( 428 ) 
(E) Upper Amazonian species ranging to the right bank of the Rio Madeira, 
but not occurring farther east. 
. Lanio versicolor. 
. Automolus subulatus subulatus, 
- Thamnophilus nigrocinereus tschudii, 
. T. doliatus subradiatus. 
. Myrmotherula hauxcwelli hauawelli. 
. Hypoenemis naevia theresae. 
. H. poecilinota griseiventris, 
. H. hemileuca. 
8. Conopophaga aurita. 
» 2. Thlypopsis sordida amazonum (?). 19. Chaetura cinereiventris sclateri. 
3. Saltator coerulescens azarae. 20. Phoethornis philippii, 
4. Muscisaxicola fluviatilis, 21. Prionornis p. pyrrholaemus. 
5. Todirostrum chrysocrotaphum. 22. Monasa morphoeus peruana, 
6. T. latirostre. . 23. Nonnula rubecula cineracea. 
7. Chiroxiphia regina. 24. Capito aurantiicollis. 
8. Synallaxis propinqua. 25. Ramphastos cuvieri cuvieri, 
9. Ancistrops strigilatus. 26. R. culminatus. 
7. Pteroglossus beauharnaesii. 
28. Conurus weddellii, 
9. Pionites leucogaster xanthomerius. 
0. Leucopternis schistacea. 
31. Otus watsonii. 
2. Odontophorus stellatus. 
3. Ortalis guttata. 
17. Ramphocaenus melanurus amazonum. 34, Penelope jacqtiacu. 
(F) Upper Amazonian species ranging to the left bank of the Rio Madeira, 
but not occurring on the right. 
1, Calospiza nigrocineta, 
2. Knipolegus sclateri. 
3. Pipra coelesti-pileata. 
4, Anoplops salvini. 
5. A. melanosticta. 
6. Phlegopsis erythroptera, 
7. Bucco tamatia pulmentum. 
8. Pteroglossus flavirostris mariae. 
» 9. Crypturus bartletti. 
(G) Species of the Rio Madeira represented by nearly allied races on the 
Guaporé. 
Rio MAperra, Rio Guapors. 
1. Saltator coerulescens azarae. 1. S. coerulescens coerulescens. 
2. Paroaria gularis gularis. 2. Paroaria gularis cervicalis. 
3. Lampropsar tanagrinus tanagrinus, 3, L. tanagrinus violaceus. 
4. Ramphocaenus melanurus amazonum. 4, R. melanurus sticturus. 
5. Thalurania balzuni. 5. T. eriphile baeri. 
In concluding, I have to thank the Hon. Walter Rothschild and Dr. E. Hartert 
for entrusting me with the study of the interesting material and for publishing the 
report thereon in this periodical. I am also under great obligations to my kind 
friend Dr. von Lorenz, of Vienna, who lent me numerous specimens from Natterer’s 
collection, and to Count Berlepsch for similar favours and valuable advice in difficult 
questions, 
