50 Alkxandkr G. Ruth\i;n 



tympanum. Specimens of P. tr.initatiis are frequently so dark that the dorsal 

 coloration is obscured, but when this does not include the ventral surface 

 the goilar band is distinct. Both in P. tr'uiitatns and P. subpunctatns the 

 coloration of the sides consists of a variegated pattern of black or brown 

 and light brown, dull }ellow or white. In the former the dark colors pre- 

 dominate and the light colors have the form of light spots or dots and 

 nearly always a short streak extending forward from the groin. In one 

 specimen there is an angular light line below the black band in front of 

 the arm. In P. subpunctatns the light color is more extensive and usually 

 forms a reticulated pattern or conspicuous round spots, and the pale streak 

 from the groin is seldom as definite as in Trmidad specimens and is usually 

 absent. 



Geohatrachus zvalkcri Ruthven.' — San Lorenzo, 5,000 to 9,300 feet. 

 Taken under leaves on the ground in the forest and under stones and the 

 stems of bromelias in the clearing at 8,300 feet. Very common in the latter 

 habitat. (PI. XI, fig. 2.) 



The coloration is more variable than indicated in the original descrij)- 

 tion. Most of the specimens are dark olive gray to olivaceous black above; 

 the belly is gray in appearance due to the combination of a blackish wash 

 and minute white dots. Some specimens have russet dots on the dorsal 

 surface, and a few are brick red above, vinaceous rufus in the inguinal 

 region, and Hay's russet on the belly. A narrow white or ochraceous tawny 

 vertebral line may be present. 



Atelopus ignescens (Cornalia). — San Lorenzo, from 5,000 to 7,000 feet. 

 A forest form, the adults of which have not been found at a lower eleva- 

 tion than about 6,500 feet; young, recently hatched, were common in the 

 quebrada Viernes Santo, from July 15 to July 24, at an altitude of about 

 5,000 feet. 



The specimens agree closely with the descriptions, and if they are cor- 

 rectly referred to this form it is probable that the species will be found at 

 lower levels in some of the large wooded valleys, such as that of the Ari- 

 guani. The adults were taken on the ground in the forest, two of them in 

 copulation on June 5. The smallest immature specimens were found at the 

 margin of a stream, but there was evidently a later migration, for after the 

 middle of July larger young were found several rods from the water. Xo 

 eggs were found. The adults are very variable in color. The belly may 

 be light orange yellow, apricot orange, pale ochraceous salmon, or dragons- 

 blood red ; the ground color of the back varies from olive to black. 



Atelopus carrikcri Ruthven.® — Paramo de Macotama, 8,000 to 16,000 

 feet (snow-line). Taken along small streams, some of them rivulets from 

 melting snow, by M. A. Carriker. X'ot known from other localities. 



According to Mr. Carriker this amphibian has a very offensive odor. 



Hypopachits pearsei Ruthven." — Fundacion. Found only under logs 

 about an open marsh where they were rather common. (PI. XI, fig.3.) 



"^ Occ. Papers, Mus. of ZooL, University of Michigan, No. 20. 

 •"^ Occasional Papers, Museum of ZooL, Univ. of Mich., No. 28. 

 ° Proc. Biol. Sac. Jl^ash., 1914, yy. 



