78 BULLETIN 51, UNITED STATES NATIONAL MUSEUM. 



P. 764. Notes on a collection of fishes obtained in the Gila River, at 

 Fort Thomas, Arizona, by Lieut. W. L. Carpenter, U.' S. 

 Army. By Philip H. Kirsch. 



pp. 556-658. 



P. 755. Notes on some neotropical birds belonging to the United States 

 National Museum. By Hans von Berlepsch. 



pp. 559-566. 



P. 756. On the classmcation of the mail-cheeked fishes. By Theodore 

 Gill. 



pp. 567-592. 



P. 757. Gleanings among the Pleuronectids, and observations on the 

 name Plcuronectes. By Theodore Gill. 



pp. 693-606. 



P. 758. Note on the genus Spheroides. By Theodore Gill. 



pp. 607-608. 



P. 759. A list of fishes from a small tributary of the Poteau River, 

 Scott County, Arkansas. By Charles H. Gilbert. 



pp. 609-610. 



P. 760. Descriptions of new Braconidse in the collection of the U. S. 

 National Museum. By William H. Ashmead. 



pp. 611-671. 



VOLUME XII, CONTAINING PAPERS 761-789. 



Smithsonian Institution. | United States National Museum. | | 



Proceedings | of the | United States National Museum. | 



Volume XII. | 1889. | | Washington: | Government Printing 



Office. | 1890. 



8vo., pp. viii, 1-686, 23 pis., 14 figs. 



P. 761. A review of the genus Xiphocolaptes of Lesson. t By Robert 

 Ridgway. 



pp. 1-20. 



P. 762. A review of the genus Sclerurw of Swainson. By Robert 

 Ridgway. 



pp. 21-31. 



P. 763. Descriptive notes of new genera and species from the Lower 

 Cambrian or Olenellus zone of North America. By Charles 

 D. Walcotjt. 



pp. 33-46. 



P. 764. New North American Acrididre, found north of the Mexican 

 boundary. By Lawrence Bruner. 



pp. 47-82, 1 plate. 



P. 765. Contributions to the natural history of the Commander Islands. 



A. Contributions to the history of Pallas' cormorant. By 

 Leonhard Stejneger. 



B. Description of some bones of Pallas' cormorant, Phala- 

 crocorax perspicillatiLS. By Frederic A. Lucas. 



pp. 83-94, 3 pis. 



