636 ORNITnOLOGY. 



On these tree-tops many of their nests were found, tlie.se being composed 

 of sticks, and containing one to three eggs each. 



Besides the specimen in our collection, an adult, in the nuptial plu- 

 mage, was killed in May, but was not preserved ; in this specimen the fol- 

 lowing differences were noted in the colors of the soft parts : Iris, brilliant 

 green ; eyelids, and whole interior of the mouth, bright cobalt-blue ; gular 

 sac, deep orange. 



List of HpecimenH. 



V27,9jnr.; Pyramid Lake, August 13, 1807. o;!i— SL'i. P.ill, dull brownisli- 

 jellow, uciirly black ou the culuicu ; gular sac, dull cbroaic-yellow ; iris, greeuisb- 

 gray ; tarsi and toes, deep black. 



735, egg (1) ; Pyramid Lake, May 17, 1868. Nest i» top of cottou-wood tree, at 

 mouth of the rivei". 



751, egg (1) ; Pyramid Lake, May 20, 1808. Same remarks. 



Family LARIDJ^] — Gulls and Terns. 

 Blasipus heeemanni. 



Heermanii's Ctull. 



Larus heermanni, Cassin, Pr. Ac. Nat. Sci. Philad., VI, 1852, 187. 



Blasipus heermanni, Bonap., Cousp. Av., II, 1850, 211. — Lawrence, in Baird's 



Birds N. Am., 1858, 848.— Baied, Cat. N. Am. Birds, 1859, No. 666. 

 Larus (Blasipus) heermanni, SCL. & Salv., Proc. Zool. Soc. Load., 1875, 574 



(fig.).— CouES, Birds N.W., 1874, 641. 

 Larus belcheri, Schleg., Mus. PaysBas, Lari, 9 (part). — CouES, Check Li.st, 



1873, No. 531. 

 Larus {Blasipus J belcheri, CouE.s, Key, 1872, 314. 



Found only along the Pacific coast. Represented in our collection by 

 a specimen presented by Mr. Parker. 



List of specimens. 



429, " i juv.; Bay of San Francisco, February 20, 1868. 173—42— (?)— 10." (Pre- 

 sented by H. G. Parker.) 



