PARUS BOREALIS. 
(NORTHERN MARSH-TITMOUSE.) 
Parus cinereus montanus, Baldenst. Neue Alpina, ii. p. 21 (1829). 
Parus borealis, De Selys-Longchamps, Bull. Ac. Roy. Brux. p. 2 (1843). 
Pecila borealis, Bonap. Consp. Gen. Av. i. p. 230 (1850). 
Parus luqubris, Fairmaire, Rev. Zool. 1850, p. 276 (nec Natterer). 
Parus alpestris, Bailly, Bull. Soc. Hist. Nat. Savoie, 1851, p. 22. 
Parus fruticeti, Wallengr. Naumannia, 1854, p. 141. 
Pecila alpestris, Brehm, Naumannia, 1855, p. 286. 
Pecila assimilis, id. tom. cit. p. 286. 
Pecila salicaria alpina, id. Naumannia, 1865, p. 370. 
Pecila salicaria borealis, id. tom. cit. p. 370. 
Pecila salicaria assimilis, id. tom. cit. p. 370. 
Parus baldensteinti, De Salis, Mem. Soc. N. H. Grisons, n. f. viii. p. 106 (1861). 
Poikilis borealis, Blasius, List B. of Eur. p. 8 (1862). 
Poikilis alpestris, id. op. cit. p. 8 (1862). 
Pecile palustris, Gerbe in Degl. & Gerbe, Orn. Europ. i. p. 565 (1867, nec Linn.). 
Pacile borealis, Gray, Hand-l. of B. i. p. 232 (1869). 
Pecile alpestris, id. tom. cit. p. 232 (1869). 
Talltita, Swedish. 
Figure notabiles. 
Bailly, Orn. de la Savoie, ii. pl. 3. figs. 1-8; Naum. Vog. Deutschl. xii. Taf. 379. figs. 2,5; 
Fritsch, Vog. Eur. tab. 21. fig. 11; Bree, B. of Eur. iv. p. 214; Sundev. Sv. Fogl. pl. xvi. 
fig. 7; Fatio, Bull. Soc. Orn. Suisse, i. pl. 2. 
3 ad. estiv. pileo summo, nucha et auchenio toto fuliginoso-nigris: facie laterali albid& posticé producta cum 
colli lateribus concoloribus utrinque pilei nigredinem marginantibus: dorso cinerascenti-brunneo, 
uropygio et supracaudalibus fulvescentibus: tectricibus alarum remigibusque grisescenti-brunneis, 
extus dorsi colore limbatis, secundariis albidiore marginatis: caudd grisescenti-brunnea, rectricibus 
cinerascente marginatis, duarum exteriorum marginibus conspicué albicantibus : gula fuliginoso-nigra, 
corpore reliquo subtts fulvescenti-albido, hypochondriis et corporis lateribus leetits fulvescentibus : 
subalaribus albidis: rostro saturaté corneo: pedibus plumbescenti-brunneis : iride brunnea. 
2 ad. estiv. mari simillima, sed sordidior : secundariis dorsi colore nec albido marginatis. 
Adult Male in summer plumage. Crown of the head, extending backwards even to the interscapulary region, 
sooty black, without any gloss; sides of the face entirely white, joming the sides of the neck, which 
are also white, and extending backwards on both sides of the head, skirting the black crown along its 
whole extent; back pale cinereous grey, slightly inclining to fulvous on the rump and upper tail- 
coverts ; wing-coyerts greyish brown, washed with the same colour as the back; quills also greyish 
