1897.] NATURAL SCIENCES OF PHILADELPHIA. 235 



Antennae entirely black, 6. 



6. Antennas distinctly longer than head and thorax united, . . . 



9 tyrannicus Sin. 



Antennas at the most about equal to the combined length of 

 head and thorax, 9 brevicomis n. sp. 



7. Apical margin only of wings dark, 8. 



Almost the outer half of wings blackish, their extreme tips pale 



(last seven joints of antennae orange) . . 9 pictipennis n. sp. 



8. Pronotum unusually short ; antenna? thick, 



9 vielanosoma Kohl. 



Pronotum not unusually short, its length in the middle nearly 

 equalling one-half the anterior width ; antennas slender, dis- 

 tinctly longer than head and thorax, . . . .9 similis n. sp. 



9. Middle segment emarginate posteriorly (maculation of abdomen 



reddish or reddish-yellow), 10. 



Middle segment rounded or truncate posteriorly, 12. 



10. Head and pronotum not maculated, 11. 



Inner and posterior orbits, sides of clypeusand line on pronotum 



yellowish, 9 macrostoma Kohl, 9 dubius n. sp. 



11. Abdomen maculated with red, 9 saevissimus Sm. 



Abdomen maculated with white, 9 rixosus Sm. 



12. Head immaculate, 13. 



Head maculated, 14. 



13. Wings subhyaline, a fuscous cloud including marginal except 



base, second submarginal and beyond ; greater part of dorsal 



surface of abdomen reddish, 9 nubilipennis n. sp. 



Wings fuscous, with purplish iridescence; second dorsal segment 

 with a transverse reddish band, .... obscuripennis n. sp. 



14. Head, thorax and abdomen richly maculated with yellow ; wings 



yellow, apical third fuscous ; basal antennal joints orange, 



$ crassicornis Sm. 



Head and thorax black, the inner orbits, clypeus at sides and 



spot above insertion of antennas, yellow ; wings fusco-hyaline, 



with apex of anteriors dark fuscous, apical antennal joints 



fulvous beneath ; abdomen maculated with ferruginous, 



9 maeulifrons Sm. 



Pseudagenia amabilis Tasch. 

 Agenia amabilis Taschenberg, Zeits. f. d. ges. Naturw., XXXIV, 45. 



One specimen from Rio de Janeiro (November). 



