82 MOUSE-COLOURED SWIFT. 



ORDER VIIL— CHELIDONES. 



Family HIRUNDINID^. (Bonaparte.) 



Genus Cypselus. Illiger. 



Generic Characters. — Wings with the first quill equal to second or the 

 second longest; tail emarginate or forked; tarsus feathered in front at all 

 events; toes and claws nearly equal, short, robust; hallux directed inwards 

 and forwards — not opposable. 



MOUSE-COLOURED SWIFT. 



Cypselus pallidus. 



Cypselus pallidus, Shelly; Ibis, 1870, p. 445. 



" " Dresser; B. of Europe, 1875. 



" aptis, L. Webb and Berthelot; Orn. Cau., 



p. 23, 1 841. {^Nec Linn.) 

 " murinus, Brehm; 1855. 



" murarius, Vern. Harcourt; An. and Mag. Nat. 



Hist., fer 2, p. 437, 1855. (iV^c Temm.) 

 •' apiis, Heuglin; Syst. Uebers. Nord. Ost. 



Africus, p. 16, 1856. {Nee Linn.) 



Specific Characters, — C. Cypselo apoda affinis, sed minor; pallide grisescenti- 

 brunneus, gutture toto albo; pectore inferiore obsoleta albo marginato. Long, 

 tot. 6.5, ala 6.5, caudae 2.8, poll angl. — Shelly. 



This species of Swift has for a long time been confused with the 

 Common Swift, but it is, I believe, a good species, replacing the well- 

 known C. apus as a rule. 



We are indebted to Captain Shelly for the first determination of 

 this bird in the ''Ibis," for 1870, p. 445, and I therefore with pleasure 

 quote the following from the article in which this species is described. 



