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388 U. S P R. R. EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT. 
In the group, as defined above, are embraced several genera of modern systematists. Thus 
the true black-capped American titmice are placed under Poecile of Kaup, where possibly they 
belong. The species may be arranged as follows: 
A. Head and neck above and below entirely black ; their sides white. (Poecile.) 
Outer tail feathers and the tertiaries conspicuously edged with white. Outer edges of 
greater wing coverts also nearly white. 
Largest. Wing, 2.70 inches; tail much rounded, or even graduated, exceeding 3.00, 
OF longer, Chan) WANES s..cis-\cecassnevesccecevessecnsesdnteesieioerssepsects SCDLERIMLONGIS. 
Wing and tail about 2.50 inches, and nearly equal. Tail nearly even. Body 
beneath white, tinged on the sides with brownish yellow... 
Size and shape much like the last. 
wee LP. atricapillus. 
Tail more rounded. Beneath pale yellowish 
rufous brown, lighter only along the median lineé....................2P. occidentalis. 
Outer tail feathers and the tertiaries pale grayish, not white. Greater wing coverts 
without paler edges. Tail nearly even, shorter than the wing. 
Wing, about 2.60 inches; tail, 2.45. Beneath plumbeous; similar to the back, 
Only palericmces.sdoscsnesieedsoateessecereseseneeess pBriaBeaEeneBAGbe das dascene tas MCNLQLON ALIS: 
Smaller. Beneath white, faintly tinged with reddish brown, conspicuously 
different irom: thet backs s.c.cccesacoestoeaorjocbsinececarsacjees see stn onarh fe uCOTOUNENSIS. 
B. Crown and throat black, with white frontal and sarereiary stripe. 
Above plumbeous ; beneath white...... dhocdanachs csemenswaaspiseciiesmecemecce strc) MILOMUQICUSs 
C. Throat sooty brownish ; sides of body bright reddish brown. 
Back and wing coverts chestnut brown; crown not very different from the 
throatctecssscnes SaaS as ORE Ses coe e oO OTE Re oew aes e ae ome es sStlowosena ee drsena ese me LILES CENSs 
Back grayish olive brown. Crown similar.........cccccsssesesesererenneee DP. hudsonius. 
Comparative measurements of species. 
Catal. Species. Locality. Sex. | Length, i Stretch Wing. Tail. [tarsus Middle Its claw) Bill Along | Specimen 
No. | of wings, | toe. alone. | above. | gape | measured. 
= | | 
3704 | Parus septentrionalis...] Salt Lake Citysssees|seeees [x5 s40 slices strc | 0.68 | 0.58 0.18 -| 0.34 0.40 | Skin..... 
New Mexico.......|...s0+ |) (5580) ieee sae | Legs | broken.|....++. | 0.40 | 0.42 | Skin*.... 
Black Hills, Neb...|..... 5580) Slias-cteivels 0.64 0.60 0,22 0.38 0.46 | Skin..... 
cceeee WO seeeee eeeees serene) 5.75 B25 | 2.75 lacenceee|ecereens|seeeeeee|eneeeee: leseeeeen| eee ceee Fresh.... 
Fort Mass., N. M... Q DOOM heise aes = 262)", 2.98 0.64 0.58 0.18 0.34 0.40 | Skin..... 
CRANE A noccnoco 2.50 2.50 0.62 0.55 | 0.18 0.36 0.40 | SKinvveee 
5.00 7.75 OG aandieStiol Sitios H0ms eccecleceren sleeves ceeelecceaces Fresh 
levee seer veeeee ALTA | wees eee 2.50 2.44 0.60 0.56 0.20 0.36 0.42 | Skin..... 
Meas dO Meeceareranc neers 4 Of a7 e750 orate || esene Feeeoncs| aoopme loser) eccdnary jassroads | Fresh... 
Fort Vancouver....|....0. 5.00 | ....66.- 2.46 2.50 0.64 0.56 0.20 0.36 0.42 | Skin..... 
PYIIIOO Os scccveciosss|sccccs| 4000 TE) |GSSA8eee poeeboed socooade secuBeads Mrcerdos Derricaod bocccoca faut. 
Shoalwater bay ....]...... 5 700M ieertets:s << 2.42 | P45) 0.66 0.60 0.20 0.36 0.44 | Skin..... 
sioees GOs ces0: cece ily cesta || monOU WOON Ilseciccss|ecesecaslece eon Tesececslacasiiece|| sss cieseel RCSD 
MexicOccesveciesesl teers 5.00 |... 2.60 | 2.54 | 0.68 | 0.56 | 0 18 | 0.36 | 0.42 | Skin..... 
Washington, D. C..| 4.60. | ceccccce| 2,50 2.50 | 0.60 0.54 0.20 0,32 38 | Skin 
eocees CO apsoncrianda) |heerias 4.62 | 7.00 |... cccclecccccccleccecccclercecccelecssccos|sccccccs|rere cece Fresh... 
Meuicine Bow er’k.| © | 550) | (sss cecu|eees90 2.90 | 0.78 0.58 0,20 0.44 0,50 | Skin..... 
«| Californians c/sses|ocsce | 5.00 eeerencer } 2.58 2.44 | 0.64 0.64 0.21 0 42 0.42 | Skin..... 
{ 4280) [se ccuene 2.70 2.58 | 0.72 0.60 0.22 0.42 0.44 | Skin... 
E00) a8 200 |e a wcttes sl ees. cece ister allictars.sie'eiere| eteieleie cin osieielelele | sieisrereinen | Fresh.... 
AVAGB: llaeseieects | 2,36 2.16 0.64 0.60 0.18 0.35 0.40 | Skin... 
. 4.7 RESO | eieacseoesl|eatsicele lawelse eeeatea tal sowlesce| see sluice! seteisieees | Fresh.... 
San Francisco....- Sep aeoek ele Gancecn | 2,42 2.30 0.64 0.56 0.18 0.40 0.44 Skin 
2926 | Parus hudsonicus ......| Canada? ......sees}.eree- STA |icaceecies 2.40 2.66 0.70 0.55 0,19 0.38 0.44 | Skin..... 
an EE \ | 
* Very poor specimen. 
