444 Mr. C. Chubb on new 



like ihem, nor, as Dr. Ilartert informer] me, liaJ tlioy anytliing 

 comparable in the fine series at Tring. 



I ])roposo, therefore, to distinguish this new form by the 

 name of 



Poecile atricapillus elence, subsp. n. 



Adult. Differs from P. a. mo)danus in having the upper 

 parts smoky grey washed with olive-brown — the top of the 

 head and the nape pure dull black, as compared with brownish 

 black, — the white cheek-patches more restricted, and the 

 black of the throat extending further on to the breast (as in 

 P. a. atricapilUis). 



The underparts are greyer and the flanks only very faintly 

 washed with fawn. 



Freshly moulted wing- and tail-feathers in the adults are 

 dark slaty in coloration, darker than in P. a. horealls and 

 very much darker than in P. a. montanus. 



In the four " birds of the year'' the general coloration is 

 still darker, the contrast between young examples of P. a. 

 elencv and P. a. horealis being very striking and obvious 

 indeed (mantle dark olive-grey^ as contrasted with pale grey- 

 brown). 



Young P. a. elence are very noticeably darker even than 

 young Ijirds of the Japanese form P. a. restrictus, while, as 

 an indication of their dark coloration, they are darker than 

 P. palitstris poecilopsis, Sharpe. 



jPype in Brit. Mus. ? juv. Breuil, Valtournanche, N. Italy, 

 27. vii. 21. Coll. P. E. Lowe. Reg. Brit. Mus. 1921. 8. 2. 7. 



I note little in the measurements as between P. a. horealis 

 and P. a. elence. 



In choosing a juvenile example as the type, I do so because 

 it seemed to be possible to gain a more accurate perception of 

 colour-differences in fresh-plumaged juveniles, and it is just 

 as easy to compare juveniles with juveniles as adults with 

 adults of various races. 



XLVil. — On new Forms of South- American Birds. 

 By C. Chubb, M.B.O.U., F.Z.S. 



StiirneUa magna monticola, subsp. n. 



Adult male. Differs from S. magna meridionalls, Sclater, 

 and S. majna par alios, Bangs, in being chestnut-brown on 

 the upper surface instead of blackish and the general 

 measurements smaller. 



