SCANSORES. 



147 



Distance between nasal grooves [ Dryocopus. 

 at nostrils one third the width J 

 ofbiU. ( 



Reversed toe shortest 



Second primary at least 10 % 

 longer than longest tail-feather. 



Reversed toe longest. Distance 

 between nasal grooves at nos- 

 trils more than one half the 

 width of biU 



Thriponax. 

 Geci'nus . . 

 lyngipicus. 

 IHcus. 



I Angle of mandible halfway be- 

 I tween nostrils and tip of bill. 



First primary less than one third 

 of second. 



The only clue we possess to enable us to form an opinion of the 

 relative value of these characters is their constancy at diflferent ages. 

 The characters at the left appear to be as much developed in the 

 young as in the adult, whilst those on the right vary considerably 

 with age. It would be very easy still further to multiply the sub- 

 genera, by the use of equally important characters ; but the interests 

 of science will probably be best served by restricting the genera in 

 the following manner : — 



Oecinus. 



Distance between nasal groove at (lyngipicus. 

 nostrils at least one third the 

 width of biU. Angle of man- < 

 dible about halfway between 

 eye and tip of bill [JPicus. 



f Second primary at least 10 % 

 longer than longest tail-feather. 



129. GECINUS AWOKERA. 

 (JAPANESE GREEN WOODPECKER.) 



Pieus awohera, Temminck, Planches Colorizes, no. 585 (1836). 



The Japanese Green Woodpecker may be easily distinguished 

 from the Grey-headed Green Woodpecker by the red patch on the 

 black malar stripe, which is also found in the male of G. viridis. 



Figures : Temminck and Schlegel, Fauna Japonica, Aves, pi. 36 

 (male and female) . 



The Japanese Green Woodpecker is peculiar to Japan. It is not 

 found in Yezzo, where its place is taken by the Grey-headed Green 

 Woodpecker, but it is a resident in all the southern islands. There 

 are examples in the Paris Museum procured in the north of Hondo 



l2 



