336 Ridley . — On Bulbopkyllum macranthum . 
ovato-oblonga, apicibus rotundatis, sepalis (caudis exceptis) 
paidlo brevioribus, colore similia. Labellum multo brevius, 
angustum, lineare, carnosum, recurvum, subtus pubescens, 
flavum apice rubro punctatum, basi punctis rubris duabus. 
Columna brevis ; stelidiis brevibus obtusis, 
Singapore, on trees at Char chu Rang. 
EXPLANATION OF FIGURES IN PLATE XXII. a. 
Illustrating Mr. H. N. Ridley’s paper on the method of fertilization in 
Bulbopkyllum macranthum and allied Orchids. 
Fig. 1. B. macranthum. Whole plant very much reduced. 
Fig. 2. Flower slightly enlarged. 
Fig. 3. Lip and column from behind, enlarged. 
Fig. 4. Lip and column, side view. 
Fig. 5. Lip and column, with fly upon the lip. L. Lip; poll, pollinia ; p. foot 
of column ; S. stelidium. 
Fig. 6. Fly thrown into the arms of column. 
Fig. 7. B. striatellum mihi. Side view of flower much enlarged. Dorsal and 
one lateral sepal and one petal removed, with fly on the lip. 
Fig. 8. The same after fall of the lip. 
Fig. 9 . Head of fly with pollinia between the eyes. 
