INTRODUCTION. 
17 
13. Eupsyehortyx parvicristatus 
14. - leucopogon 
PI. XII. 
PI. XIII. 
For the fourth section I propose the generic term 
PHILORTYX, 
WITH THE FOLLOWING CHARACTERS:— 
Habitus idem ut in genere “ Ortyx ” dicto. Indumentum phmatile, molle et laxum, dorsi superioris plumis, nec 
non scapularum, pectoris et laterum latis et truncatis; illis et pectoris et laterum transversim distincte nigro 
alboque fasciatis, at non guttatis. 
General form that of Ortyx ; plumage soft and yielding ; feathers of the mantle, scapularies, chest and flanks broad 
and truncate ; those of the two latter distinctly barred across with black and white, and not spotted. 
The only known species is 
15. Philortyx fasciatus ........ PI. XIV. 
Ortyx Perrotiana, O. Des Murs, Rev. Zool. 1845, p. 207. 
I have had no opportunity of examining the bird described by M. O. Des Murs, under the above appel¬ 
lation ; but, judging from the description, I believe it to be identical with this species. 
The Philortyx fasciatus is confined to Mexico, and I believe the sexes are similar in their markings. 
For the fifth section I retain Wagler’s name of 
CALLIPEPLA, 
WITH THE FOLLOWING CHARACTERS:— 
Caput crista longa et pendente ornatum; rostrum breve, et aliquantb attenuatum, culmine gradatim a basi de- 
scendente, tomiis acutis, paulb incurvatis; mandibula infei’iore recta, et apicem versus denticulis duobus vel 
pluribus instructs; naribus basalibus aliquantb grandibus, et operculo obtectis; orbitis plumis indutis; alee 
paulb elongatm et concavm, primariis valde rigidis, remigibus quarta, quintd et sexta cseteris longioribus; 
cauda aliquantb elongata et e plumis duodecim rigidis constans ; tarsi, sic et digiti , paulo graciles ; his ad basin 
membrana conjunctis, digito interno breviore. 
Head ornamented with a long pendent crest; bill short and somewhat slender ; culmen gradually descending from 
the base; tomia sharp, slightly incurved ; under mandible straight, and armed near the tip with two or more 
