1899.] NATURAL SCIENCES OF PHILADELPHIA. 4l 



The perplexing variations in plumage exhibited by this species 

 are the cause of its many synonyms. It does not yet seem to be 

 properly understood. 



Burnesia bairdii (Cass.). 



Drymoka baii'^ii Cass. Proc. Acad. Nat. Sci. Phila., 1855, p. 327. 



17,502. Moonda river, W. Africa. DuChaillu. Ti/pe. 

 Hylia prasina (Cass.). 



Sylvia prmiiKi. Cass. Proc. Acad. Nat. Sci. Pliila., 1855, p. 325. 



17,479. (^ Moonda river, W. Africa. DuChaillu. 'J ype. 



17,498. Moonda river, W. Africa. DuChaillu. 

 Eremomela caniceps (Cass.). 



(Jamnvopttra caniceps Cass. Proc. Acad. Nat. Sci. Phila., 1859, p. 38. 



17,471. cf Cape Lopez, W. Africa. DuChaillu. Type. 

 Euprinodes schistaceus Cass. 



Eapriiiodes schistaceus Cass. Proc. Acad. Nat. Sci. Phila., 1858, p. 38. 



17,468. (S" River Camma, W. Africa. DuChaillu. Type. 

 Sylvietta virens (Cass.). 



Sylvietta cirens Cass. Proc. Acad. Nat. Sci. Phil., 1859, p. .'59. 



13,906. Cape Lopez, W. Africa. DuChaillu. Type. 

 Camaroptera brevicaudata (Cretzch.). 



Syiicopta tincta Cass. Proc. Acad. Nat. Sci. Phila., 1855, p. 325. 



17,475. Moonda river, W. Afric i. DuChaillu. Type. 

 Turdinus fulvescens (Cass.). 



Tiirdirostris fulvescens Cass. Proc. Acad. Nat. Sci. Phila., 1859, p. 54. 



13,846. (^ Camma river, W. Africa. DuChaillu. I'ype. 



17,369. $ Camma river, W. Africa. DuChaillu. 

 Macrospbenus flavicans Cass. 



Macrosphenus flacicans Cass. Proc. Acad. Nat. Sci. Phila., 1859, p. 42. 



17,350. c? Camma river, W. Africa. DuChaillu. Type. 



17,349. ? Camma river, W. Africa. DuChaillu. 

 Xenocichla notata (Cass.). 



Tricophoi'KS notatiis Cass. Proc. Acad. Nat. Sci. Phila., 1856, p. 159. 



17,113. (^ Moonda river, W. Africa. DuChaillu. 'Type. 



17,115. 9 Moonda river, W. Africa. DuChaillu. 

 Xenocichla leucopleurus (Cass.). 



Phyllostrophus leucopleurus Cass. Proc. Acad. Nat. Sci. Phila., 1855, p. 

 328. 



17,031. Kiver Muni, W. Africa. DuChaillu. Tijpe. 

 Xenocichla indicator (Verr). 



Tricophorus leucurus Cass. Proc. Acad. Nat. Sci. Phila., 1855, p. 328. 



The type of this species cannot be found. 



Criniger tricolor (Cass.). 



Tricophorus tricolor Cass. Proc. Acad. Nat. Sci. Phila., 1857, p. 33. 



17.012. Muni river, W. Africa. DuChaillu. Type. 



17.013. Muni river, W. Africa. DuChaillu. 



