THOdl.ODYTID.K — TIIK WREN'S. 



141 



(iiMs THRYOTHORXJS, Vieill. 



ThriHImni^, ■\'ii-.ir,i,..T, Aiialysf, ISKi, 45. (Type, Trnglodyks arundimitrv.s, " Tnujhdjitc 

 '''" /'■"•'••'""■'■," Vii;ri,i.. Oils. Am. Supt. II, 1807, 'of> = Si/Ma ludovkiuita, Lath.) 



Gk\. Ciiak. Bill cniiiinvsscd, latlicr .slender; height about one fourth the length above. 

 Culnion and .•oniiiiissuie frenily cinved throughout; gonws straight; tip very ob.soletelv 

 "olehed. Nostrils in the lov.er edge of anterior 

 e.xtrennty of the nasal groove, narrowly elliptical, 

 overhung by a .till' ,seale-like roof of the thiekened 

 membrane of the upper part of the nasal groove, the 

 cre.seentic .-dge rounded. The .septum of nost 'ils 

 miperforate; the posterior pai^t of the na.snl oavif 

 with a short septum projecting into it parallel wit'h 

 the central, not iiiTpcndieular as in Microrercnlus. 

 W nigs and tail ab„ut equal, the hitter moderately 

 rounded; the first prinmry more than half the 

 .second, about half the longest. Tarsi rather short. 



scarcely exceeding mi<ldle toe .Vnterior .scntelhe Thr^othorus imloHncianu,. 



distinet, ivst of each si,le of tarsi in a .•ontinuous plate. Lateral toes ecpial. 



_ The diagno.ses of the X„rth American s])ecies are as follows: — 



Species and Varieties. 



CoMMov rnAUArTFii.s. U.-ad above, and b,fk, of much the same color. Cris- 

 sum banvd transversely ; rest „f un.ler parts plain. Tpper tail-coverts an.l ex- 

 posed surface of win^s barred, [ris hazel. Xest in holes or with an arched 

 covering. Eggs red.ljsh-whife, spott..,! with red and i)urple. 



". Thriiofhnrns. 

 T. ludovicianus. Tail-feathers reddish-brown, barred with black. Greater 

 wmg-coverts spotted with whitish. 



Beneath yell,.w-whitish, washed oivasionallv with rustv. Sides plain 



Bill from nostril, .-I,-, Length, (i.t.H). Hah. Eastern Province Unite.l 



htates . , , , . . 



r. , ,. ••■... var. ; M (lortci a ii n s. 



Beneath rufous; lijrhu.r on throat and alomr median line. Sides 



obsoU.fely barivd with dusky. Bill f,,,,,. „„„,i,_ ,-;c. Length, 0.25 



J/'ib. Lower Rio Grande. ...... a..; ;• 



\ar. ber la udic ri. 



h. Tehnnlndiites. 

 T. bewickii. Tail-H.athens, ex.rpt central, black; the expo.sed surface and 

 tips only varied with white. Length, itjA). 



Above dark rufous-brown; beneath phimbeou.s-white ; flanks tinned 

 with brown. H,„„p and exposed secondaries distinctly ban.led. l^uills 

 and nnd.lle tail-feath..rs browni.sh-black. Length from nostril .3!)- 

 along gape, .70. Hah. Eastern I'rovinc Tnited States. var h e w icic if 



Above ashy-brown ; beneath, inclu.ling flanks, dear white ; rump 

 a.shy, and, like secondaries, very obsoletely barred. Quills and middle 

 tail-feathers grayish-brown. I/ah. Southern border of Cnite.l States 

 into Mexico . . , ' , 



„ , . ■ ■ var. I e II co<j a .i tvr. 



Colors intermediate between the two last. Bill longer, from nostril 

 .50, from gape, .HI. //«/>. Pacific Province . . . . x,ir. up il nr .i s . 



