BIRD-POLLINATED PLANTS 73 
Garden, makes a communication regarding the pollination by bats of an indigenous 
species, Bauhinia megalandra (sp. nov.). The tree has a height of about 10 metres. 
Its long white flowers bloom in the evening hours, from about four to six o'clock. 
(Darkness sets in about six o’clock at the season when this plant is in flower 
(January) in Trinidad.) About half an hour previously bats of various species 
may be observed flying with great rapidity from flower to flower, and it can be 
observed that their visits are immediately followed by the fall of the white petals 
to the ground. If the tree is examined next morning, not a single complete flower 
will be found, all of them being more or less torn, and robbed of their long white 
petals and stamens. When a bat settles on a flower, it holds fast by the projecting 
stamens, apparently seizing the erect recurved petals, for these are completely 
scratched or broken to pieces, or else torn off. The stamens are often broken 
off short at their bases, but the stigma seems to be seldom injured. 
There does not appear to be any secretion of nectar, and it is therefore probable 
that the bats visit the flowers for the sake of such insects as are attracted by the 
odour of the flowers. In order to capture these insects, the bats occupy such 
a position in the flowers that they effect pollination. 
Mr. J. H. Hart supplements these observations in a letter to me, pointing out 
that the flowers of yet another tree, Eperua falcata (‘ Wallaba’) are visited by bats. 
Glossonycteris Geoffroyi Gray, a species in which the brush-like tongue resembles 
that of a humming-bird, was captured on the flowers of Eperua in the Botanic 
Gardens at Trinidad. Its behaviour when visiting the flowers is so like that of 
moths, that at first it was taken for one of them. ‘There can be no doubt that 
it pollinates the flowers of this tree (cf. P. Knuth, ‘Neue Beobachtungen iiber 
fledermausbliitige Pflanzen,’ Bot. Centralbl., Cassel, Ixxii, 1897). 
(2) Plants with Bird-pollinated Flowers, Ornithophilae (O)'. 
Plants in which the flowers are pollinated by birds (humming-birds, honey- 
suckers, rarely sparrows) are found in the tropics. 
The first observations on the regular visits of birds to flowers in tropical 
America belong to the first half of the eighteenth century. The descriptions 
and illustrations ascribed by Kronfeld (Bot. Centralbl., 1, 1892, pp. 290-4) to the 
gardener Franz Boos, are taken, according to Loesener (Bot. Centralbl., li, 1892, 
pp. 138, 139), from a work by Catesby (‘ Natural History of Carolina, Florida, and 
the Bahama Islands,’ 1731). 
About’ a century and a half elapsed before another and larger work gave 
a thorough account of the visits of humming-birds to flowers. In his celebrated 
book, ‘The Naturalist in Nicaragua’ (London, 1874), Thomas Belt cites the 
pollination of Marcgravia nepenthoides by humming-birds as a notable example. 
This is a climbing plant that ascends to a great height, and possesses pendulous, 
long-stalked flowers arranged in a circle. A prolongation of the axis of the 
1 After the completion of this part of the manuscript I received a work by my botanical friend 
Professor E. Loew, ‘Uber ornithophile Pflanzen’ (from ‘ Festschrift zum 150jahrigen Bestehen des 
K6nigl. Realgymnasiums zu Berlin,’ 1897). In this work the material involved is treated in an 
exhaustive manner. 
