TABLE OF CONTENTS 



Officers and Committees for 1921 _ m 



Proceedings for 1921 ix-xiv 



Birds of the Washington Region, by May Thacher Cooke 1-22 



The Smallest Known Leaf Hopper, by E. D. Ball 23-24 



\^ A New Classification of the Shipworms and Descriptions of 



some New Wood Boring MoUusks, by Paul Bartsch 25-32 



New Marine MoUusks from the West Coast of America, by 



Paul Bartsch 33-40 



Two New Legumes from Mexico and Costa Rica, by C. V. Piper.. 41-42 



New Trees and Shrubs from Yucatan, by S. F. Blake 43-46 



Notes on Three Clupeoid Fishes Collected by Edmund Heller in 



San Filipe Bay, Gulf of California, by Carl L. Hubbs 47-48 



Mutanda Ornithologica. X, by Harry C. Oberholser 49-50 



Five New Genera of Birds, by J. H. Riley 51-54 



Four New Birds from Celebes, by J. H. Riley... 55-58 



Additional Fungous Insects and their Hosts, by Harry B. 



Weiss and Erdman West 59-62 



Food Habits of Sceloporus graciosus graciosus (Baird and 



Girard), by Herbert J. Pack..... 63-66 



Descriptions of Sixteen New Murine Rodents from Celebes, by 



Gerrit S. Miller, Jr., and N. Hollister 67-76 



General Notes 77-80 



The names for Two Genera of African Artiodactyla, by N. 

 Hollister, 77; Lophotriccus versus Cometornis, by Outram 

 Bangs and Thomas E. Penard, 78; A New Name for Pachy- 

 ramphus polychopterus costaricensis Chubb, by Outram 

 Bangs and Thomas E. Penard, 78; Textor Temminck versus 

 Alecto Lesson, by Harry C. Oberholser, 78-79; Hyphantornis 

 Gray becomes Textor Temminck, by Harry C. Oberholser, 79. 

 The Julidae and Isobatidae in North America, by Ralph V. 



Chamberlin... 81-84 



Diptera and Fungi, by Harry B. Weiss..... 85-88 



Descriptions of Six New Supspecies of American Birds, by 



Outram Bangs and Thomas E. Penard 89-92 



Twenty New Mammals Collected by H. C. Raven in Celebes, 



by Gerrit S. Miller, Jr. and N. Hollister 93-104 



Mutanda Ornithologica. XI, by Harry C. Oberholser 105-108 



A New Ophiuran of the Genus Ophiopsila from Southern Cali- 

 fornia, by Austin H. Clark.. 109-110 



A Neglected Fern Paper, by William R. Maxon... 111-114 



New Meliaceae from Mexico, by S. F. Blake 115-118 



A New Aspilia from Trinidad, by S. F. Blake 119-120 



(V) 



