322 Dr. G. Hartlaub on a new Bird from TV. Africa. 
the red bill and feet also, though in rather a less degree, remind 
one strongly of Eurystomus. 
Genus Pseudqchelidon. 
Rostrum eurystominum, sed apicem versus conspicue attenuato- 
subcompressum, culmine minus rotundato, inter nares 
apertas subcarinato; naribus in fossa subtriangulari positis, 
subrotundatis, conspicuis. 
Pedes majusculi; tarsi breves, digito interno et externo sequa- 
libus; unguibus debilibus valde compressis, postico robus- 
tiore, majore. 
Alse cypselinse, longse, angustse, subfalcatse, caudse apicem longe 
superantes. 
Cauda brevis, sequalis, rectricibus apioe subquadrato-dilatatis, 
in apicem tenuem desinentibus, sive submucronatis ; scapis 
mollibus; supra- et infra-caudalibus longis, cypselinis. 
Ptilosis sericea, metallice nitida. 
Pseudochelidon eurystomina, nod. 
Tota nigra, nitore nonnullo metallico ; dorso conspicue seneo-vi- 
rescente, cauda et alis vix virescentibus; subalaribus fuli- 
ginosis; pedibus flavo-rubentibus; rostro corallino-rubro, 
apice pallidiore, flavo; unguibus pallidis. 
Long, tota 5" 3 r "; alse 4" 4 m ; caudse 1" 7" 1 ; rostri a fronte 5'", 
a rictu 7 m ; latit. rostri ad bas. 5'"; altit. rostri ad bas. 2^ ,// ; 
long, tarsi dig. med. c. ung. 8 ,n : long. dig. ext. et int. 
c. ung. 6" 1 , poll, et lin. Gall. 
The deep, half velvet-like, half dull metallic-like, glimmering 
green of the back seems rather sharply defined against the pure 
black of the head, and reminds one of the somewhat peculiar 
colouring of Hirundo thalassina. The under side is more of a 
dull black. The formation of the tail is abnormal, and worthy 
of remark. The soft shafts of the rectrices project, though not 
naked, beyond the barbed portions ; these latter being rather 
pointed towards them. This formation is carried to the furthest 
extent in the two middle feathers, but is apparent in all of them. 
The upper and under tail-coverts project in a wedge-like shape 
to nearly the end of the tail—a formation almost constant 
among the Hirundinid(B } but which, on the other hand, is not 
found in Eurystomus , where the tail-coverts only just cover the 
base of the tail. The formation of the feet differs from that of 
Eurystomus , inasmuch as it is generally weaker, and the inner 
