622 CAPRIMTJLGID^. 



spot tinged with buff; quills tipped with whitish ; scapulars and 

 inner secondaries lighter ; feathers of the upper parts, including the 

 upper wing-coverts, whitish finely mottled with dark brown, and 

 with deep brown central spots, before the tip of each feather a large 

 rufous spot with a black eye at the tip, but with the outermost 

 margin white. 



Smaller specimens occur, with the wing only 6*7 to 7 inches in 

 length, but they are entirely similar in colour. If these be 

 distinct, then the name of L. semitorquatus should be restricted to 

 the smaller form, the larger birds being L. naftereri. 



There is, however, no sufficient reason to keep them distinct, as the 

 size is variable (I measured specimens with the wing 7'2, 7'5, and 

 7-8 inches in length) ; and the small form seems not to be restricted 

 to any specified locality, but occurs in Guiana and Cayenne as well 

 as in Brazil. 



Hah. British Guiana to Southern Brazil. 



2. Liirocalis rufiventris. 



Lurocalis nattereri, Tacz. {nee Temm.) R Z. S. 1879, p. 240 (Peru). 

 Lurocalis rufiventris, Tacs. Orn. Pcroic, i. p. 200 (1884) ; Berl. 8f 

 Tacz. P. Z. S. 1884, p. 306. 



Adult female. Similar to L. semitorquatus, but the spots of the 

 upper surface somewhat brighter rufous, the rufous spots on the 

 breast smaller and more numerous on a darker brown ground ; 

 abdomen and under wing-covcrts entirely uniform bright rufous ; 

 lower tail-coverts uniform rufous, the longest tail-coverts only with 

 a few bars. Total length 10 to 10-5 inches, wing 8-2 to S'o, tail 

 3-4, tarsus 0".5. 



The male is probably not different from the female. 



Young birds, so far as I can make out from the remains of 

 immaturity in one skin before me, are entirely different from young 

 specimens of L. semitorqatus. The abdomen seems to be paler, but 

 is also unbarred; longest under tail-coverts only barred. The 

 feathers of the upper surface are white with brown vermiculations 

 and large deep black spots before the tip, whereas the young of 

 L. semitorquatus have rufous spots with merely a black eye in each 

 near the tip. Primaries tipped with whitish. 



