568 On a New K'vH/ji.sJwr of the Genus Corytliornis. 



S. Thome bird the crown has malachite-greeu bars down 

 to the forehead. But the most remarkable characters 

 appear in the young birds — a fact of considerable importance. 

 It is well known that the young of allied species are usually 

 alike, and that the adults become different, shewing the 

 specific characters. But, on the contrary, in the S. Thome 

 bird the adult examples are very similar to those of the allied 

 species, and greater differences are shown in the young. I am 

 not acquainted with a similar state of affairs in any other bird. 



It appears that specimens of the genus Corijthoniis from 

 S. Thome, besides those collected by Signor Fea, are only to 

 be found in the Museum of Hamburg, collected by Weiss, 

 as mentioned by Hartlaub, and in the Museum of Lisbon, 

 which has examples procured by several collectors, especially 

 by Mr. F. Newton (as mentioned by Prof. Barboza du 

 Bocage and De Sousa) ; but all these ornithologists have 

 wrongly identified the S. Thome bird with C'„ galerita. 

 Prof. Bocage also mentions a young female, but makes no 

 allusion whatever to the very peculiar juvenile characters ! 



To these remarks I add a Latin description of the new 

 species and the references which appear to belong to it, 



CORYTHORNIS THOMENSIS, Sp. UOV. (Plate XIII.) 



C. ualeritfe similis, sed gastrseo castaneo, loris nigris, regione 

 malari castanea paullum nigro tincta, tseniisque trans- 

 versis pilei cseruleo-viridibus, sen malachitaccis, diversa. 

 Long. tot. mm. 145-147, al. 59, caud. 28, rostri culm. 32. 



Av.jr. Regione malari, loris, capitis lateribiis, pectore medio 

 ejusque lateribus fusco-nigris ; dorso maculis cseruleo- 

 malacliitaceis notato ; rostro nigro. 

 Alcedo C(eruleocephala Hartl. (nee Gm.) Beitr. Oru. 



Westafr. in Wiebel's Yerz. pp. 1, 18 (S. Thome, Wtiss) 



(1850) ; id. Contr. Orn. 1850, p. 131 (S. Thome) ; id. Abh. 



naturw. Ver. Hamb. ii. 2, pp. 1, 18 (S. Thome, Weiss) (1852) ; 



id. Orn. AVestafr. p. 36 (S. Thome, Weiss) (1857) ; Sousa, 



Jorn. Sc. Lisb. n. xlvii. p. 151 (S. Thome) (1888). 



Corytliornis ccsruleocepliala, Boc. (nee Gm.) Jorn. Sc. 



Lisb. i. p. 134 (S. Thome, Dr. Nimes) (18S7) ; Sharpe, Mon. 



Alced. p. 39 (part.) (1869) ; Boc. Jorn. Sc. Lisb. n. xxvi. 



