Hans von Berlepsch on the Genus Cyclorhis. 91 



but I may remark that a young bird of C. virenticeps, ScL^ 

 in my collection, has the upper and under mandible uniform 

 blackish, thus differing from adults of that species, which 

 have the upper mandible pale-coloured. May not the colora- 

 tion of the bill in the new species be due to immatvirity also ? 

 Otherwise the affinities of the new species are certainly with 

 C. nigrirostris , as Sclater remarks, not with C. virenticeps. 



In consequence of what I have said in the preceding pages, 

 the species of Cyclorhis should, according to my views, stand 

 as follows : — 



-^ 1. Cyclorhis flaviventris, Lafr. S. Mexico, Guate- 

 mala. 



? 1 «. Cyclorhis flaviventris yucatanensis, Ridgw. 

 Yucatan. 



-f 2. Cyclorhis flavipectus, Scl. Colombia, Venezuela, 

 Trinidad. 



— 2 a. Cyclorhis FLAViPECTUs suBFLAVESCENs (Cab.). Costa 

 Rica, Veragua. 



-I- 2 b. Cyclorhis insularis, Ridgw. Cozumel Isl. 



4- 3. Cyclorhis guianensis (Gmel.) . Cayenne, Brit. Guiana, 



Amazonia sup. (et infer. ?). 



-.' 4. Cyclorhis cearensis, Baird. Brasil. or. (Para? to 

 Bahia), Goiaz. 



^5. Cyclorhis viridis (Vieill.). Paraguay, Tucuman, 

 Salta, Bolivia. 



-^ 6. Cyclorhis wiedi, Pelzeln. Matogrosso, Parana. 



-^ 7. Cyclorhis ochrocephala, Tschud. Rio Janeiro, Rio 

 Grande do Sul, Argentina or. & occ. 



,' 8. Cyclorhis virenticeps, Scl. Ecuador occ, Peru sept, 

 occ. 

 . 9. Cyclorhis contrerasi, Tacz. Peru sept, in montibus. 



10. Cyclorhis nigrirostris, Lafr. Bogota, Antioquia. 

 -f?ll. Cyclorhis ATRiRosTRis, Scl. Ecuador. 



According to my views the following key for determining 

 the species of Cyclorhis would be the most natural one : — 



