Variation and Natural Selection. 91 



exactly resembling a little red flower which grows in the 

 sand. Insects, attracted by what they believe to be flowers, 

 approach the mouth of the lizard, and are, of course, 

 captured."* The fishing frog, or angler-fish, is possessed 

 of filaments which allure small fry, who think them 

 worms, into the neighbourhood of the great mouth in 

 which they are speedily engulfed ; and certain deep-sea 



Fig. 20. Mimicry of bees by flies. 



a, 6, Bombus muscorum ; c, d, Tolucella bombylans ; e, Eristalis tenax ; f, Apis mellifica. 

 The underwings of the hive bee (/) were invisible' the photograph from which the figure was 

 drawn. (From an exhibit in the British Natural History Museum.) 



forms discovered during the Challenger expedition have the 

 lure illumined by phosphorescent light. 



We need say no more in illustration of the resem- 

 blances which have enabled certain organisms to escape 

 elimination by competition. Once more, be it understood 



* " Colours of Animals," p. 73. 



