA. 



Females. 



Antennae i3-jointed or less 2 



Antennae 14-jointed or more. 



Scutellum simple; antennas i6-i8-jointed. 



i. Eucharissa Westwood. 



Scutellum produced into a single long process at apex, and longi 

 tudinally striated ; antennas 14-jointed.... 2. Saccharissa Kirby. 



2. Scutellum bidentate, or greatly produced into long processes over the 



abdomen 4 



Scutellum simple, neither bidentate nor produced into long processes. 



Antennae not moniliform 3 



Antennae moniliform. 



Abdomen compressed, ascending... .3. Eucharis Latreille. 

 Abdomen neither compressed nor ascending. 



P^irst joint of hind tarsi much thickened; antennae 



n-jointed 4. Tricoryna Kirby. 



First joint of hind tarsi very long, but not thicker 

 than the others 5. Metagea Kirby. 



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



Thorax smooth, polished; petiole of abdomen abruptly enlarged 



at apex 6. Pseudometagea Ashmead. 



Thorax rugose ; petiole of abdomen normal, long, cylindrical. 



7. Psilogaster Blanchard. 

 Joints of antennae short; antennae i3-jointed. 



Thorax not greatly elevated, punctate, with complete parapsidal 

 furrows; mandibles long, acute at tip, the right with two teeth 

 within, the left with one tooth within... .8. Orasema Cameron. 

 Joints of antennae serrate. 



Antennae 13-jointed 9. Rhipipallus Kirby. 



Antennae u-jointed 10. Chalcura Kirby. 



4. Scutellum with the processes usually as long as the abdomen and 



sometimes very broad and covering the abdomen 5 



Scutellum bidentate, the processes never very long. 

 Metathorax unarmed. 



Metanotum with hump-like elevations above the pleura. 



ii. Stilbula Spinola. 

 Metanotum simple, without such elevations. 



12. Schizaspidia Westwood. 



