118 MESSRS. MARSHALL ON THE CAPITONID&.  [Feb. 24, 
subfamilies, of which the following diagnoses will furnish distin- 
guishing characteristics :— 
oF With the upper mandible toothed or notched ...... Pogonorhynchine. 
. With margin of mandible smooth ; rictal bristles 
strongly eayeloped leer ia, secre. canth ta teeanst ote Megalemine. 
e. With margin smooth; rictal bristles rudimentary 
QU AW ADEN Ci. at hacrs tuys to sst en uite vane d slemanmundnldny Capitonine. 
The first subfamily is represented in Africa and America; the se- 
cond in Asia and Africa; the third is common to all three continents. 
The ornithology of Asia and America has received so much atten- 
tion, and the facilities for research are comparatively so great, that 
but little remains to be done in the way of classification ; and, with 
the exception of cancelling a few of Bonaparte’s genera, of which we 
are unable to give sufficient diagnoses, we have retained the existing - 
arrangement. 
In the American group we have re-united Eubucco of Bonaparte 
with Capito of Vieillot. 
In the Asiatic group, Cyanops and Chotorea of Bonaparte are 
merged in Megalema of Agassiz. 
The ornithology of Africa, on the other hand, is considerably less 
developed, the opportunities for study aud research being few and 
precarious; it contains types of all three subfamilies, and nearly 
half of the known species, including the most aberrant forms, are 
found there: among these is one species which we are unable to 
identify with any of the received generic types, and which presents 
sufficient structural peculiarities to found a new genus, for which 
we propose the following name and diagnosis :— 
STACTOLAMA. 
Type S. anchiete (fig. 1, p. 119). 
1. Rictal bristles rudimentary or wanting. 
2. Bill with the margin smooth. 
3. Culmen acute, inflated. 
The first and second features identify it with the subfamily of 
Capitoninee ; the third distinguishes it from Caloramphus and the 
remaining genera. 8. anchiete is the only species as yet known; 
it is one of the latest discoveries, and was described and figured in 
the ‘ Proceedings’ of this Society for 1869, p. 436, as Buccanodon 
anchiete, by Prof. J. V. Barboza du Bocage. The genus Bucca- 
nodon of Verreaux belongs to the subfamily Megaleemine, and has 
the rictal bristles fully developed ; it is similar in form and appear- 
ance to Xylobucco of Bonaparte, with which we have included it,— 
Xylobucco, the older name, being retained, while Buccanodon sinks 
into a synonym (see figs. 3 & 4, p. 119). 
The genus Trachyphonus of Ranzani, contains two very distinct 
types,—T’. margaritatus, on the one hand, having a comparatively 
sleuder, elongated, and much compressed bill, with a fully developed 
occipital crest (see fig. 5, p. 119); on the other hand, 7. purpuratus 
(fig. 6), having a short stout bill, with the culmen strongly arched, 
