46 On South-American Felide. 
points to be noticed about it are:—(1) the postorbital pro- 
cesses of the frontal are short and spiniform; (2) the maxilla 
is antero-posteriorly expanded above and the plane of the 
anterior nares is nearly upright; (3) there is a distinct 
although small thickening on the malar by the preorbital 
foramen ; (4) the lower carnassial has a long heel. This 
combination of cranial characters, coupled with the backward 
direction of the hairs on the neck, indicates, in my opinion, 
affiliation between this species and forms related to /. pardi- 
noides and dissociates it from the group represented by 
Lf. wiedit (macroura). The interest of this view lies in the 
circumstance that F’. wiedi?, until the publication of Thomas’s 
paper, was always regarded as specifically identical with 
fF. tigrina, the latter name standing for the species. Since [ 
can discover no valid reason for dissenting from Thomas’s 
determination of this cat as F. tigrina, Schreb., but, on the 
contrary, much that is in its favour *, it will be expedient, I 
think, to adopt his proposal, and regard the specimen in the 
Museum as embodying the characters of F. tigrina, thus re- 
leasing wedi from the synonymy of that species. 
Thus groups IL., II., 1V., and V. of Thomas’s arrange- 
ment may be fused into one, and the resulting assemblage 
may be amplified by the inclusion of /. jaguarondi, with its 
colour-mutation eyra, an unspotted species with which Thomas 
did not deal. 
I have recently shown (Ann. & Mag. Nat. Hist. (8) xix. 
pp. 129-132, 1917) that F. wiedi differs trom J. geoffroyt, sali- 
narum, and jaguarondi in the structure of the feet, and that 
fF, pardalis resembles F. wedi in that particular. In F’. par- 
dalis also the hair of the nape is always reversed in direction, 
as is usually, at all events, the case in /. wiedii. As living 
animals these two species are often very difficult to distin- 
guish except by size and the length of the tail. In my 
opinion they are too closely related to be placed in different 
groups, despite the differences in the skulls, 
Finally, there are the two species, or subspecies, known as 
F’. colocolo t+ and F. pajeros, which, as I have recently sliown 
(Ann. & Mag. Nat. Hist. (8) xviii. p. 329, 1916), differ in the 
* It is true that Buffon’s figure of the margay, reproduced by Schreber, 
suggests a cat with rather a bolder pattern, a longer tail, and spots on 
the middle of the forehead; but it would, I think, be hypercritical to 
expect complete accuracy in an antique illustration. 
+t The cranial differences between these two forms described by 
Philippi do not exist. That author’s example of F. colocolo appears to 
me to have been a menagerie-reared specimen, judging from the peculiar 
shape of the skull. 
