H 



V^' ■{ 







332 JUILLETIN :tl, l'MTi;i> srATKS NATIONAL MIISKKM. 



the lormcr, (lio otiinioid plate witlioiit siipriiorbital aiij,'I('s, the elongate 

 terminal plialaiij^e.s with siiiall basal ^-lolu', supporting; ininnte dila- 

 tations, and IIh^ nearly wehless di;;its distinj;uish it. Species of Il.vhi 

 less i'ei)i'eseMtalive ai«' similar in (cranial stiiictnre, and have a dimin- 

 ished amount of palmation, but the series appears with onr present 

 knowledfi*'! distinct in the strnelnre of the leet. Like the Ijitoiias, its 

 lite is passed on the ground, and ehiclly in tiie neighborhood of small 

 pools in open and barren situations, whi're the voiei^s of the species 

 may be heard with the Acris in the summer, lon^' alter the Ilylas have 

 souj^ht their leafy retreats in the W(M»d or fence low. Tliev dill'cr fictm 

 the first -mentioned ficnns in belli;;- pooi' swimmers; thonyh they hap 

 into the water when alarmed, they do not swim far from the shore, 

 and soon return to it. They do not scei;i to be possessed of the power 

 of making such i'liormous leaps as the liitorias of Australia, or even 

 as our Acris. In typical Kitoria the Inaiii cast* is more elongate ami 

 cylindrical and the frontoparietal foutanelh> much narrower, but in 

 /y. (niieriniiifi the form and prop')rtiuiis are the same. 



The general form and habits of the Australian ;;eniis (!rinia are not 

 very ditlerent from the present; the. terminal, not inferior, attachment 

 of the ultimate phalanx will separate it from all llylida'. 



Chorophilns is distiibiited from the I'io (Iraiide, Sail liake N'alley, 

 and llocky Mountains on the west, to the Aflanti*!, and IV(hii the (Inlf 

 to the northern limits of the Unit<'d States west of tlu^ Alleijhaiiics; 

 east of this ran^e I am not awai(^ of its occnnin^- lun'th of middle 

 Pennsylvania. Of its six species four are coiiiincd to the (Julf States 

 and South Carolina, while the fifth is found under several forms 

 throughout the whole of the ii«»rth and southwest, the northern and 

 middle parts of the central, and the middh^ of the eastern region to 

 Pennsylvania and New Jersey. 



The species differ as follows: 



I. Miizzli' roiiiidrd in prolilc, itrojictiii;^;. 

 a. Sliin <»f iipiMT siirfiiccs smontli. 



Stont, wiillli (if lifiHl at t.vnipiin.'i ciilcriiifj toliil l<'n;;lli !!..'> to 'J. (ill times; 

 nostril Jiall-Wiiy between nm/./le ami orliit ; poNteriort'oot slioitiT, slji^litjy 

 \vel)l)e(l, and willi Hiiliarlienlai' Inlierelrs ; Iwel reacliin;; tynipaninii 



''. onialHH. 



More slender ; widtii of head eiittriii;; length :> to ;!.."> times: nostril nearer 

 end of mn/,/le than orliil ; poslerior Cool longer, not vvehlied, :imiI without. 



.snbarlienlar tnlxircles; heel reacliin;; niiildle of orhit r, mciiUiiialh. 



aa. Skin warty above. 



Head acuminate, th(f width (Miterin;; the total three times; lu>el reaehin<r 



anterior to oil)it ; si/.i' iar;;er (\ iiiiridin 



Head short, wider; the. width (^nterin;; the len;;lh ;!.•.'."> limes: the heel 



reaches to the front of the orbit ; small r. lerinviim. 



Head acuminate; the widtii entering; the total '.!.ri to ii.dli times; hind hx^s 

 short; heel I'eaehin;; p.-sterior boi'der of memlirannin tympani 



r. Iriscriii tiis. 



II. Muzzle truncate in profile. 



Vertex and front plane ; can I h us rostral is shurp ; iiiiid le;;s Ion;;, .r. ociiluriii. 



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