INDEX OF ILLUSTRATIONS 
PLATE 
BTA CI GE PONCE. eit occ aniaeies tak bs ucass eaten seaeuawieadeess: 4 
Chonidrorhyncha Stenioides ....ccccccccccccccccceccccucccuseccuceens 7 
Cybedbus QrANAIS  ...ccccc cece ccccccccccccccccccccececccecccceccescaceees 3 
Cyclopocon OVGUPONUM ciiccccicasevscicnscssssssesotsisecasdeceseess 3 
PE CARINES FOVINOSUS  céiccsiaiinesxcurinnceiinesenieariernenidarvateds 2 
FUCHS RNTDIC cevcslavessescscsncesseevasexiadeanccacduessadaseaese: ps 
Eliroplectris PQUCULOLG vicisiciccacacsesevs vndescvncesvssssecvansensess 5 
Epidendritnt trOpidiOideS is cciivsivacsascinscavssacsenssavecersrereres 6 
Erythroxylon Coca and novogranatense, 
microsporocytes and root tip cells of ...................000es 17 
Euphorbia lancifolia (xbut) ........cc cece cece cee eceeeeeeeeueees 29 
EPOWIR IE TX PUL LOW. <censceensraxcchdacscucteniubusdadnasieanaxvncds 34 
POTS! TET 4 x covesriusewinseastcsiakas chase erasels 24 ,27,30,31 
Be rac ede eo ea rc eee dieneenneens 25 
Leaves showing preparation of tea ..................0.08. CAB 
Map of Guatemala and adjacent countries 
SHOWING FANGe OF IXOUL, csi sciides ca vidiasenuesvecicdseoenee 28 
oN 111) ce oe ee eae eR ra nats wey Tey nen eee eee eee rere 26 
Young mother nursing baby after having 
CARON POU CED. yc tencreercrcisanavcisaniacacent seein) 
FIGRGIGKCHIS LINGIOVQMUS iasse ccvcuscdvidetcnainscddaaniaiest aes 4 
Jessenia Bataua, near Manaus, Brazil .................6..0.0 66 20 
PUSTLCIG DOCTOVOIIS: oc.0ciewckxca cd rervexendbisvevianatensdeinbevaeexs 21 
Justicia pectoralis var. stenOphylla ciccccccccccccccccccccceeeees 22 
Kunth’s report of the source of the snuff, 
UR, 2 cere tsa eres eda acisedcatey sens ee eee 38 
MASAOVAING BOMOU xdcsiecticedascancrkritakehVidedsedstnsesiveieters 10 
MGSACVAING CHOME secstccerctpitrnucasntsisewsnsetinsetiveesnannt 8,10 
MGASAEVQIIAIADGNG: jrceisararacivecersxisuteersseraisisiansixesauors 9 
Masdevallia kypNonantha .....cccc cece cc ccc cen nc ccc enneeenneees 8,12 
Masdevaliia: LARSDOCVOU. cic cecaxcvesavatesecatanteexicsabsestotases 1] 
Masdevallia pSeudOMinuta ......cccccc cece cece nc eneeeneseeneees 8,12 
WEAN OVOIE EO TIIOON: occa ccsecadev iia tts cect reguaes eases 10 
Masdevallia veneZzueland .......cccceccccceccecsccccccccccesseceess 13 
NECHAOHOTA GSD cic wcankitatcucriwedveunktsceneiwaxaeeswiesewedion 23 
OnCiGIUIN BIGDUN PONE: oi sisaxcncicedaninucsdeencisecccvavncisienees 16 
CPHCUGIONR TIOPHGE, osc ccc asta cacevdcietuns axvssinweeeatinedencewes 15.16 
Vii 
