ol? x1. 108 
one on each side of the head at the gape of the bill, while 
it has a very different coloration. Type ‘Casmarhynchus 
tricarunculatus (J. & H. Verreaux). 
The female of this species is easily distinguished from 
the female of Procnias variegatus in its much larger size 
and the conspicuously longer and narrower bill. 
Rhynchocyclus sulphurascens examinatus, subsp. nov. 
Adult. Similar to R. s. cherriei Hartert & Goodson, but 
differs in being darker on the upper surface, throat, and 
fore-neck. 
Total length 125 mm., expored culmen 14, wing 67, 
tail 54, tarsus 18. 
Habitat. British Guiana. 
The type is in the McConnell collection and was collected 
at Bartica, 1912. 
I have compared the series of this subspecific form, in 
the McConnell collection, with typical specimens of R. s. 
cherriet in the Tring Museum which have been loaned to me 
by Lord Rothschild. This form appears to be confined to 
the lowlands of North-west British Guiana. 
The birds collected at Mount Roraima and neighbourhood 
are intermediate between FR. s. cherriei and R. s. assimilis 
Pelz., but more nearly allied to the latter. 
Rhynchocyclus poliocephalus inquisitor, subsp. nov. 
Adult. Allied to R. p. sciateri Hellmayr, but differs in 
being darker on the entire upper parts, especially on the 
top of the head, and the very much brighter yellow on 
the under surface. 
Total length 105 mm., exposed culmen 10; wing 38, 
tail 42, tarsus 16. 
The type is in the McConnell collection, and was dalleeted 
at Bartica, 1911. 
Rhynchocyclus flaviventris gloriosus, subsp. nov. 
Adult male. Differs from &. flaviventris flaviventris in 
being paler and more yellowish green on the upper surface, 
