4. TACHOKNIS. 



463 



Key to the Sjjcc'irx. 



. Uniform above ; tail deeply furcate. 

 a . Lateral rectrices very sharply pointed, 

 cousiderably more than 3 inches iu 



length parca and allies, p. 463. 



b'. Lateral rectrices less sharply pointed, 

 considerably less than 'A inches in 

 length. 



a". Glossy blackish above infumata, p. 467. 



b" . Ashy brown above hatassieiisis, p. 466. 



, Above black, with a white band across the 



rump ; tail .^liirhtly furcate jthcenicnbia, p. 468. 



1 . Tachornis parva. 



Cypselus parvus, i/c/if. 7 er;. 7>»/W. p. .58 (1823) (Nubia); Streitbel, 

 'isis, 1848, p. 351 ; Brehm, J. f. O. 1854, Extrah. p. 9.5; Eiipp. 



Sy$t. Uebers. p. 22, no. 69 (1845) ; Scl. P. Z. S. 1865, p. GOl 



(part.); id. J. f. O. 1867, p. 121 (part.); Heu(/I. Om. N.O.-Afr. 



p. 144 (1869); Fi/mh ^- JIartl. Vfig. O.-Afr. p. 131 fl870) ; 



Shelleti, Ibis, 1871, p. 48 ; id. B. Ecjiipt, p. 173 (1872); Shariie, 



ed. Layard's B. S. Afr. p. 94 (1875); Fischer, Zeitschr. yes. Orn. 



p. 358 (Massai-land)'(1884) ; Eeichen. J.f. O. 1887, p. 61. 

 Cvpselus ambrosiacus, Temm. PI. Col. 460. fig. 2 (1828)*; Streubel, 

 'isis, 1848, p. 351 (1848) ; Cab. 



£/■ Heine, Xlus. Hein. iii. p. 85 



(1860). 

 Cypsiurus ambrosiacus, Less. Echo 



'du Monde Sav. 1843, p. 134. 

 Mici'opus parvus, Boie, Isis, 1844, 



p. 165 ; F?m)i, J.f. 0. 1891 , p. 59 



(Tabora). 

 Dendrochelidon ambrosiaca, Bp. 



Consp. i. p. 66 (1850). 

 Cypselus mvochrous, Eeichen. J. 



f. O. 1886, p. 116 (Karema); 



Matschie, J. f. O. 1887, pp. 13o, 



141, 1.52. 

 Micropus myochrous, Eeichen. J.f. 



O. 1891, p. 152 (Tabora). 



Adult, ilouse-colour above and 

 below ; chin aud throat lighter, ^yith 

 dark shaft-lines ; Tvings and tail 

 darker, with a slight metallic gloss ; 

 tail deeply furcated. Total length 

 about 6-5 inches, wing 4-S-5*2, 

 lateral rectrices 4 (if quite full- 

 grown), central 1"4. / 



Young. In nestlings the throat is 

 uniform; all feathers, especially on T^x\ oi Tachornis pawa. 



* Hirundo ambrosiaca, Gm. Syst. Nat. i. p. 1021, founded upon Hirundo 

 riparia scneyalettsis. Briss. Orn. ii. p. .508, is not a Swift. (Cf. Scl. I. c. ; Fiiiech 

 & Hartl. f. r ). 



