4. MOMOTUS. 319 



rufous concealed by the blue nape ; 



under surface of body rufescent .... siibrufescens, p. 321. 

 d". No rufous on the hind neck, which 

 resembles the mantle and sides of 

 the neck in colour. 

 «'". Under surface green or olive with a 

 slight tawny shade. 

 «■*. Size smaller : without a broad bar 

 of black round the blue nape- 

 cinctiire,some few feathers black- 

 centred or black-tipped. 

 fl'. Coronal spot of black large .... nattereri, p. 322. 

 b^. Coronal spot of black small. . . . microstephanus, p. 322. 

 6*. Size rather larger; a broad band 

 of black round the blue nuchal 

 cincture, 

 c'. Larger : light streak below the 

 black cheeks obsolete or 

 represented by a few green 

 feathers only ; purplish shade 



on nuchal cincture obsolete . . aquatorialis, p. 323. 

 d'. Smaller: light streak below the 

 black cheeks always well pro- 

 nounced and bright blue ; 

 nuchal cincture with a pur- 

 plish shade posteriorly lessoni, p. 324. 



b'". Under surface chestnut, the throat 

 like the rest of the abdomen and 



breast sivainsoni, p. 326. 



b'. Entire crown blue, with no black centre. . caruleiceps, p. 327. 

 h. Head chestnut, 

 c'. Black of sides of face bordered above and 



below with blue mexicanus, p. 328. 



\ d'. No blue on the sides of the face castaneiceps, p. 329. 



1. Momotus mom Ota. 



Rhamphaatus momota, Linn. S. N. i. p. 152 (1766) : Gm. Sust 



Nat. i. p. 357 (1788). ^ 



Motmot du Bre'sil, Daubent. PI. Enl. vi. pi. 370. 

 Brazilian Motmot, Lath. Gen. Syn. i. p. 338, pi. x. (1781). 

 Momotus brasiliensis, Lath. Lnd. Orn. i. p. 140 (1790); Gray, Gen 



B. i. p. 68 (1847) ; id. Cat. Fissir. Brit. Mus. p. 39 (1848) ; sd. 



P. Z. S. 1857, p. 250 (Cayenne, etc.) ; id. Cat. Amer. B. p. 263 



(1862); Schl. Mm. Pays-Bas, Momotus, p. 2 (1863) : Peh. Orn. 



Bras. p. 19 (1868) ; Scl. ^- Salv. Nommcl. Av. Neotr. p. 102 (1873) • 



Gray, Hand-l. B. i. p. 79, no. 930 (1869) ; Murie.Ibis, 1872, p. 387 ; 



Salvin, Ibk, 1886, p. 60 (Brit. Guiana). 

 ?Le Motmot ou Houtou, LevaUl. Hist. Nat. Ois. Parad Rolliers i 



p. 108, pis. 37, 38 (1806). ' 



Prionites momota, lUiyer, Prodr. p. 224 (1811); Cab. in Schomb. 



Reis. Guian. iii. p. 704 (1848); Bp. Consp. i. p. 165 (1850) ; Cab. 



S,- Heine, Mus. Hein. Th. ii. p. 114 (1860). 

 Baryphonus cyanocephalus, Vieill. N, Diet. d'Hist. Nat xxi n 315 



(1818). " ■ ■ ^ 



Momotus momota, Jard. ^ Selby, III. Orn. ii. Syn. no. 1 ; Stein 



Stand. Nat. Hist. Birds, p. 398 (1885). 

 Prionites brasiliensis, .^(TOMis, Cla.mf. B. ii. p. 388 (1837)- Bitrm 



Th. Bras. ii. p. 412 (1856). 



