NATURAL SCIENCES OF PHILADELPHIA. 33 



16. Cypselus ambrohiacus, (Gmelin.) 



Hirundo ambrosiaca, Gm. Syst. Nat. ii. p. 1051. 

 Cypselus parvus, Liclit. Verz. p. 58. 

 Temm. PI. col. 460, fig. 2. 



All the specimens that I have ever seen from Western Africa are darker co- 

 lored than others from Eastern Africa and Madagascar in the Acad. Mus. In 

 other respects they are very similar, and I cannot distinguish them specifi- 

 cally. From the Camma and Ogobai rivers. 



17. Chaetura Sabinei, (Gray.) 



Acanthylis Sabinei, Gray in Griff. Cuv. ii. p. 70. 

 Chaetura bicolor, Gray, Zool. Misc. p. 6. 

 Pallene leucopygia, Boie, Isis, 1844, p. 168. 

 From the Camma. 



18. Atticora melbina, Verreaux. 



Atticora melbina, J. & E. Verreaux, Mag. et Rev. Zool. 1851, p. 310. 

 From the Camma and formerly received from Cape Lopez. 



19. Atticora nitens, Cassin. 



Atticora nitens, Cassin, Proc. Acad. Philada. 1857, p. 38. 

 Several specimens show no other characters than as above described. From 

 the Ogobai. 



20. Hirundo cahirica, Lichtenstein. 



Hirundo cahirica, Liclit. Verz. p. 58. 

 Hirundo Boissoneauii, Temm. 

 A single specimen from the Camma river. Very light colored on the un- 

 der parts of the body but apparently this species. 



21. Hirundo nigrita, G. R. Gray. 



Hirundo nigrita, Gray, Genera of Birds i. p. 58, (1845.) 



Gray, Gen. i. pi. 20. 



This fine species seems to indicate a distinct subgeneric group, having the 

 bill and general form of typical Hirundo with a shorter tail. Its color too, 

 pure black with the throat white, are quite characteristic. It does not appear 

 to be a common species, a few specimens only having been received from the 

 Camma. 



In this species the white spot on the throat is much larger in the adult than 

 is represented in Mr. Gray's plate above cited, inner webs of tail feathers 

 white, except at the ends, all other parts lustrous metallic purplish black. 



22. Cecropis Gordoni, (Jardine.) 



Hirundo Gordoni, Jard. Contr. Orn. 1851 p. 141. 

 This is a quite distinct and well characterized species of the same group . s 

 the large C. senegalensis. Received for the first time in the collection from the 

 Ogobai river. 



23. Eurystomus afer, (Latham.) 



Coracias afra, Lath. 



Eurystomus purpurascens et rubescens, Vieill. 



Colaris viridis, Wagler, Syst. Av. 

 Le Vaill. Ois. Par., pi. 35. 

 From the Ogobai. Rather smaller than specimens from Sierra Leone. 



24. Eurystomus gularis, Vieillot. 



Eurystomus gularis, Vieill. Nouv. Diet. 

 Le Vaill. Ois. Par., pi. 36. 

 From the Ogobai. 



25. Halcyon senegalensis, (Linnseus.) 



Alcedo senegalensis, Linn. Syst. Nat. i. p. 180 (1766.) 

 Buff. PI. Enl. 594. Swains. Zool. 111., pi. 27. 

 From the Camma. 

 1859.] 3 



