July, 1922] BAILEY — POLLINATION OF MARCGRAVIA 
Acknowledgments 
I am indebted to the Committee on Grants for Research of the American 
Association for the Advancement of Science for a grant of $500 which 
enabled me to undertake this and a number of other investigations. I wish 
to thank WilHam Beebe, Director of the Tropical Station of the New 
York Zoological Society, for the privilege of visiting the Kartabo Labora- 
tory, and for his constant endeavor to facilitate my investigations. Miss 
Anna H. Taylor, Dr. and Mrs. Alfred Emerson, and Mr. John Tee-Van 
very kindly contributed a number of observations, drawings, and photo- 
graphs which were much appreciated. My colleague, Professor B. L. 
Robinson, offered a number of helpful suggestions in phases of the problem 
relating to his specialty. 
LITERATURE CITED 
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Rettig, E. 1904. Ameisenpflanzen — Pflanzenameisen. Beih. Bot. Centralbl. 17 : 89-122. 
Schimper, A. F. W. 1888. Botanische Mittheilungen aus den Tropen I. Die Wechsel- 
l)eziehungen zwischen Pflanzen-Ameisen im tropischen Amerika. Pp. 59-92. Tena. 
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Szyszylowicz, I. von. 1895. Marcgraviaceae, in Engler and Prantl's "Die natiirlichen 
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DESCRIPTION OF PLATES 
Plate XXIII 
Fig. I. Marcgravia purpurea spec. nov. Foliage and immature inflorescences. 
Photograph by John Tee- Van. X 5/22. 
Fig. 2. M. cuyuniensis spec. nov. Section of leaf, showing outlet of hypophyllous 
gland. X 30- 
Fig. 3. M. purpurea. General habit of growth. Photograph by John Tee-Van. 
X 1/30. 
