824 DR. G. HARTLAUB ON THE BIRDS OF ZANZIBAR. [NoV. 14, 



mottled appearance of the throat ; and the external tail-feathers are 

 shorter and much less attennated at the tip. The dimensions of the 

 adult bird are :— Long, tota 6" 3'", al« 4" 9'", rectr. ext. 3" 8'". 



4. CORACIAS CAUDATA, L. 



Zanzibar seems to be the northern frontier of this fine species, on 

 the east coast of Africa ; whereas, on the opposite side, it does not 

 proceed further up than Angola. Speke collected it in Uzaramo, 

 " near the junction of the Kurgen and M3'eta Rivers." J. Verreaux 

 mentions a specimen from Kurrichaine. The range of this bird does 

 not extend much further south than the latitude of Natal. 



5. Halcyon striolata, Licht. 



The well-known widely distributed species. For the somewhat 

 smaller northern form {H. chelicuti) I cannot admit specific sepa- 

 ration. 



6. Irrisor erythrorhynchtts, Lath. 



There still remains much uncertainty about these birds. Whether 

 the western and the southern birds are really distinct, as Sir W. 

 Jardine pretends, is still an undecided question to me. I also believe 

 that the colour of the beak is incident to age or season. But the 

 form of that organ is also very variable and individually different. 

 As to the white on the wing, it is curious that the Zanzibar bird has 

 the larger white spots of the western race and the yellowish-green 

 reflexions of the southern individuals. In the end Irrisor erythro- 

 rhynchus and I. senegalensis may turn out to be one and the same 

 species (conf. Jard. Contrib. 1852, p. 344 ; Hartl. West Afr. p. 42). 



7. Nectarinia JARDiNii, Verr. ; Hartl. West Afr. p. 47. 



One adult specimen. 



Zanzibar is a new and interesting locality for this species, all the 

 known specimens of which came from the west coast, where it occurs 

 from Gaboon to Benguela (cf. Barb, du Boc. Possess. Portug. p. 73). 

 There is no difference whatever between the Zanzibar bird and a 

 S[)ecimen from Angola in the Bremen collection. 



8. Nectarinia collar is, Vieill. ; Jard. Monogr. Nect. pi. 6 ; 

 Hartl. West Afr. p. 62. 



^lany years ago this species was collected by Boyer on the island 

 of Zanzibar (Mus. Vindob.). On the west coast it extends from Se- 

 negambia to the Equator. There is no difference between eastern and 

 western individuals. 



9. Nectarinia gutturalis (L.). 



Certhia brasiliensis nigricans, Briss. iii. 658 ; Shaw, Natur. Misc. 



p. 797. 



Coereba gutturalis, Gr. & Bp. Consp. p. 400. 



Nectarinia natalensis, Jard. Monogr. pi. 12; Contr. Orn. 1850, 

 p. 62, c.fig. mcd. 



