374 
COLEOPTERA. 
With the Callichromini , we leave the dull brown species and come 
to metallic blue and green species of larger size and more slender build. 
Chloridolum alcmene , Thoms., 
is the species found boring in 
the trunks of orange trees in 
Coorg (see Agri. Journ., India, 
Vol. I, p. 129). It is a deep 
blue insect, the legs dark 
coloured ; it is recorded also 
from Assam, Andaman Isles, 
and Burmah, while Mr. 
Andrewes found it in the 
Nilgiris. No other species is 
notable and none occur in the 
cultivated plains ; some are 
known to emit an odour which 
is pleasant and possibly con¬ 
nected with sex. 
Fig. 253.—Chloridolum alcmene. 
Xylotrechu has the antennae wide 
apart and the front with ridges ; it 
includes the White Borer of Coffee, 
X. quadripes, Chevr., whose larva 
lives in the stems of the coffee plants. 
Much has been written about this pest 
which occurs in the coffee districts 
of South India and is most destructive 
to coffee grown under too dense shade. 
It is found also in Assam, Sylhet and 
Burmah and is an example of an ordi¬ 
nary indigenous insect which finds 
abundance of a cultivated plant in 
which it can breed and thus becomes 
The Clytini include a large 
number of hill forms, chiefly 
slender insects with a cylindri¬ 
cal or globose prothorax and 
marked in bright colours. 
Fig. 254 .—Xylotrechu s quadripes. 
The White Borer oe Coffee. 
