124 
Dr. Heuglin on new or little-known Birds 
related, but much larger, is SundevaFs Megalcema leucotis } from 
Lower Caffraria (Ofvers. 1850, p. 109). 
8. P. diadematus, Heuglin. Pogonias diadematus, Heugl. 
Syst. Uebers. p. 47. no. 479. 
Only found in the wide Steppes of the Kitsch-Negroes, be¬ 
tween 7° and 8° N.L. on the western bank of the Bahr el Abiad. 
It is common on high trees, especially on the colossal Syca¬ 
mores. This species resembles the nearly-related, but larger, 
and also more or less highly-coloured P. unidentatus (Licht.) 
from Kafferland, and P. duchallui, Cass. ( Barbatula formosa, 
Verr.), from W. Africa. 
Genus Barbatula, Lesson. 
1. B. pusilla, Bp. Bucco barbatula , Temm. 
In a collection of birds made on the Blue Nile, which I pre¬ 
sented to the Royal Natural History Cabinet at Stuttgard, I 
first found an apparent male of this species. It substantially 
agrees with the diagnosis given by Hartlaub (Syst. Orn. W. 
Afrik. p. 173), though slightly differing in dimensions, which in 
my examples are as follows:—Long, tota circ. 4*0, rostri a 
fronte 0*48, tarsi 0*6, ake 2*0, caudse 1*3 poll, et lin. Gall. 
2. B. chrysocoma (Temm.). Bucco chrysocomus , Temm. 
PI. Col. 536. fig. 2. 
I found specimens of this humble little bird concealed in 
thick foliage along the streams of Central and West Abyssinia, 
as well as on the Bahr el Abiad, and also more rarely on the 
main stream of the Nile between Khartoum and Berber. It may 
be abundant, but from its habits is very difficult to find. 
Genus Trachyphonus, Ranzani. 
1. T. margaritatus (Rupp.). Bucco margaritatus, Riipp. 
Atlas, t. 20. 
Common in the Bajuda-Steppes along the banks of the Nile, 
south of Berber (17° N.L.), in Kordofan, Sennaar, Abyssinia, 
Taka, and in the Abyssinian Avail and Somali coast-lands. Ap¬ 
parently confined to E. Africa, but very widely diffused. The male 
is somewhat larger than the female. Iris violet. 
