178 



Tlie Biological Society of Washington. 



Page 



Mictomj's 57. 60-63 



Mictomys dalli 62 



iumiitus 61 



truei 62-63 



wrangeli 63 



Mikania scandens 35 



Miller, Gerrit S., Jr. ; Central American 

 Thyroptera 109-112 



Milk dentition of Desmodus 113-114 



Subgenera of Voles (Microtinoe) viii 



Monarda punctata 37 



Monotropa hypopitys 36 



Moore, V. A. : Flagella of motile bacteria 



with special reference to their value in 



differentiating species vii 



Muhlenbergia sobolifera 41 



Musdecumanus 94, 96 



musculus 95 



rattus 94 



volans 164 



Muscari racemosa 3^ 



Mustela americana i3- 5^ 



boccamela 20 



cicognani 18 



erminea 7 



frenata 9 



fusca iS 



longicauda 7 



pennanti 5i 



pusilla 19 



richardsoni 13 



vulgaris iS, 20 



Myosotis laxa 37 



N 



Nasturtium armoracia 31 



sylvestre 31 



Neogale 6 



Neosorex 5° 



Neotoma baileyi i35 



pennsylvanica 96 



o 



CEuothera pumila 34 



sinuata 34 



Ophioglossum vulgatum 43 



Orobanche minor 37 



Oxyria digyna 107 



P 



Palmer, T. .S. : Rabbit drives in the West... vi 



Panicuni capillare var. minima 42 



commutatuni 42 



lanuginosum 43 



microcarpon 42 



nitidum 43 



proliferum 42 



pube.scens 43 



ramulosum 42 



Page 



Panicuni scoparium 42 



sphserocarpon 42 



viscidum 42 



Papaver dubium 31, 106 



nudicaule 106 



Pastinaca sativa 34 



Pentstemon Isevigatus 37 



attwateri 136, 137 



Peromyscus aureolus 120, 122 



Peromysciis belliis 137 



canadensis 49 



Peromyscus canadensis abietoruiii.. 49-50 



floridanus 122 



gossypinus 119-125 



gossypinus mississippiensis 123-124 



Peromyscus gossypinus iiigricu- 



lus 124-125 



gossypluns palmarius 124 



leucopus 96, 120, 122 



mearnsi 122 



niveiventris 121 



rowleyi i37 



Phacelia covillei 36 



parviflora 37 



Phalaris arundinacea 42 



canariensis 42 



Phaseolus perennis 34 



Phenacomys 46 



Phlox paniculata 36 



Physalis philadelphica 37 



pubescens 37 



Pieters, Adrian J. : Influence of fruit-bear- 

 ing on mechanical tissue of twigs viii 



Pirns coronaria 34 



Plantago patagonica var. aristata 3S 



Plover, New, from Madagascar 53-54 



Poa flexuosa 42 



sylvestris 42 



Pogonia ophioglossoides 38 



verticillata 38 



Pollard, Charles I^ouis : Further remarks 

 on Britton and Brown's illustrated 

 flora xii 



Iresine paniculata, an addition to 



the flora of Washington xi 



Observations on flora of District of 



Columbia viii 



Purple-flowered, stemless violets of 



Atlantic coast 85-92 



Polygala 86 



ambigua .^3 



curtisii var. pychnostachya 33 



incarnata 33 



verticillata 30, 33 



Polygonum muhlenbergii 38 



bistorta 105 



tenue io, 38 



viviparum 105 



Potentilla fragiformis 106 



maculata 106 



