SCLEKURUS. 91 



and nearly straight. The wing is rounded, the third, fourth, and 

 fifth primaries longest and equal, the second shorter than the 

 fifth but longer than the sixth, and the first about equal in 

 length to the eighth. The tail is stiffened, rounded at the tip, 

 and rather less than t^A•o-tl.irds the length of the wing. The tarsus 

 is proportionately short, being about equal in length to that of the 

 exposed culmen. Coloration : male and female similar. 



Key to the Sjyecles. 



A. Throat fawn-colour. 



a. Larger, wing more than S2 mm., culmen 



more than 20 mm (S*. caudamfus, p. 91. 



h. Smaller, wing less than S2 mm., culmen 



less than 20 mm *S'. riijif/ulans, p. 92. 



B. Throat bright ferruginous; culmen 2G mm., 



wing 80 S. m. macconnelli, p. 92. 



406. Sclerurus caudacutus. 



Black-tailed Leafscraper. 



Tliamnopliihfs ccnulacutus Yieill. N. Diet. d'Hist. Nat. iii. p. 310, 181G 



(Cayenne). 

 Sclerurus caudacutus Salvin, Ibis, 18S.5, p. -419 (Bartica Grove, Cama- 



cusa, Merume Mts., Atapurau Kiver) ; Sclater, Cat. B. Brit. l\Ius. 



XV. p. 116, 1890 (Merume Mts., Bartica Grove, Attapurow' River, 



Camacusa, Carimano; liiver) ; Brabourne & Chubb, B. S. Amer. i. 



p. 246, no. 2497, 1912. 

 Sclerurus caudacutus caudacutus Hellm. Nov. Zool. xiv. p. o6, 1907. 



Adult male. General colour above and below umber-brown, 

 paler and more rufe.scent on the lores, fore })art of the head, sides 

 of the face, and fore-neck ; chin and throat paler and inclining to 

 fawn-colour ; inner weljs of the flight-quills somewhat darker 

 tlian the outer ones; tail blackish; under wing-coverts ruf escent ; 

 quills below greyish brown ; lower aspect of tail similar to that 

 above. 



Total length IGl mm., exposed culmen 20, wing 1)1, tail (jS, 

 tarsus 23. 



Tlie bird described was collected on the Ituribisi River in 

 August 1909. 



Adult female. Similar to tlie adult male. Wing 89 mm. 



An immature bird from the Anarica River is similar to the 

 adult but everywhere less briglit in colour. 



lireedinff-seai^on. Uidcnown in British Guiana. 



^est. Unrecorded in British Guianu. 



