T3lossoni Hosts and Insect Guests 



shed their pollen at the threshold. The third 



morning, or perhaps even sooner, the other pair 



come forward, and we see the 



opening of the blossom as at C. 



Blossoms in all these three 



conditions are to be found on 



this cluster. 



A small wasp is now seen 

 hovering about the flowers, 

 and we must turn our atten- 

 tion to him as seen in Figs, i, 2 

 The insect alights, we will assume, on 

 a blossom of the second day. Fig. i, 

 clinging with all his feet, and thrust- 

 ing his tongue into the beads of nectar shown at A' 

 id B'. He now brings his breast 

 : thorax, or perhaps the underside 

 of his head, against the 



Fig. 



pollen, and is thorough- 

 ly dusted with it. Leav- 

 ing the blossom, we see 

 him in flight, as at Fig. 2, 

 and very soon he is seen 

 to come to a freshly opened flower, 

 ^' which he sips as before. The pollen 



is thus pushed against the projecting stigma, as 



82 



