INDICATOEID^. 193 



following books and papers : — (1) Verreaux, in Lefebvre, Voyage Abyss. 

 Oiseaux, p. 177*; (2) Livingstone's 'Missionary Travels in South Africa,' 

 p. 547 ; (3) Heuglin, in the 'Journal fiir Ornithologie ' for 1862, p. 32 ; and 

 (4) in the ' Ornithologie Nordost-Afrika's ' (pp. 766-772) of the same author. 

 An interesting letter is also contributed by Mrs. Barber (Ibis, 1869, p. 373). 

 In the present paper I have attempted a revision of the family, and only 

 regret that there are still some species which have not fallen under my 

 notice. 



Family INDICATORID.^. 



Key to the Genera. 



a. Bill stout, rather deeper than broad ; culmen not nearly so long as the middle 



toe without its claw ; feet stout Indicator. 



/;. Bill slender, about equal in depth and breadth ; culmen about equal to middle 



toe without claw ; feet very slight Prodotiscus. 



Genus 1. Indicator. 



Type. 



Indicator, Vieill. Analyse, p. 28 (1816) /. mmor. 



Prodotes, Nitzsch, Pterylogr. p. 131 (1840) /. sparrmanni. 



Melignothes, Cassin, Pr. Philad. Acad. 1856, p. 146 1. conirostris. 



Melignostes, Heine, J. f. O. 1860, p. 192 (nom. emend, pro Melignothes). 



Range. — The whole of Africa below the desert ; Himalayan Mountains ; 

 Borneo. 



Key to the Species. 



a. Rump and upper tail-coverts uniform with the back. 

 a' . Size small ; throat uniform greyish. 



a". Wing 3'5-3'7 inches ; breast grey. 



a'". Bill stout ; no yellow shoulder-spot [conirostris. 



b'". Bill slender ; a distinct yellow shoulder-spot archipelagicus. 



b" . Wing 2'5 inches ; breast washed with olive exilis. 



2 D 2 



