'I 



I ill 



]'• i 



39G lUiiJ.KTiN ;u, rxiTKi) .statko national MrSKUM, 



I. lli;i'l of cxtfiidiMl liiiiil liiiil) ii'atliin^^ Icmr licvoi d rxtrniiity of imi//.li'; vomcriiio 

 t<>i>tli fiilirrly lii-t\v<M'ii I'lioiinii'. (No lilack <'ar-|ialcll.) 



Dorsal (It'iitiiil |ili('ir timi, usually iiumi' than two Itcl ween tli" lateral oiioh; 



spotH usually siiiallfr, riniiult'il ; males witli vocal sues A', rinbccns, 



II. Ileol of cxtemled liiiid liiiil) not reaeliliifj end of nin/./lo ; voiiieriiie teetli lietweeii, 

 l»nt projeetinj; itosterior lo posterior Itoider of (dioana'. (No black ear- 

 pateli.) 

 n. Mules witli an external voeal vesicle, 



A dorsolateral deiinai fold, witli olliers lietweiiii ; tlirce phal<tii){eH of fourth 

 toe free from wel); lejjs cross liarnd I!, ttvinlata. 



Dorsolateral fold only; two ]diulan^ies of fourth too freti from wed); lictd 

 scarcely reacliitiK lynipanntn, wliieli is nearly as larjje aseyc ; brown, with 



HTuall ^ray (or in life irieen) spots 11. moulcznnuv, 



oa\. No external vocal sacs in males. 



Four dernnil dorsal ridges; two plialunnes of fonrtb toe free; colors pale 

 with rows t)f lai'ne <| ""<''" l*^ lirowii spots li. inilimli in. 



Dermal fold, si/e ot' tympaniini, and extent of widi variable; lenj;tli not ex- 

 ceeding <> c(nlimeteis; larj;e dark spots on liack I', n<iil(iiliiinittHii. 



A «lor8oluteral dermal told; web Icavin;; t wo phalaii^eH of I'onilb loi< free. 

 ?io dorsal spots ; size not exceed in;; H centimeters J!, i hdiKtta; 



No dorsolateral dermal fold; \\i'\> i/i i.iritHii leaving one phalange of fourth 

 digit free ; length reaching 'M centimi'ti;is Ji, vtitoibidna. 



III. Ileol not reaching end of mn/zle ; vomerim- teeth behind choaiue. (A black cur- 



patch.) 



Usually two phalangesof fourth digit free; inteinal cuneiform tubercle small 

 J{. Itmpotaria. 



Usually three |»haluiiges <>{' fourth digit free; iiiteriuil cuneiform tubercle 

 Inrgu uiul prominent ; middle of buck rurely Hpottcd ; small, si/e .''> centi- 

 meters //. riiiildhrigi Hhi/i, 



IV. Heel reaching or exceeding end of iiiuzzle, vomeriiio toeth behind chounu'. (A 



black ear patch.) 

 • oc. Tympanic disk distinct. 



Head short, obtuse, entering h-ngth ;{.5 times; third phalange of fourth too 

 bordered by web and last two free; cross-bands of tibia imperfect or 

 very few, dorsal spots small (in Ainei ican subspecicis) A'. (Kjilin, 



Head obtu.se, entering length about three times; palmatioii 1 <iyring pe- 

 nnltimat(> phalange, leaving the last one free; dorsal spots liirge ; size 

 large, reaching I'i centimeters A', (tidnloni. 



Head acute, three times in length; back without largo spots; wt!b borthir- 

 ing uiitepenultimate phulauge, leaving two (reo; small, length ."> centi- 

 meters It. nilra lica. 



aax. Tympanic disk conceabd. 



Head obtuse; p.itmation extending to base of last phalange; skrii thick, 

 glandular; size small J{, boylii. 



It may be seen from the above table that the species of Kaiia found 

 ill North Ameiica are (;lo.sely related, and that their discrimination re- 

 quires clo.se attention. More or less numerous exceptions to the dcflui- 

 tive chariicters above given exist, and increase the difficulty of distin- 

 guishiiij; ihem. Thus the hind legs of the liana palmtris are of variable 

 lengths, iibout half the specimens Iniving them long, as in //. riresccns. 

 In the latter, the vomerine teeth in the subsi»ecics Hriu-hycephala fVe- 

 quently are placed a little posteriorly, as in the Ji. palmtrh. The latter 

 again sometimes has four dorsal ridges, as in R. virencens. Sometimes 



