:hai'. VI] 



Of the tliice last-mentioned cases, that of Triplaris americaiia, a 

 lolygonaccous plant belonging to equatorial South America, and of allied 

 pecies of the same genus, is the simplest. Hollow axes are frequent 

 (1 the family. The dwelling, here, as in Cecropia, is by no means an 

 daptation to ants. On 'the other hand, the entrance-aperture may safely 

 )e described as such. I'ood-bodies, resembling those of Cecropia and 



ANIMALS 



147 



Fig. S3. Myrmecophytes. i. Ficus inaequalis. From the botanic garden, Singapore. 2. On 

 - left : Triplaris americana. Young internodes. From the Buitenzorg botanic garden. On the 

 ;bt : T. caracasana. Old intemode. Caracas. 3. Humboldtia laurifolia. From the Buitenzorg 

 tanic garden. All natural size. Drawn by R. Anheisser. 



cacia cornigera, are wanting, but extra-floral nectaries occur on the 

 aves. Such extra-floral sugar-secreting glands, quite apart from the 

 nvers and without oecological connexion with pollination^ occur very 

 •mmonly in plants inhabited by ants. 



In Ficus inaequalis, with which may be included a number of plants 

 ithentically inhabited by ants, for example species of Duroia, not only 

 e opening but apparently also the hollow chamber has arisen as an 

 laptation, for the latter is present on some onl)- of the internodes 



L 2 



