1887.1 ^^ [Cope. 



dence the village of Clnipada, thirty miles north-east of Cuyal a. and near 

 the headwaters of the Xingu, an important tributary of the Amazon. 

 The species embraced in the following list were obtained at or near this 

 to-vvn. I reserve any general remarks to the close of the paper. 



BATRACHIA. 



Anura. 

 Akcifera. 



1. BuFO MARGARiTiFER Laur. Abundant. 



2. ScYTOns ALLENii Copc. Procccds. Amer. Philosoph. Soc., 18G9, p. 163 



Several specimens, representing a color variety, which lacks the 

 lateral dark band. 

 8. IIyl.a melanargtrea, sp. nov. 



Vomerine teeth in two small patches entirely between the choanjB, and 

 scarcely reaching to the line of the posterior borders of the latter. Manus 

 palmated to the discs of the third and fifih digits, but not to that of the 

 third, and maiking the basal third of the second ("first"). Pes webbed 

 in much the same way ; the web reacliing the discs of the second, third 

 and filth digits, the middle of the penultimate of the first, and the base of 

 the penultimate of the fourth. 



The head is short, entering the length of the head and body, three and 

 two-thirds times. Hind leg extended measuring the orbit with the heel. 

 Hind foot short, equaling length of femur from groin. Forearm and 

 foot, and tarsus and foot, with a free posteiior edge, Avhioli has regular 

 dermal ibickenings, Avhich give it a serrate appearance. The humerus is 

 bound to the side by a dermal sheet which crosses the axilla to the middle 

 of the posterior liorder of the f^ormer. Trace of a posterior dermal fold on 

 the tarsus. No dermal process on the heel. Skin of upper surf ices with 

 small scattered warts, which are most numerous and prominent on the 

 sides. A pectoral fold from axilla to axilla. 



The head is obtuse and depressed, with canthus rostralis not evident, 

 and muzzle rather wide, and not prominent, but with vortical profile. 

 Nostril terminal ; ^ide of muzzle as long as long diameter of orbit. 

 Tympanic membrane round, three-fifths diameter of eye slit. Tongue 

 subround, with an open notch posteriorl3\ 



Color above, blacUisb gray, like a stain of dilute silver nitrate, with 

 slightly darker areas included in darker lines. One of these is a large 

 triangle whose base extends from one superciliary border to the other, and 

 whose ti uncate apex is between the scapulse : another is a large transverse 

 area across the sacrum, which extends downwaids and backwards on each 

 side. Between tliese areas are several smaller ones on the back, and there 

 is a large area on the side posterior to tlie axilla. An area encloses each 

 canthus rostralis, enclosing with the large triangle a x-^l'"Pcd area of 

 groundcolor, There is a dark gray spot <m the lip in front of the orbit, 

 and a nairow one descending from the posterior part of the orbit. A dark 



