468 PROCEEDINGS OF THE ACADEMY OF [1893. 



Female with a well developed pygidial area ; marginal cell 

 shorter than the first submarginal ; antennae of $ more or less 



dentate Pisonopsis. 



4— Anterior wings with but two submarginal cells; mandibles eniar- 

 ginate on outer margin; first and second submarginal cells each 



receiving a recurrent uervure Miscophus. 



Anterior wings with three submarginal cells 5 



5 — Second submarginal cell petiolate 6 



Second submarginal cell not petiolate 8 



6— First and second submarginal cells each receiving a recurrent 

 uervure; mandibles emarginate without; eyes converging 



toward the vertex Peenoculus. 



Both recurrent veins received by the second submarginal cell; 



mandibles not emarginate 7 



7 — Antenme long and slender ;eyes strongly converging to the vertex; 



last dorsal segment of 9 without a pygidium; $ unknown 



Niteliopsis. 



Antenme rather short, subclavate; eyes diverging towards the 

 vertex; last dorsal segments of both sexes with a pygidium 



BOTHYNOSTETHUS. 



8 — Marginal cell with an appendiculation, lanceolate or truncate 9 



Marginal cell without an appendiculation, lanceolate; inner eye 



margins almost parallel; middle tibiae with two spurs 



Dienopeus. 



9 — Ocelli round, well developed 10 



Hind ocelli distorted, more or less obsolete 12 



10 — Middle tibia? armed with two spurs at apex 11 



Middle tibhe with but one spur; mandibles distinctly emarginate 

 on outer margin; second submarginal cell receiving both recur- 

 rent nervures Lyroda. 



11 — Eyes of the 9 converging towards the top, those of the $ touch- 

 ing on the vertex; marginal cell more than twice longer than 

 broad; second submarginal cell receiving both recurrent nerv- 

 ures Astatus. 



Eyes of both sexes converging towards the top, those of the $ 

 not touching on the vertex; marginal cell not twice as long as 

 broad; first and second submarginal cells each receiving a re- 

 current uervure Diplopeectron. 



12 — Front and face more or less raised along the eye margins 13 



Front and face not at all raised along the inner eye margins 15 



13 — Mandibles armed with one or two teeth within 14 



Mandibles not dentate within; outer side of anterior tibiae armed 

 with strong spines; pygidium (9) not pubescent Larra. 



14 — Pronotum drawn under the dorsulum, especially at the sides; 

 metanotum longer than the dorsulum; anterior femora of $ not 

 emargiuate near the base; pygidial area covered with a hoar- 

 frost-like pile Notogonia. 



