FIELD NATURALISTS' CLUB. 275 



Cancroma cochlearia Linn. Boat-bill. — One immature 

 specimen, in rufous plumage, was killed by Mr. Carr. 



Additional Notes on Birds Observed in 1893. 



Thamnojjhilus major albicrissus (Ridgw.). 



Thamnophilus albicrissus Ridgw. Proc. U. S. N. M. XIV, 1891, p. 481. 

 Thamnophilus major Chapm. Bull, A. M. N. H. VI, 1894, P- 49- 



In reviewing my paper on Trinidad Birds, 1 Mr. Ridgway 

 speaks of the " Omission of Formicarius [lege Thamno2>hilus\ 

 trinitatis and F. [lege T.~\ albicrissus described by me in the 

 Proceedings of the U. S. National Museum, Vol. XIV, No. 871, 

 p. 481." These birds were not omitted, but having overlooked 

 Mr. Ridgway'a separation of them, I included them both under 

 the names of the Continental forms. At my request Mr. 

 Ridgway has kindly loaned me the two specimens upon which 

 his descriptions were based. Comparison of the type of 

 Thamnophilus albicrisstis with seven males from Trinidad and 

 twenty males of true T. major from Brazil, apparently proves 

 the Trinidad bird to be a race of the latter distinguished by its 

 larger bill, whiter underparts, narower white edgings on the 

 outer vane of the primaries, and narrower white bars on the 

 rectrices. The character of " remiges entirely without white 

 edgings," given by Mr. Ridgway, appeal's to be a variable one, 

 dependent probably upon age. Immature specimens with brown 

 wing-coverts, like the type, have no white on the primaries, but 

 fully adult examples have well-developed margins to these 

 feathers. 



A male from El Pilar, Venezuela, and also one from British 

 Guiana, agree with Trinidad specimens, and it is probable that 

 all birds from north of the Amazon should stand as Thamno- 

 philus major albicrissus (Ridgw.). 



Thamnophilus cirrhatus (Gin.). 

 Thamnophilus trinitatis Ridgw. Rroc. U. S. N. M. XIV. 1891, p. 481. 



As stated above, Mr. Ridgway has also loaned me his type 

 of Thamnophilus trinitatis. The characters assigned to this 

 race prove evidently, in my opinion, to be due largely if not 

 entirely to individual variation. Two of three Trinidad speci- 

 mens have the back of the same color as Mr. Ridgway's type, 

 while the third agrees in coloration with a Demeraran specimen. 

 The color of the underparts is also variable. Trinidad specimens 

 may average darker below, but a specimen from Demerara is 

 fully as dark, if not darker, than one from Trinidad. — Bull. Am. 

 Mus. Nat. Hist. Vol. VII, Art. IX, pp. 321-32G, Oct. 7, 1895. 



1 Auk, XI, 1894, p. 172. 



