( S5) 



P. c. australis is a fairly well loarlvcd form, and may be distinguished from 

 P. c. castanotis, of Northern Pern, Eastern Ecuador, and Eastern Colombia 

 (Bogotd coll.) by having a more or less developed patch of chestnut in the middle 

 of the crown, and by the sides of the head being of a lighter chestnut. As a rule, 

 the throat is also chestnut, the chin alone being sooty blackish, though in this 

 respect some sjjecimens of the northern form match it exactly. 



148. Momotus momotus nattereri Scl. 



\^Ramj>hastns Momota Linnaeus, Si/sl. Xnt. xii. 1. p. I'i2 (I76G. — based on Edwards & Brisson 

 (excl. syn. Marcgrave) — Cayenne (ex Brisson) accepted as typical habitat).] 



Momotus nattereri Sclater, P.Z.S. Loud. 1857. p. 251 (" Yungas in Bolivia [d'Orb.] ; Goyaz, Brazil 

 [Natterer] " ). 



Momotus Nattereri Pelzeln, Zur Orn. Bras. i. 1867. p. 19 (Cidade de Goiaz, Guardamor, 

 Araguay). 



Nos. 2214, 2402. S6 ad., Rio Araguaya, June, August 1906.— Wing 135, 133 ; 

 tail 250, 230 ; bill 38, 39 mm. 



No. 2413. ? ad., Rio Araguaya, August 1006.— Wing 13U; tail 220; 

 bill 35 mm. 



No. 1651. juv., Faz. EsperanQa, December 1905. 



Cf. Nov. Zool. xiv. 1907. p. 28. 



149. Nonnula rubecula (Spix). 



Bucco rubecula Spix, Ar. Bras. i. p. 51. tab. xxxix. fig. 1 (1824. — " prope pagum Malhada, fluminis 



St. Francisci proximum "). 

 Monasa rubecula Pelzeln, Zur Ornith. Bras. i. 1867. p. 23 (Goiaz). 



No. 1993. S jr., Goyaz, April 1906.— Wing 64 (moulting); tail GUj ; 

 bill 21 mm. 



Agrees well with an immature bird from Victoria, S. Paulo. Eyelid black, 

 covered with white feathers ; frontal edge and lores i>ale huffish ; cheeks and ear- 

 coverts olive greyish-brown, with a distinct buffy patch in the anterior portion of the 

 latter ; chin creamy buff. 



In adult birds the sides of the head are sooty blackish, and the patch on the 

 ear-coverts, as well as the lores and the chin, white. Wing and tail are rather 

 longer. 



There is no difference between specimens from S. Paulo, Goyaz, and Bahia. 



150. Bucco chacuru Vieill. 



Bucco chacuru Vieillot, Nouv. Diet. iii. p. 239 (1816. — ex Azara, No. 2G1 : Paraguay). 



Nos. 1633, 1780, 1781. S d ad., Faz. Esperani;'a, December, January. — Wing 

 84—86 ; tail 73—77 ; bill 30—34 mm. 



No. 1791. ? ad., Faz. Esperan^a, January. — Wing 83; tail 70i ; bill 32i mm. 



No. 1790. ? imm., as above. — Wing 84 ; tail 70 ; bill 29 mm. 



No. 1657. ? juv., as above. — Wing b2 ; tail 72; bill 2S| mm. 



The adults agree perfectly with others from Paraguay and S. Paulo. The 

 young bird (No. 1657) differs by its buif (instead of pare white) nuchal band, 

 and by the throat and chest being much paler, creamy bufi" (not deep buff or 

 ochreous) with narrow blackish longitudinal streaks (instead of being marked 

 with wavy transverse lines). Besides this, the upper wing-coverts have broad 

 whitish apical bands. 



