—3— 



Vertex produced with an acute margin, flat or slightly convex 4. 



Vertex not produced, short, thrice keeled. 



Thorax elevated on the disk, compressed with an acute keel on each side. .3. 

 Thorax transversely convex. 

 Ocelli distinct. 



Wings with two series of transverse moderately regidar veins, the 

 longitudinal vein behind and between these series, simple, not 



forked G. 6. Dascalia, Sial. 



Wings between the clavus at apex and tlie intercostal longitudinal vein 

 with a regular series of distinct transverse veins, before this series 

 nowdiere wanting in irregularly disposed veins, but between the 



second series, veins regularly transverse ; head truncate 



Ci. 7. Ormenis, Still. 



Wings without series, or then with irregular transverse veins, series in 



that case not reaching the intercostal vein ...G. 8. Flata, Fabr. 



Ocelli wantnig ; transverse veins of wings irregularly ai ranged 



(!. 9. Pceciloptera, Latreille. 



3 Veins of wings irregularly transversely arranged (i. 10. Sarpanta, Slitl. 



4 Head triangularly produced ; frons flat, convex nt base ; wings with irregvdar 



transverse veins ; marginal suture straight, the angle of the suture very longly 



produced . G. 11. Carthaca, Stal. 



Corium hardly longer than the clavus. 



Head transversely quadrately produced, anteriorly somewhat roundedly trunc- 

 ated ; frons somewhat concave G. 12. Phlebopterum, Still. 



Head truncate ; wings reaching somewhat beyond the apex of abdomen 



G. 13. Bryllis, Still. 

 Corium nearly twice the length of the clavus. 



Wings elongated, narrowed, very gradually narrowed toward the apex 



(j. 14. Cyarda, Walker. 



5 Antennae somewhat elongated, reaching anteriorly beyond the margins of the 



cheeks ; ocelli subobsolete or wanting G. 15. Copsyrna, Still. 



Antennas short, distinct. 



Transverse veins of wings irregularly arranged. 



Vertex flat, produced, but the tlisk of thorax and scutellum not lying in the 



same plane G. 16. Siphanta, Still. 



Vertex not prominent, but the frons at base prominently gibbous ; thorax and 



scutellum convex G. 17. Gyaria, Still. 



Transverse veins in a regular contiguous series toward apex ol wings, between 



the apex of the clavus and the uitercostal veins G. 18. Petrusa, Still. 



Clavus without a distinct transverse vein. 



Wnigs with an oblique transverse vein before the middle, between the interior 



ulnar veins and the ramus of the exterior ulnar veins 



G. 19. Atella, Slill. 



»'i Frons and clypeus without a median keel 8. 



Frons and clypeus with a median keel. 



Clypeus and frons with a suture between , 7. 



Clypeus and frons without a suture between. 



Vertex triangular with a median keel ; mesonotum lozengoidal with a median 

 keel and straight diverging lateral keels ; rostrum prolonged nearly 

 between the middle coxce G. 20. Hemitropis, Fieber. 



