36o 
ON THE CLASSIFICATION OP BIRDS. 
families I correspond with those of the Scansores, they do 
not reciprocally represent the same analogies to other 
groups. This will be evident upon studying the fol- 
lowing table : — 
Tribes of Families of 
Insessores. Analogies. Fissirostres. 
Destirostbes. [®®i,ooke“ ’ biHshort, j caprimulgida. 
CoNiROSTRES. Typical in their respective circles. Rimndinida. 
ScANsoRRs. Passingby means of Pric/wfYcs into the Trogonida. 
Tenuirostres. Bill very long, slender, and entire. Halcyonidee. 
F.ss.BOsTUEa. 
In the two first analogies there is no alteration ; since 
the Caprimulgidre as correctly represent the Dentirostres, 
as they do tlie Psittaoidce : and the Hirundinidce main- 
tain the typical station corresponding to the Conirostres 
and the Picidcs. Here, however, the mutual corre- 
spondence of the groups cease ; for the Trogonidce, which 
correspond to the Ramphastidce, do not stand opposite 
to the Fissirostres, but to the Scansores, being that 
tribe into which they blend. True it is that this ana- 
logy would seem to be obscure, and even questionable, 
were it not for the genera Prionites and Nyctiomis ; 
yet setting aside these forms, every one must perceive 
that the trogons, of all the fissirostral birds, are those 
only which exhibit any similarity in their structure to 
the gallinaceous order. Both have short and remark- 
ably convex wings, the quills of which are very stiff 
and curved inwards, while the Calurus pavonimis, Sw., 
or peacock trogon, makes this analogy comprehensible 
to the most ordinary observer. We may, therefore, 
establish the analogy of the trogons to the Scansores 
by their similarity to the Rasorest, and this without 
insisting on their actually passing into the Ramphastidre. 
We next proceed to the Halcyonidee, which represent 
the Tenuirostres and the Grallatores ; so also does 
Cuculus, and therefore nothing more need be said on 
these analogies : but the case is very different regarding 
the next. The Meropidee, as we have before seen. 
