156 Mr. P. L. Sclater on the 



Genus 5. Cassiculus. 



Cassiculus, Sw. Zool. Journ. ii. p. 352 (1827) : type C. me- 

 lanicterus. 



The single form upon which Swainson based the genus 

 Cassiculus possesses certain peculiarities (such as an elon- 

 gated bill and well developed crest) that may justify us in 

 allowing it to remain under a separate generic heading, 

 though it is certainly not very widely differentiated from 

 the true Cassici. 



1. Cassiculus melanicterus. 



Icterus melanicterus, Bp, Journ. Acad, Philad. iv. p. 389 

 (3824). 

 Icterus diadematus, Temm. PI, Col. 482 (1829). 

 Cassiculus coronatus, Sw, Zool. Journ. ii. p. 352^ et Phil. 

 Mag. 1827, i. p. 436. 



Xanthornus coronatus, Jard. et Selb. 111. Orn. pi. 45. 

 Cassiculus melanicterus, Bp. Consp.p.428; Cab. Mus. Hein. 

 p. 186; Sclater, P. Z. S. 1859, p. 380; Baird, Ibis, 1863, 

 p. 476 ; Scl. Cat. A. B. p. 129; Scl. et Salv. Nomencl. p. 35. 

 Cassicus melanicterus, Cassin, Pr. Acad. Phil. 1867, p. &Q. 

 Niger, dorso postico, alarum tectricibus minoribus, et crisso 

 flavis ; cauda flava, rectricibus duabus mediis totis et 

 ceterarum marginibus externis (prsecipue in exterioribus) 

 nigris ; rostro flavicanti- albo ad basin plumbescente ; pe- 

 dibus fusco-nigris : long, tota 10'5, alse 5-8, caudse 4-8. 

 Femina, cinerascenti-nigra, flavo sicut in mari decorata : 

 long, tota 9*4, alaj 5*0, caudse 4-2, 

 Hab. South Mexico, Oaxaca {Boucard) ; Mazatlau {Gray- 

 son et Xantus). 



Genus 6. Cassicus. 



Cacicus, Cuv. Le9ons d^An, Comp. table 2 (1800) : no type. 

 Cassicus, 111. Prodr, p. 214 (1811) : type C. hcemorrhous. 



Brisson originally spelt this term " Cassicus''* (no doubt 

 from cassis, a helmet) ; but Cuvier, and Daudia after him, 



* Orn. ii. pp. 98, 100, hut not used as a generic term, the two birds 

 called " Cassicus " being embraced in his genus " Icterus.'^ 



