INDEX 



New names are printed in heavy type. 



Abramis erysoleucas 59 



Acalypha virginica. — 130 



Acer rubrum 131 



saccharinum 131 



Achillea millefolium.. 130 



Achirus fasciatus 72 



Achyranthes crassifolia.. 241 



Acipenser brevirostrum. — 53 



fulvescens 52 



sturio 52 



Acoenites— 48 



JEsopus sanctus 250 



Agelaius floridanus 196 



Agrostis hyemalis 129 



Alcedo grandis 22 



megalia 22 



Alnus glutinosa 131 



rugosa 131 



Alosa sapidissima.. 55 



Alsophila scabriuscula 125 



Amblodon bubalus._ — 63 



Ambloplites rupestris 67 



Amblytelinae 48 



Ameiurus catus 56 



melas 57 



natalis 56 



nebulosus. 56 



nigrilabris 57 



Amiatus calvus . 53 



Ammocrypta pellucida 70 



Ammotrecha tabogana 211 



Amphidromus canabunganensis 182 



secamensis 182 



webbi 183 



Ana?retes agraphia 263 



Anaphothrips speciosus 76 



Anas percna 93 



Anderson, R. M. Recent Zoological 



Exploration in the Western Arctic xii 



Anguilla rostrata 65 



Anoa 45 



Anuraphis bakeri - 186 



crataegefoliae 186 



Apeltes quadracus 67 



Aphelocoma 136 



Aphidius 48 



Aphrastobraconini 48 



Aphredoderus sayanus 67 



Aplodinotus grunniens 71 



Arabis 132 



Asarcia— 200 



Asemothrips 83 



picturatus 83 



Aster cordifolius._ _ 130 



linariifolius 130 



patens 130 



Athysanus miniaturatus 26 



pi rat us 26 



Atlapetes majusculus 113 



Attila cinereus... 127 



rufus. 127 



Azalea nudiflora 130 



Bailey, Vernon. The Western Skunk 



Cabbage in its Prime.- x 



The Explorations of Maximil- 

 ian, Prince of Wied, on the Upper 



Missouri in 1833 xii 



The Bean Mouse of Lewis and 



Clark, Maximilian, and Others, il- 

 lustrated by Living Specimens of 

 this and other Small Rodents of 



North Dakota xv 



Baird, G. W. Exhibition of a Collec- 

 tion of Seaweeds xiv 



275 



Baird, S. iZZZZZZZZZZZZZ! 271 

 Baker, A. C. Intermediates in the 

 Aphididae and their Relation to 

 Alternate Hosts xi 



Fitch's Thorn Leaf Aphis. 185-186 



Barbour, Thomas. A New Rock Igu- 

 ana from Porto Rico 145-148 



Barrows, W. B 275 



Bartsch, Paul. Note on Annual Visits 



of a Purple Finch xi 



— Notes on the Tameness of 



Some Red-breasted Nuthatches xiii 



Results of Cerion Breeding .... xiii 



Critical Remarks on Philip- 

 pine Island Landshells with De- 

 scriptions of New Forms 15-20 



Critical Remarks on Philip- 

 pine Island Land Shells 177-184 



Two New Landshells from 



California 247-248 



Basileuterus superciliaris 265 



Bean, T. H 272 



Blake, S. F. A New Salvia from Guat- 

 emala 187-188 



New Plants from Sinaloa.. 189-194 



Boleichthys fusiformis 71 



Boleosoma nigrum 70 



olmstedL_ 70 



Bothriechis._ 214 



Brachycyrtinae 198 



Brevoortia tyrannus 55 



Bubalus 45 



By-Laws, Amendment to x 



Callimerus albescens. 232 



albus 233 



arcufer 233 



basilanicus 231 



bornensis. 228 



fenestratus 232 



flavus 233 



fuscitarsus._ 230 



hexagonus 229 



intricatus 227 



lateralis 230 



luzonicus 230 



cculatus 229 



57— Pboc. Biol. Soc. Wash., Vol. 32, 1919. 



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