6. CH^TURA. 483 



or hardly perceptibly paler than the abdoaiou, and by the upper 

 tail-coverts being very different in colour from the rectrices. 

 Uah. Brazil (llio). 



a, b. Ad. sk. Brazil, Sclater Coll. 



13. Chaetura spiuicauda. 



Hirondelle acutipenne de Cayenne, Buff. Hist. Nat. Ois. vi. p. 701 



(1779). 

 Hirondelle a queue pointue de Cayenne, Dauhent. Fl. Eiil. 72G, fig. 1 



(1783). 

 Cypsehis spinicaudus, Temm. Tahl. Meth. p. 78 (1839). 

 Acanthylis spiuicauda, Boie, Isis, 1826, p. 971, 1844, p. 167 ; Bp. 



Consp.i. p. 64 (1850). 

 Chajtura spinicauda, Scl. Cat. Am. B. p. 283 (1862) ; id. P. Z. S. 



1863, p. 101, 1865, p. 612; id. J. f. O. 1867, p. 135; Gray, 



Hand-l. i. p. 66 (1869) ; Scl. ^ Sah. Nomencl. Au. Neotrop. 



p. 95 (1873) ; Salv. Ibis, 1885, p. 437 (B. Guiana). 

 ? Chffitura spiuicauda. Bed. ^- Tacz. P. Z. S. 1883, p. 569 (W. 



Ecuador)*. 



Adult. Distinct from the allied species by a rather narrow light 

 grey or nearly white band across the rump ; all the rest of the upper 

 jjarts, including the upper tail-coverts, black with slight metallic 

 gloss; underparts greyish brown, darkest on the breast, whitish on 

 the chin and throat, lighter on the lower abdomen ; under tail- 

 coverts uniform brown. Total length about 4: inches, wing 4 to 

 4-2, tail 1-75. 



Ifab. Guiana to Cayenne and Trinidad. 



a. cJ ; b. Ad. sk. Bartica Grove, Brit. Guiana, Salvin-Godman CoU. 



Nov., Dec. [H. Whitely). 

 c,d. (J 5 ad. .sk. Camacusa, Brit. Guiaua, Oct. 8 Salvin-Godman Coll. 



{II. TMiitehj). 

 e. Ad. sk. British Guiana (Brown). Sclater Coll. 



/. c? fd. sk. Surinam, April 1 (C. B.). Salvin-Godman Cull. 



ff, h. Ad. sk. Cayenne (Fraser, Parziulaki). Sclater Coll. 



i. Ad. sk. Surinam. 



14, ChaetTira fumosa. 



Chfetura fumosa, Salv. P. Z. S. 1870, p. 204 (Veragua) ; Wyatf, 

 Ibis, 1871, p. 375 (Colombia) ; Scl. Sf Salv. Kommcl. Av. Neotr. 

 p. 95 (1873). 



Chsetura spinicauda, Layard, Ibis, 1873, p. 389 (Para). 



Very closely allied to C, spinicauda, but differs in the rump not 

 only being crossed by a grey band, but the entire rump and upper 

 tail-coverts, except the longest, being grey with dark shafts. Besides 



* This will probably prove to be a new species. The authors noticed differ- 

 ences in colour between specimens from Guiana and others from Ecuador. 



2i2 



