Dr. H. Burmeister on Ziphiorrhynchus. 303 
apice nigris, pube fulvescente vestitis, punctato-striatis, apice ob- 
tusis ; pedibus testaceis, tarsis fuscis ; pectore abdomineque nigris, 
griseo tomentosis, hoc lateribus fulvo-testaceis ; antennis nigris, 
basi ferrugineis, articulis 5° et 6° flavis. Long. 3-43 ]in. 3 Q. 
Head depressed between the antenniferous tubercles; face, 
cheeks, and palpi reddish yellow ; crown and occiput shining 
black. Antenne black; basal joint, except the apex, reddish 
yellow; fifth and sixth joints (sometimes also the apex of the 
fourth) pale yellow. Thorax short, rounded, convex ; sides tu- 
mid, reddish yellow, clothed with golden pubescence. Scutel- 
lum black. Llytra linear, obtuse at the apex, punctate-striate, 
setose, purplish black or tawny brown, gradually becoming 
black towards the apex, clothed with a changing tawny pubes- 
cence. Breast and abdomen dusky, clothed with griseous pile ; 
abdomen brownish testaceous on the sides. Legs reddish yel- 
low; tarsi dusky. 
Para and Lower Amazons. 
[To be continued. ] 
XXXIV.— Additional Observations on Ziphiorrhynchus. 
By Dr. H. Burmeister. 
[In a Letter, from Buenos Ayres, to Dr. J. EL. Gray.) 
[Plate VI.] 
My pear Frrenp,—I received your letter some days ago, and 
set to work as soon as possible to send you further notes on 
Ziphiorrhynchus (the outer form of which was described in the 
‘Annals & Mag. Nat. Hist.’ for February 1866, vol. xvii. p. 94, 
Pl. III.). There is no doubt that the animal is a species of 
Epiodon, the whole of the characters being the same as those 
given by you in your ‘Synopsis.’ My name Ziphiorrhynchus 
must therefore fall, there being no reason for retaining it ; but 
the species appears to me to be different, as far as I can judge 
from the drawing you have sent me. You must now study my 
figure, and compare it with the others, to find out the specific 
characters. I can do nothing here without a work concerning 
the species of EHpiodon. 
The figures which I send you show the skull from the side, 
rather less than one-fourth of the natural size, the whole 
skull, from the apex of the lower jaw to the end of the occipital 
condyle, being 75 centim. long, and each branch of the lower 
jaw 59 centim. The lower jaw is somewhat longer than the 
upper, with two round apertures (Pl. VI. fig. 3), in which are 
contained two large teeth. Fig. 4 shows one of these teeth, of 
the natural size, and fig. 5 one of the smaller teeth, which 
