Chap. VII. CATASETUM TRIDENTATUM. 205 



have resembled the males of G. saccatum and callosumf 

 for as we have just seen, it is to these two plants that 

 Myanthus presents so many striking resemblances.* 



Lastly I may be permitted to add that Dr. Criiger, 

 after having carefully observed these three forms in 

 Trinidad, fully admits the truth of my conclusion that 

 Catasefum tridentatum is the male and Monaclianthus 

 viridis the female of the same species. He further 

 confirms my prediction that insects are attracted to 

 the flowers for the sake of gnawing the labellum, and 

 that they carry the pollen-masses from the male to the 

 female plant. He says " the male flower emits a 

 peculiar smell about twenty -four hours after opening, 

 and the antennce assume their greatest irritability at 

 the same time. A large humble-bee, noisy and quarrel- 

 some, is now attracted to the flowers by the smell, 

 and a great number of them may be seen every morning 

 for a few hours disputing with each other for a place in 

 the interior of the labellum, for the purpose of gnawing 

 off the cellular tissue on the side opposite to the column, 

 so that they turn their backs to the latter. As soon as 

 they touch the upper antenna of the male flower, the 

 pollen-mass, with its disc and gland, is fixed on their 

 back, and they arc often seen flying about with this 

 peculiar-looking ornament on them. I have never 

 seen it attached except to the very middle of the 



♦ The male of ihe Indian ante- to reversion to a former state of 



\G^Ki(^A.bezoartica after castration the sptcies; for we have good 



produced horns of a widely dit- rea>oa to believe that any cause 



ferent shape from those of the which disturbs the constitution 



perfect male; find larger and leads to reversion. Myautlius, 



thicker than those occasionally though having- the organs of both 



produced by the female. We see sexes apparently perfect, is sterde; 



something of the sanie kind in the it has ti erelbre had its sexual 



horns of the common ox. I have constitution disturbed, and this 



remarked in my ' Descent of ]Man ' seems to have cause d it to revert 



(2nd edit. p. 50(j), that such in character to a former state, 

 cases may probably be attributed 



