4 - 



of the Indian Archipelago describes not less than fourteen varieties r 

 six of which occur in Java. Ail of thèse may occasionally be 

 found upon cotton-plants (and other shrubs and trees of the natural 

 family Maloaceae) but the most common one is the testacaous fornu 

 The eggs are deposited in groups around the young twigs, 

 each group containing froni one hundied to two hundred eggs. 

 The small larvae after hatching continue for some time on the 

 same twig, piercing with their probosces into the green tissue 

 and finally killing it. 



7. Dysdercus cingulatus, Fabr. This bug, which also is very 

 common, attacks the immature seeds contained in the boll. 



8. Chrysomelid beetles, belonging to the gênera Chalco/ampra, 

 Mysothra, Monolepta e.a. are often found feeding upon the leaves, 

 but generally they are not considère»! to do much harm. 



9. Ergolis ariadne, L. The caterpillars of tins buttertly 

 were received from Demak in the Residency Semarang and re- 

 portée! to occur in great numbers on the cotton-leaves. As the 

 ordinary foodplant of thèse insects is the „djarak" {Ricimts com- 

 munis, L.) which is much cultivated by the natives in that 

 country, it is very probable that after the harvest they removed 

 from the Ricimts to the cotton. 



III. UNCAR1A GAMB1R. 



1. Pycanum rubens, L. This big, reddish brown and more 

 or less gold-shining bug was reported from Indragiri (East coast 

 of Sumatra) as killing the tops of young twigs. In doing so, 

 they proceed in the same way as e.g. several species of Dalpada 

 do when attacking the coffee-tree, i.e. by provoking, in consé- 

 quence of the irritation which is caused by the introduction of 

 the proboseis into the bark, an abnormal affluence of feeding-sap, 

 afterwards followed by fading and blackening of the leaves and 

 finally by the death of the whole twig. The eggs of this bug- 

 are green, semi-transparent and oval-shaped. Their greatest length 

 is 3,5 mM. 



