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Introduction to Botany. 



known as the Pronuba moth, is seen to mount a stamen, 

 scrape together the sticky pollen, and pack it against the 

 under side of its head by means of a spinous structure 

 known as the maxillary tentacle, which seems to have been 

 specially developed for this purpose, for in other moths it 



FIG. 115. 

 Yuccas in the twilight. Drawn from a photograph. 



is a mere vestige. In gathering the pollen it hooks its 

 tongue over the end of the stamen, evidently to secure a 

 better hold (see Fig. 116). Having become well loaded 

 with pollen, as shown in the photomicrograph of the moth's 

 head (Fig. 117), it descends the stamen and flies to another 

 flower. There it places itself on the pistil between two of 



