92 BANGS NEW THRUSH FROM CHIRIQUI j" ^y^^f' 



chen ex Vera Paz (nine specimens), except in averaging a little 

 smaller and darker. Specimens from Coiba Island are quite 

 identical with them." 



In Washington Mr. E. W. Nelson and I compared the large 

 series of Chiriqui birds with an equally fine one of M. leucauchen^ 

 and we saw at once that the two were quite separable. Now that 

 the relationship of the Chiriqui form to M. dagnce has been estab- 

 lished, it but remains to name the former. 



Merula leucauchen cnephosa 1 subsp. nov. 



Type, from Boquete, Volcan de Chiriqui, 4000 feet altitude, $ adult, no. 

 8701, coll. of E. A. and O. Bangs, collected Feb. 25, 1901, by W. W. Brown, 



Jr. 



Characters. — Bill mostly yellowish, clouded with dusky at tip and at base ; 

 "iris hazel, orbital ring yellow"; similar to true M. leucauchen in general, 

 except in being smaller and darker — more dusky, less olivaceous, above ; and 

 much grayer, less drabby or isabella color, on breast and sides. The color of 

 the upper parts in the new form is, — dark grayish olive, darker, more dusky, 

 on head, and grayer on rump ; interscapulum olive ; wings and tail blackish, 

 edged with dark grayish olive. In true M. leucattchen the whole upper parts 

 are brighter, more reddish olive, the head but little darker, the rump prac- 

 tically the same, or perhaps slightly paler; the wings and tail decidedly paler 

 and less blackish than in the new form. 



measurements (in millimeters). 



Exposed 



No. Sex Wing Tail Tarsus culmen 



8701 (type) $ 122.0 96. 29.5 21.0 



8704 (topotype) $ 122.0 98. 30.0 20.0 



8702 " ^ 1 18.0 92. 30.5 20.0 



8705 " $ 1 19.0 95. 30.0 21.0 



8706 " $ 120.5 95- 3°-° 20 -5 



8703 " $ 119. o 92. 29.5 21.0 



1 Cnep/iosus — dark. 



