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2(52 



lUTLLKTIN :U, UMTKIi STATKS NATIONAL Ml'SKHM. 



(H' llu' spfcics above (Icliiu'd, I lie /.'. ci>himhinisls ami ilic //. Iinliiji 

 uomtti an' IIk' imiI.v (Hics wliicli displa.v aiiv ^ical \ analulil.N , tl:r hitler 

 liiiviiiK" lour well (leliiied siihspecies. Tiiev are also naturally tlic 

 species wliicli present allinitles to otiier species. Tims tlie /.'. hiifit/i- 

 vnsiis sometin)es approximates, witliont hecominii' eonl'iised with, the /.'. 

 coffnatiis, and tiie latter in tarn varies towards the /;. coiiipdctiliN. 



IM'i'o I'l'NCTATls li. A (J. 



Proceed. Ac. I'l' i., IsV.', ]i, IT;!: Uaini, f. S. Mrs. Ilniiiiil. Smv.. vul, n, 

 Ih'pi. i>. late \xxix : li;;.s. Ti-T (imiI ;;iiih1>, Is'i'.t. 



Ilii/o IkIiHiiiiH Varn.w, I'mceed. f. S. Nat. Mils.. I'--,'. |i. 111. 



The head is wide and Hat, and t'nters the total len;;th three and a third 

 times. The width at the |>()sterior borders of the tympana exeteds the 

 lenjith by the diameter of the eyelid. The latter is aitoiit I'onrlilths 

 tln^ very Hat interorbital rej^ion. Tin* only eianial rid;;*' is the vertical 

 one which extends I'rom between the eyelid and the paidioid j^land 

 along the front of the tymi>anic nuMnbrane. The lattei' is very distinct 

 and is nearly round, and is Jnst half the long diametci' o*' the eye. Tlu' 

 prefrontal bones are rather prominent at thecanthiis rostralis. and are 

 roughened with raised points. Theendof tlu' mn/zle is strongly convex 

 in protile, its extremity oveilapping the premaxiilary border. The 

 nostril is nearer the extremity than it is to the orbit. The gianidar 

 i-onghciiing is present on the extremity of the nose, on the posterior 

 part of the vertex, on the eyelid, the prelym panic ridge, and on the par- 

 otoid gland. The tongue is narrow and subcylindrical, and tlie <;hoana> 

 are large and anterior. 



The parotoid glands are sul)triangular to round in outline, and are as 

 wide as or wider than long. Tiie warts of the dorsal integunnMil are 

 quit*' snnill, and stand nearer together on the sides than on the median 

 region. The derm of the inferior surfaces is not roughened nor granu- 

 lar, oxeei)t for a shoit space on the gulai' regi(Ui. but is more or lessdis- 

 tiiu'tly areolate. The external surface of the arm and of the tarsus and 

 hind foot and of the entire sole isspinulo.se; on the superioi' surface 

 of the tibia the spinulose tul)ercles are mingled with larger tubercles. 

 When the jjosterior liiid>is extended the end of tin' tarsus r«'aches the 

 anterior border of the oibil, and from that point in a few instances to 

 the end of the niuz/lc. The first llngeiis longei' than the second. The 

 jiosterior foot is lallier small, and the web is deeply emaiginate to 

 opposite the middle of the lirst (fotiith) plalange of the fourth toe. All 

 the toes have a narrow «lerinal margin to their (extremities. Suhdigital 

 tubercles not large, single. The two metatarsal tubcicles are distinct, 

 the internal (piite narrow, and with piominent obtuse extiemity ; the 

 external rounded, and not presenting a free vd<xv. 



In large speciiiKMis from Lowei' ('.ilifornia the tnlteiclcs ar. coarser, 

 and the granular rugositi(;s of the heati smootlie(| otV. There is a trace 



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