INDEX 



New names are printed in heavy type. 



43 



44 



11 



170 



3 



3 



170 



16 



125 



125 



125 



Acacia dolichostachya 



gaumeri 



Acanthis linaria 



Acarina -- 



Accipiter cooperii. — 



velox 



Achorutes armatus - 



Actitis macularia 



Acutalis.-.^ 124, 



semicrema 



+ Q T"t S1,T*P9, 



Adams, C.C. Note on the Roose- 

 velt Wild Life Experiment 



Station 



Agelaius predatorius 



Aix sponsa - 



Alcelaphus._ - 



Aldrich, J. M. Exhibition and 

 Notes upon caterpillars of 



Coloradia pandora Blake _... 



An Entomologist in Alaska 



Alecto 78, 



Alvania burrardensis 



sanjuanensis. — 



Amecystis - -- 



Ames, Oakes. Additions to the 



Orchid Flora of Panama 149-154 



Xll 



17 

 3 



77 



IX 



xiii 



137 



38 



37 



147 



Ammodramus australis. 



Ammospiza nelsoni 



Anas arcuata 



javanica - 



platyrhyncha... 



rubripes - - --- 



tristis 



Anchoviella helleri..._ 



Anobiidae 



Anser albifrons 



Anthracoceros- — 



Anthus rubescens- - 



Antrostomus carolinensis 



Aquila chrysaetos 



Aradus debilis- 



proboscideus 



similis - 



Archasia 126, 



belfragei 



galeata 



Archilochus colubris 



Ardea herodias - 



Arenaria morinella.— - 



Aristonetta valisineria 



Ashbrook, F. G. Recent Notes 

 on the Fur Trade in the 



United States 



Asio flammeus , 



wilsonianus 



Aspilia nigropunctata 



Asteromyia carbonifera 



Astragalinus tristis 



Astur atricaaillus.- 



Atheta frosti -- 



pennsylvanica... 



polita - 



virginica 



Atymna l'^'* 



17 



11 



166 



166 



14 



5 



14 



47 



169 



6 



136 



21 



10 



9 



167 



167 



167 



127 



127 



127 



17 



15 



8 



15 



Xll 



9 



3 



119 



87 



4 



9 



59 



59 



59 



59 



129 



Baeolophus bicolor 4 



Ball, E. D. The Smallest known 



Leaf Hopper 23-24 



Bangs, Outram, and Thomas E. 

 Penard. Lophotriccus versus 

 Cometornis 78 



A New Name for Pachy- 



ramphus polychopterus costa- 

 ricensis Chubb 78 



Descriptions of Six New 



Subspecies of American 



Birds 89-92 



Bankia - 25, 26 



inexicana._ 27 



zeteki 26 



Banklella 25, 26 



Barbour, T. On a Small Collec- 

 tion of Reptiles from Argen- 

 tina - 139-142 



Barbour, T., and E. R. Dunn. 



Herpetological Novelties.- 157-162 



Bartramia longicauda 16 



Bartsch, Paul. Note upon the 

 acquisition by the National 

 Museum of the Hirase Collec- 

 tion of Japanese and Pacific 

 MoUusks Jx 



Note upon a Mocking- 

 bird wintering in the city of 

 Washington.- 



Note on rapid deteriora- 



tion of pulp paper in books.. 

 Note on local presence of 



Holboell's Grebe ..- 

 Note upon a 



Scientific 



Column in a Local Newspaper 



A New Classification of 



the Shipworms and Descrip- 

 tions of some New Wood 

 Boring Mollusks 



New Marine Mollusks 



from the West Coast of 

 America 



Bassler, R. S. Paleontological 

 work at the National Museum 



Sex characters in Fossils.... 



Berry, S. Stillman. Notes on 



some Japanese Cephalopods.... 



Blake, S. F. Sexual differences in 

 the coloration of the Spotted 

 Turtle 



New Trees and Shrubs 



X 



xi 

 xi 



xii 



25-32 



33-40 



X 



xiii 



from Yucatan 



New Meliaceae 



from 



Mexico •.-- 



A New Aspilia from Trim- 



dad... 



Blaniulus - 



guttulatus 



Bolitotherus cornutus.. 

 Bombycilla cedrorum,. 



Bonasa umbellus 



Borboridae 



Botaurus lentiginosus.. 



43-46 



115-118 



119-120 



83 



83 



168 



4 



3 



85 



15 



36— Proc. Biol. Soc. Wash., Vol. 34, 1921. 



(193) 



