Mr. P. L. Sclater on the American Barbets. 185 
The most noticeable points about the Tetragonops are the 
singular conformation of the bill (the lower mandible being 
distinctly bifurcated at its extremity, and the point of the upper 
fitting into the groove thus made), and the abnormal distri¬ 
bution of the colours, w'hich strongly reminds one of some of 
the Toucans of the genus Andigena . 
Genus II. Capito. 
Capita , Vieill. Analyse, p. 27 (1816). 
Micropogon, Temm. Tabl. Meth. d. PL Col. p. 55 (1838). 
Nyctactes , Gloger, Obs. s. noms d’Ois. (1827). 
Rostro compresso, ad basin dilatato, culmine inter nares ele¬ 
vate : mandibula subrecta, apice acuto; maxilla incurva, apice 
ultra mandibulam breviter protenso. 
Sectio a. Capito. 
Majores: robustiores. 
1. Capito erythrocephalus. 
Barbu de Cayenne , Buff. PL Enl. 206. fig. 1, unde Bucco ery - 
throcephalus , Bodd., et B. cayennensis, Gm. S. N. i. p. 405 : 
Micropogon cayennensis , Temm.: Capito erythrocephalus , Gray, 
Gen. ii. p. 430 (adult.). 
Barbu de S. Domingue , Buff. PL Enl. 206. fig. 2, unde Bucco 
cayennensis , var., Gm. S. N. i. p.405: Micropogon ncevius, Temm.: 
Capito ncevius, Gray, Gen. ii. p. 430 (juv.). 
Capito cayennensis, Schomb. Guian. iii. p. 720: Le Barbu de 
la Guyane , Le Vail. Ois. de Par. ii. pis. 23, 24, 25. 
Niger, sulphureo variegatus : alis et cauda fuscis, extus virescen- 
tibus : pileo flavicante, fronte lato et gutture rubro-coccineis : 
abdomine pallide sulphureo : lateribus nigro obsolete macu- 
latis : pectore et lateribus totis in juvene nigro distincte gut- 
tatis: long, tota 6*5, alee 3*1, caudse 2‘0. 
Hah. Guiana. 
Mus. Brit., P.L.S. 
There is no doubt now, we believe, that the Capito ncevius is 
merely the young of Capito erythrocephalus, and that the spots 
gradually disappear, in the manner pointed out by MM. Deville 
and Des Murs in their article upon the following species, leaving 
the abdomen pure and unspotted in the adult bird. 
VOL. III. 
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