38 Mr. J. S. Baly on new Genera 
Thus the young bird exhibits a far greater amount of vivid 
red colour than the adult, and, besides, a different mode of 
distribution: it has the under surface of the body for the 
greater part red and the thighs black, whereas in the mature 
bird the under surface is black and the thighs red. This is, 
at all events, anoteworthy fact; yet it is not quite exceptional 
among’ birds. 
In the young of Tanygnathus luzonensis the head is green 
like the greater part of the plumage, and the rump is light 
blue; in the adult the upper part of the head is light blwe and 
the rump green (Briiggemann, Abh. Ver. Brem. v. p. 38). 
The immature Lorius histrio has the whole crown of the 
head blue and the fore back crimson; the old bird has the 
head almost entirely crimson and the back blue (Briigg. J. ¢. 
. 41). 
i In Nectarinia flavostriata the wings and tail of the young 
bird (the general plumage of which is olive-coloured) are red ; 
those of the adult are blackish brown, and the remainder of 
its plumage is red (Briigg. /. c. p. 74). 
To add an example of a common indigenous bird, we find 
that in the young bird of the spotted woodpecker (Picus 
major) the crown of the head is crimson, and the upper sur- 
face of the body partly marked with white, where the adult 
is of a uniform black. 
These extraordinary instances of the young birds showing 
ornamental colours in parts of the body which are plain- 
coloured in the adults can only be explained by the sugges- 
tion that the immature plumage gives a recapitulation of 
the colours possessed by the ancestors of the species. Thus 
the young Picus major shows a stronger resemblance to the 
other European species (P. leuconotus, P. Lilfordii, P. medius) 
than the adult does; or, in other words, it has kept more 
strictly the colours of the common parent of the group. 
I am of opinion that many more instances of such conser- 
vative ornamental plumages in the young birds can be found 
if they are searched for. 

V.—Characters of new Genera and of some undescribed Species 
of Phytophagous Beetles. By Joseru 8. Baty, F.L.S. 
[Continued from ser. 4. vol. xx. p. 386.] 
Fam. Chrysomelide. 
Chrysomela Jacobyt. 
C. oblongo-ovata, convexa, nigra, nitida, capite thoraceque minute 
