The Making of Species 



that the pattern changes, and the direction of the 

 lines, or spots, at the head, neck, and every joint 

 of the limbs ; and, lastly, that the tips of the ears, 

 nose, tail, and feet, and the eyes are emphasised 

 in colour." 



More recently Mr J. Lewis Bonhote has 

 devoted much attention to this important subject. 

 The results of his researches are summarised on 

 page 185 of vol. xxix. of the Proceedings of the 

 Linncean Society, and on page 258 of the Proceed- 

 ings of the Fourth International Ornithological 

 Congress, 1905. Mr Bonhote states that the 

 presence or absence of colour tends almost in- 

 variably to make its appearance, first of all, on 

 certain definite tracts, common to mammals and 

 birds alike, which he calls pcecilomeres. 



" Pcecilomeres," he writes, " are situated on 

 the following parts, viz., chin, malar stripe, max- 

 illary stripe, a spot above and slightly in front of 

 the eye, a spot below or slightly behind the eye, 

 the ear, crown of the head, occiput, fore-end of 

 sternum, vent, rump, thighs, wrist, shoulders 

 (above and below). 



" Now, there is hardly any species of bird on 

 which one or more of these poecilomeres is not 

 ' picked out ' (to use a painter's expression) in 

 some colour different from that of the surround- 

 ing parts, and, in fact, most of the so-called 

 recognition or protective markings will be found 

 on these patches. 



288 



