VIII 



DISEASES AND ENEMIES 



271 



Thus Xyleborus, called " bubuk " 

 times dangerous to trees attacked 

 bore into the diseased tissues, and from 

 there into the adjoining parts, and may 

 be the direct cause of the death of the 

 tree. 



The larva of a Bombycid moth of 

 the group of the Cossidae (Zeuzera 

 cojfeae, Nietner) is comparatively 

 common in Java 1 and is now and 

 then the cause of serious ravages (Fig. 

 92). The caterpillars are 4 to 5 cm. long 

 (1'6 to 2 in.), reddish yellow in colour, 

 with a few short bristles on each seg- 

 ment ; on the back of each 

 four little black spots are visible. 



They live in branches and twigs of 



in Java, is 

 by canker. 



segment 



some- 

 They 



w 



FIG. 92. The Zeuzera borer (Zeuzera 



a, Male ; b, female (after Roepke) (natural size). 



c, A twig of kola, in which the borer has lived, split longitudinally to show the tunnel. The 

 skin of the pupa, from which the moth has issued, protrudes from the opening (drawing by 

 Kades, supplied by Dr. Roepke). 



1 Kamerling und Zehntner, "Voorloopig overzicht, etc. " (De indische Natuur, 

 Jaargang 1900, p. 56. 



