4.">.S rHOCI'J'.hlSCS Oh' the nation. ll. MISEHM. vol. xxi. 



Hliciik lilic. tlic. ciowii; lower siirCiKM' biowiiisli wliilc, iiiitnioily witli 

 (iiKMluHky iiiiirkiiijis; .sides iiiiil llsuiUs pale browiiisli ^-ray, llie hittcir 

 iiioic riifescent; (irisHiiiii |»;il(i (»eliracw)UH, burred witli bla<;k. 



'I'hrjionKincs h. dri/vKrciis inay l)e distiiijj^niKlied iroiti T. h. ehtirirntnruH 

 by latlier psiUM-. d<'(ide(lly inoie, nires<;eiil llaiikK and upper Hiiilsice, 

 lo^ctliei' with soirxMvlia-t HJiorter tail. ( !()iiipar(Ml with rrmiopliiliiH, it 

 is (huker, iiioic ruleHceiit above, with a somewhat more prominent 

 superciliary stripe, and decidfMlly shorter winjf and tail. 'I'he, eharae- 

 ters wliieh sei)ara.te tlri/iudciis from crifplns consist in lather <bu'k(!r 

 (lanks and upper sin lace, rathci' more (conspicuous superciliaiy strip(;, 

 somewhat more heavily and rejfuhirly barred erissnm, niiich shorter 

 win^' and tail. It. dilTers IVom Iriicophriis in much more rulesccnlcolor 

 above, more heavily liarred crissum, and much shoitcr <'nlmen. 



A spring specimen IVom VVheathind, ( 'aliforiiia, is, by reuson of its 

 (birker, more sooty color al)ove, s(»nM'what interm<'diat<'. l)etwe<ui ///•//• 

 iHiiciis and sjHliifKs, l)nt seems to be nearer l/iie Ibrme.r. ( )ne example 

 from Stanford University, taken in March, seems to be without doubt 

 leleiable to ilrynia-cuH, {]\m\ii;h all the othei's from the same locality are 

 typical Npiluriis. One of the wint/Ci' bii'ds fiom I'asadeim, (vulifornia, 

 and an ()<!tob(a' specimen IVom (!alabasas, Ari/,oim, apparently also 

 IxOonj;' to the ju'esent race. 



Youn^' birds in tiisl, pbnnage are distinjfiiisliabie (Venn those of char- 

 icninriis l)y th(Mr inucli more rufesccnt c()h)ration. 'I'hey aie, appiccia- 

 biy ])aler tlian the youn;;' of calopkonuH. 



Twenty fhre(^ specimens of this form have been examined, represent- 

 inj,' the followinj^- localities, i)re('<lin^' recoids beinj;' desi^jinated by an 

 asterisk: 



(Jalifoinia : KanWinwon; Jackson ; .lolon ; ^IN'Jon Mountiiins;* Walker 

 JJasin; Haiid;* Ajicr;* I'lacerville; Wheatland ;( loulterviHe;* Sacra- 

 nu'iito; Yr<Uia;**Los Angeles; (Jalave-ras (bounty ; I'asaderia; Stanford 

 University; Nevada City. 



Arizomi: Cahibasas. 



THRYOIVIANKS BEWICKII SPILURUS (Vigors). 



'/'rof/lixli/lrH xpUiiriiH Vkjokm, ZooI. Voyiijio HI<»HH<nn, WM, j) 18, jil. iv, (ifj;. 1. 

 TliriiDlhoniH livw'uhii var. HpiluvKH liAiitn, Iv'ov. Aiiuir. lindH. \HM, 1, p. 12() (iti pint). 

 TliriiollioriiH HiiiliiriiH (looi-Klt, IJirdH (Jiilif., 1S70, I, p (>!( (in part). 

 I'll ri/omd III N haii'irliil HfiUuriiH JtiiKiWAY, liiill. IJ. S. (jooI. iiiid (ico;;. Sim\ . I'orr., 

 ISTC, II, No. 2, p. ISO (in |»art,). 



(Uutrs. siihsp. — Thryomaiies T. b, drymoeco similis; sed notaeo, 

 lateribus, hypochombiisipie conspiciie obsiauMoribiis, hand dillicile 

 dij;nosceinbis. 



McosiocincHtH {is HpcAumcuH). — Wiuf^, 4'.) to 513.5 (averaf^e, 51,1) mni.; 

 tail, 15 to52 (averafio, 41). 1 ) mm.; (ixjmsed culmen, 12.5 to 1 1.5 (averajjfe, 

 l.'j,4)mm.; bill IVom nostril, I> to II (averajje, !>.S) mm.; tarsus, 17 to 

 10.5 (}iv(^raf;e, 18.5) mm.; middle toe with (;law, 15.5 to 1(>.5 (average, 

 l(i.l) mm. 



