( 57 ) 



Adnlt. Very similar to S. c. caudacutus, but differs by the throat being pnre 

 white, each feather with a narrow, brown apical margin ; by having the chest 

 decidedly less rnfescent, dull tawny brown (much like the colour of the sides of 

 the head and neck) ; the breast and abdomen bistre brown (not rnfescent as in 

 S. c. caudacutus), and the back likewise much less tinged with reddish. 



Of this form I have before me the type of M. vmbretta, kindly lent by 

 Dr. Reichenow ; the typical specimen of S. lawrencei (an undoubted Bahia skin), 

 which Dr. Allen most obligingly sent for examination ; a Bahia skin in the British 

 Museum ; one ? ad. from Igarape-Assii, Parti ; and an immature <? from Borba, 

 belonging to the Vienna Museum. 



Although the original specimen of Lichtenstein is a young bird in fluffy 

 plumage, I have not the slightest doubt that it is specifically identical with 

 the type of S. lawrencei Ridgw. It differs from the latter by its somewhat darker 

 back, smaller size, and by having only the chin white, while on the throat this 

 colonr is almost entirely hidden by the brown apical portions of the feathers.* 

 This specimen corresponds exactly with Ridgway's description of the S of Tinactor 

 fuscus Wied, and I feel almost sure that the latter is also a young bird of 

 >>. c. umbretta. Ridgway's assumption that it was obtained "in the forests of the 

 river Itabapnana, between the parallels of 21° and 22° south latitude, apparently 

 a tributary of the Paraguay " (l.c. p. 29), is a very unhappy one, for Wied never 

 travelled in this part of Brazil. 



It is, moreover, quite evident from the account in Wied's Beise nach Brasilien i. 

 (ed. in 4°) p. 160, that the river Itabapnana referred to is the river of that name 

 forming the boundary between the provinces of Rio de Janeiro and Espiritu 

 Santo, in Eastern Brazil ; and it seems much more probable that the so-called ? 

 of Tinactor fuscus (— Sclerurus scansor Me'ne'tr.) was obtained in this locality, 

 inasmuch as Menetries met with the red-breasted form (scansor) in the province of 

 Rio de Janeiro ; while the S might have been secured on the River Belmoute, in 

 Southern Bahia, the second locality mentioned by Wied. 



The ? from Pani and the Bahia specimen in the British Museum agree in all 

 essential points with Ridgway's type, except that the foreneck is rather more 

 distinctly washed with tawny, and the belly of a more reddish hue. The young 

 3 from Borba is even more rnfescent on the lower parts, and thereby forms the 

 transition to S. c. caudacutus. 



In <S'. c. umbretta the upper parts are warm bistre-brown, passing into 

 burnt-umber (Ridgw., Nomencl. iii. fig. 8) on lower rump and upper tail-coverts. 

 Forehead, sides of the head, and neck are cinnamon (Ridgw. iii. fig. 20), the chest 

 of the same colour or a shade brighter. 



Measurements. 



Wing. Tail. Rill. 



1. Mns. Berlin. Av. juv., Bahia. Type of .1/. umbretta 



Lcht 



2. Amer. Mus. New York. No. 43,120. Adult, 



Bahia. Type of S. lawrencei Ridgw. 



3. Mns. Brit. Adult, Bahia 



4. Mus. Tring. ? ad., Igarape-Assu, Para. Robert coll. . 



5. Mus. Vindob. No. 20,232. S juv., Borba, 8. i. 830. 



Natterer coll 89 TO 22 



* The same difference between adult and young bird9 is to be found in S. e. (rW|MW.| 



