An. das Mem. do Instituto de Butantan — Vol. I - fasc. 1 (Ofiologia) 61 
This snake is also distinguished from El. simonsii BLGR. (13) 
grincipally by its rostral which is deeper than broader, its frontal 
which is a little longer than broad and over twice as long as 
the supraocular, by having a lower number of ventrals, and by 
a diverse distribution of the spots on the head and the rings 
on the body. 
By comparing the present species with those of section III, B, 
2 Of BOULENGER: 
HI — Seven upper labials, 3rd. and 4th. im contact with 
the eye; 
B. — 7 th. upper labial well developed, rostral moderate, just 
visible from above; internasals much shorter than the prae-frontals; 
2 — Ist. lower labial in contact with its fellow; posterior 
nasal in contact with the pree-ocular; 
and by comparing the colouring on the body and head and 
the number of xventrals, one finds that it is very similar to 
El. marcgravii WIED and. EI, decoratus JAN. 
The principal points of distinction from El. marcgravii are: 
the frontal which is more than twice as broad as the supraocular; 
and only a little longer than broad; the anterior temporal which 
is smaller than the posterior. It is different from the El. decoratus 
in that it has an anterior temporal, the 6th. upper labial, therefore, 
not being in contact with the parietal, and also as its parietals 
are longer than their distaúce from the internasals. In reference 
to the number of subcaudals of the El. decoratus which. BOULENGER (14) 
settles between 29 and 37, I found a smaller number, namely 
between 17 and 30 in 14 specimens which I was able to 
examine, 10 of which are at present im the Butantan Institute 
snake collection under n.ºs 68, 69, 442, 841, 932, 1.233, 1.455, 
1.456, 1.709 and 1.816 and 4 in the «Museu Paulista » collection 
under m.ºs 66, 67, 68 and 522, so that this data cannot be used 
in the differentiation of the 2 species in question. 
The species cannot also be identified with El. lemniscatus L. 
and El. frontalis Dm. & B., principally as it has a smaller number: 
of ventrals and as its rostral is deeper than broader and the 
frontal over twice as broad as the supraocular. Nor cam it be 
identified with El. spixii WaGL., because of the head colouring, 
and number and location of black rings which are very diverse, 
its frontal being also only a little broader than the supraocular. 
Finally, KI. fischers differs from El. decoratus and El. maregravia 
as well as from the other species of cited Section III, B, 2 of 
BOULENGER, by the essencial characteristic of Section HI, B, 3, 
m which it should be included, that is, by the already mentioned 
contiguity of the symphysial to the anterior chin-shields. 
(13) G. A. BouLENGER — “List of the Fisches, Batrachians and Reptiles collected by the late 
Mr. P. O. Simons in the Provinces of Mendoza and Cordoba, Argentina” — in The Annals and Magazine 
of Natural History — vol. IX, 1902, pp. 338-339. 
(4) G. A. BouLENGER — op. cit., p. 419. 
