14 Eev. T. A. Marshall's monograph of 



(3) 4. Abdomen, after segment 1, not wholly 



testaceous ; partly black. 



(6) 5. Wings blackish ; stigma black ; terebra 



2 as long as the body . . . . 4. i7iinutator, Fab. 



(5) 6. Wings hyaline ; stigma pale ; terebra 



2 shorter than the body. 

 (8) 7. Antenna3 ^ 29-jointed ; terebra J as 



long as the body ; stigma fusco-tes- 



taceous . . . . . . . . 1. pectoralis, Wesm. 



(7) 8. Antenna) <y40-jointed; terebra J much 



shorter than the body; stigma luteous 3. erytJtrostictus, n. s. 

 (2) 9. Metathorax carinated from base to apex. 

 (11) 10. Head and thorax black ; coxa) black ; 



4 posterior femora more or less black 6. longicolUs, Wesm. 

 (10) 11. Head and thorax partly testaceous ; 



coxa3 testaceous, often with a black 



spot ; 4 posterior femora testaceous 5. fulvipcs, Nees. 



(1) 12. Suturiform articulation straight. 



(14) 13. Head and thorax varied with testaceous ; 



terebra J ^ abdomen . . . . 7. varicgator, Nees. 



(13) 14. Head and thorax entirely black ; tere- 

 bra 2 J abdomen 8. niijmtus, Wesm. 



Section ii. Segments* 1 — 3 sculptured ; the rest 

 smooth. 



(2) 1. Abdomen conspicuously black and tes- 



taceous . . . . . . . . 11. erraticus, Wesm. 



(1) 2. Abdomen black, except the narrow mar- 

 gins of segment 1, or 1 — 2. 



(4) 3. Metathorax carinated (sometimes sub- 



obsoletely) ; suturiform articulation 



straight . . . . . . . . 21. Satanas, Wesm. ^ . 



(3) 4. Metathorax not carinated ; suturiform 



articulation sinuated . . . . . . 12. exarator, n. s. 



Section iii. Segments 1 — 2 sculptured; the rest smooth. 



(4) 1. Wings blackish, or fuscous. 



(3) 2. Abdomen testaceous, with or without a 



few round discal spots . . . . 13. triangularu, Nees. 



(2) 3. Abdomen black, testaceous at the base 



and sides . . . . . . . . 14. Robcrti, Wesm. 



(1) 4. Wings hyaline, or only slightly infus- 



cated. 

 (6) 5. Disk of the mesothorax, partly or 



entirely, testaceous . . . . . . 15. Iccvigattis, Ilatz. 



(5) G. Disk of the mesothorax black. 



(12) 7. Abdomen testaceous in the middle, black 

 at the base and apex. 



* Cf. sp. 16, B. mediator, Nees, ^ . 



