258 CHAS. A. BLAKE. 



122. Mutilla vigilans, Say, Bost. Jour. I, p. 296. 3. 



Male. — Black; second abdominal segment, except the anterior and posterior 

 margins, rufous; wings purplish-black, marginal cell truncate at tip; eyes 

 ovate, emarginate. Length 7 lines. — (Say.) 



^ai.— Middle States. 



AGAMA. nov. gen. 



Body unieolorous, smooth and shining. Head transverse ; eyes 

 large, round and prominent; ocelli large ; antennae long and slender. 

 Thorax narrowed posteriorly. Wings hyaline, sometimes slightly 

 clouded, stigma prominent. Abdomen sparsely clothed with pubescence, 

 basal segment more or less petiolate, apex % furnished with two minute 

 recurved spines. Female unknown. 



The species may be tabulated as follows : 



Marginal cell long, lanceolate, gradually curved to apex which is pointed. 

 Body entirely black, with long pale pubescence. 



Wings yellow, with fuscous spot on posterior margin 1. mendica. 



Wings subhyaline, with fuliginous spot on posterior margin 2. Orizaba. 



Head, thorcx and first abdominal segment black, with pale pubescence; 

 mesothorax and abdomen ferruginous, with golden pubescence ; 



anterior wing broadly fuliginous at apex 3. imperialis. 



Body black ; thorax and first abdominal segment honey-yellow..4. Nokomis. 

 Body fulvo-ferruginous or honey -yellow. 



Abdomen with pale 3/e//oiPisA pubescence; wings faintly tinged with yel- 

 lowish, anterior j)air with dusky spot on anterior mar- 

 gin 5. unicolor. 



Abdomen with white pubescence. 



Second abdominal segment coarsely punctured ; anterior wing bifasciate 



with dusky on apical half fi. Banaas. 



Second abdominal segment smooth and shining, sparsely, finely, or 

 not at all punctured. 

 Wings varied at apex with dusky spots; apical segments of abdomen 



blackish, with long white pubescence 7. clara. 



Wings hyaline, with a faint dusky spot on posterior margin of anterior 

 pair. 

 Abdomen slender ; head scarcely wider than thorax ; legs pale, tips 



of femora blackish 8. melicausa. 



Abdomen robust; head broader than thorax; femora generally 



black 9. Tapajos. 



Wings hyaline, immaculate. 



Head narrowed behind eyes, vertex rugose 10. triangularis. 



Head broad behind eyes, vertex smooth. 



Two submarginal cells 11. concolor. 



Three submarginal cells. 



Second abdominal segment with lateral black line or 



spot 12. pallida. 



Second abdominal segment immaculate 13. hyalina. 



Marginal cell short, not extending far beyond stigma, apex more or less abru[)tly 

 rounded or truncated. 



