628 RUBBER 



Anthribiidae figure in our list, on the strength of an 

 undetermined species of this family found damaging Para 

 wood in the Malay States. 



The Curculionidae (weevils) are all phytophagous, many 

 of them being notorious as defoliators of various trees, 

 while others are injurious in their larval stages as borers 

 in the stems of plants. I have no records of Curculionid 

 attack on rubber in Ceylon; but Astycus chrysochloris 

 a handsome golden-green weevil and Hypomeces 

 squamosus a dull black species are credited with injury 

 to Hevea in Malaya. The same Hypomeces, in company 

 with D erodes curtus and a species of Phytoscapha, is 

 accused of similar haBits in Java; while in the Belgian 

 Congo these species are replaced by Ischnotrachelus 

 humeralis, Blosyrus seminitidus, and species of Isaniris 

 and Piezotrachelus. Should these leaf-eating beetles 

 become really troublesome, spraying with Paris green or 

 lead chromate would afford relief. 



Bostrichidae and Scolytidae, though belonging to distinct 

 families, may be conveniently discussed together, as they 

 are of very similar habits and appearance, and are lumped 

 together under the popular term " shot-hole borers." 

 The following species have been recorded as associated 

 with Hevea : 



Xylopertha mutilata: Boring in dead stems. (Ceylon, 

 F.M.S.) 



Xyleborus affinis. (Cameroons, Hawaii, Java.) 

 ,, ambasius. (Cameroons.) 



,, camerunus. (Cameroons.) 



cognatus, in seedlings. (Ceylon, Tonkin, 



Cameroons.) 



,, confusus. (Cameroons.) 



,, discolor, in stems of young plants and in 



dead leaf-stalks. (Ceylon.) 

 ,, interjectus, under blisters of renewed bark. 



(Ceylon.) 



,, morigerus. (Ceylon.) 

 ,, obliquicauda. (Ceylon.) 



,, parvulus. (F.M.S.) 



,, perforans, in dead and diseased stems. 

 (Ceylon.) 



