74 bulletin: museum of comparative zoology. 



213. Arundinicola leucocephala (Linne). 



Four specimens, all adult males, Vicinity of Paramaribo, March, 

 April, May, and August. 



214. Colonia leuconota poecilonota (Cabanis). 



Type-locality. — Canuku Mountains, British Guiana. 



Two adults, dl and 9 , Javaweg, April. 



The Guiana bird is certainly a strongly marked subspecies. 



Lafresnaye's three cotypes were probably from Bogota. The 

 original labels, in his own handwriting, read " Copurus leuconotus 

 nob. (Colombie)." The specimens agree perfectly with numerous 

 birds from Colombia, Panama, and Costa Rica, in the M. C. Z., and 

 differ conspicuously from the Surinam specimens. 



The Guiana bird is much larger throughout, with a heavier bill. 

 The pileum is clearer gray, less sooty, and the general coloration is 

 much blacker and less brownish, with very little grayish on the middle 

 of the bellv. 



The tail is measured to the end of the normal rectrices, disregarding 

 the long central pair which vary too much. 



215. Placostomus coronatus gumia, subsp. nov. 



Tijpc.— M.C. Z. 80,961 (964 0. Adult cf. Vicinity of Para- 

 maribo, Surinam, 20 March, 1914. E. Graanoogst. 



Characters. — Similar to P. c. superciliaris (Lawrence) and of same 

 size, but appearance of head different; the black margins of the 

 crown-patch very narrow and obscure over the eyes; the russet sides 

 of the crown-patch extending to the black margins without any dull 

 olive-brown edge, and to the base of the culmen without any dull 



' Penard Coll. 



