( 398 ) 



" Iris white, feet jjreeii, bill black, buiT and yellow." 



The series forms the passage to the northern P. c. castanotis, the crown being 

 black without any chestnut tinge, but the sides of the head and throat are coloured 

 as in (iKstralis from Paraguay and Mattogrosso. Occasionally blaik-headed 

 examples are also met with in the latter countries. 



P. c. ati.<<tral/s inhabits the Brazilian central provinces Goyaz and Matto- 

 grosso (north to the Rio Machados), Eastern Bolivia and Paragnav." Cf. Xoc. ZuoL 

 XV. 1908. pp. 84-5. 



340. Pteroglossus bitorquatus sturmii Natt. 



[Pteroijlussiis bilarrjiialus Vigors, Zmihi;/. Joimi. ii. p. 481 (1826.— no locaUty).] 

 Pteroglossus fitiirmii Natterer in Sturm, Muiiur/r. Rhamphast. Hef t .^ [p. I.^. tab. 7J (18-!2.— Boiba, 

 Rio Madeira) ; Pelzeln, Zur Oni. liras. iii. 1869. p. 237 (Borba). 



Nos. 488, 447. S ad., S fere ad., Calama, 24, ;50. viii. I'.IOT. "Iris brown, 

 feet green, upper mandible and tip of lower one yellowish green, remainder of the 

 latter black."— Wing 128, 124 ; tail 143, l.jO ; bill lOU mm. 



No. 410. i juv., Calama, 17. viii. 1907. Soft parts as above.— Wing 1 18 ; 

 tail 123 ; bill 94 mm. 



No. 589. S ad., Jamarysinho, Ilio Machados, 25. ix. 19u7. Soft parts as 

 above. — Wing 124 ; tail 134 ; bill 07 mm. 



No. 576. ? iram., Jamarysinho, 20. ix. 1907. "Iris reddish brown, feet dark 

 green, bill coloured as above."— Wing 122; tail 125; bill 79 mm. 



No. 930. (J ad., Maruins, Rio Machados, 21. vi. 1908. " Iris dark brown, feet 

 light green, bill yellowish green, lower mandible black."— Wing 123 ; tail 143; 

 bill 94 mm. 



Nos. 90.5, 938. ? ad., ? vix ad., Maruins, 4, 21. vi. 1908. "Iris brownish red, 

 feet and bill as above."— Wing 123, 116 ; tail 140, 131 ; bill S3 mm. 



No. 906. ? juv., Maruins, 4. vi. 1908. "Iris reddish brown, feet pale plum- 

 beous, upper mandible dull yellowish, lower one black." — Wing 119; tail 133; 

 bill 79 mm. 



This rare species was hitherto rejiresented by a single male specimen in the 

 Vienna Museum, obtained by Natterer, in 1830, near Borba on the right bank of 

 the Rio Madeira. 



P. b. sturmii is most nearly allied to F. h. Litorqinitiis from the Para district, 

 and, like it, has a broad yellow jugular band, but dift'ers by its black lower 

 mandible, the extreme tip only being yellowish. Another difference between the 

 two forms apjjears to exist in the colour of the eye. Both Natterer and Hoffmanns 

 state the iris to be brown or reddish brown in J', b. stxnnii, orange or reddish 

 yellow in P. b. bitorquatua. 



The adult S6 (Nos. 447, 4.ss, 589, 939) have the top of the head glossy 

 black and a large spot on the chin dull black. The upper back is strongly suffused 

 with crimson, and there is a patch of the same colour on the urojjygium. 



The young male (No. 410) has the red on the mantle and breast duller and 

 less extended, and the upper mandible duller, more greyish yellow. The upper 

 wing-coverts as well as the feathers of the lower back show narrow ]jale reddish 

 ai)ical margins. 



The females differ from the males by having the top of the head dull brownish 

 black, the sides f)f the head and the throat darker chestnut, and by laekin" the 

 blackish chin-s[iot. Besides, all dimensions are less, especially the bill is much 



