( 323 ) 



If we relegate the species of the hist two categories (23 + 50) to a hypothetical 

 list, theu we have at least 



626 less 73 = 553 certain species 



which are kuowu to inhabit French Guiana. 



The specimens collected by Mr. Gherrie are referable to 234 species, this being 

 not qnite half the number of the known Cayenne species. 



The following species and conspecies are peculiar to F'rench Guiana as far as we 

 know : 



? 1. Heterocercios luteocepkalas — of doubtful occurrence in Cayenne. 



2. Lipaugus immiiiuhis. 



3. Automoliis obscurus. 



4. Hijlexetastes perroti — replaced by a nearly allied form in the Madeira district 



{fide Helimayr in litt.). 

 ? 5. Xiphorhi/iiclias dorsoiminaculatiis — of doubtful occurrence in Cayenne. 



6. Terentira eluopteryx — replaced in Surinam and British Guiana by the nearly 



allied T. spodioptila. 



7. Formicivora consobrinu inicrosticta — replaced by nearly allied forms in 



Brazil, etc. 



8. Myrmelastes melanothomx. 



9. Cercomacra nigrescens. 



10. Tkrenetes antoniae. 



11. Pkacthornis malaris. 



? 12. Tkalufunia furcata — replaced hy a nearly allied form in Brit. Guiana. 



13. Thalurania scapulata. 

 ? 14. (Montophoriis guianemis — replaced by a nearly allied form in Brit. Guiana. 



The following species are apparently pecnliar to Cayenne and Surinam : 



1. Todirostnim/umifroiis penardi. 



2. Pipra Serena — replaced in Brit, (juiana by F. suacissima. 



3. Fachyrhainpliiia gtirinaiiius. 



4. Ficumiim bujfoni — replaced in Brit. Guiana lay P. bujf'oiu undulatus. 

 ? 5. Ficumnus minutissimus. 



The following species are perhaps pecnliar to the three Guianas — viz. Cayenne, 

 Surinam and Biit. Guiana. 



1. Fachysylvia Ititeifrons. 



2. Microcercu/us bambln. 



3. Tanagrella velia, replaced by T. c. signata Hellm. near Para. 



4. Calospiza gijrola. 



5. Todirostrum pictum. 



6. Pipra gutturalis. 



7. lodopleiira Jiisca. 



8. Xipkorhgnckus procurtoides. 



l». Dendrexetastes rufigala — replaced at Para by a nearl\ allied ibrm. 



