DOCTERS VAN Leeuwen : GaLls of Krakataii and Sebesy. 303 



of the gall is densely covered with white hairs, giving it an almost velvetlike 

 appearance. Inside there is a small larval chamber, which is in open 

 communication with tlie air by 

 a short but wide canal. The 

 wall of this canal is covered 

 with long white hairs. On the 

 uppersurface of the leaf only 

 a slight swelling of a dark 

 green colour betrays the pré- 

 sence of the gall. See accom- 

 panying figure 12. 



Sebesy, in a grass-jungle, 

 April 2Qth 1921, No. 5432. 



Literatiire: D. v. L. VII.N. 460 

 figure 213, 



43. Mangifera in- 



by a 



No 

 dica L. 



A leaf-gall caused 

 gall-midge. 



The leaves are strewn with 

 tiny excrescences developed 

 partly on the upper-, partly on 

 the undersurface of the leaf, 

 about ^/4 mM. high and 1 mM. 

 broad. On the uppersurface 

 of the leaf the gall is cylindrical 

 or more or less truncated 

 conical. On the undersurface 

 the gall is rounded or conical. ^'S- 12, 

 hiside there is a very small 

 larval chamber. A common gall in thèse countries. 



Sebesy, January 26th. 1922. No. 6161. 



Literature: D. v. L. Java II. No. 66. 



No. 44. Mangifera indica L. 



A leaf-gall caused by a gall-midge. 



A tiny excrescence only developed on the uppersurface of the leaf. 

 They are cylindrical outgrowths, about 1 mM. high, ■''/4 mM. across. 

 The surface is glossy and dark brown. Inside there is a tiny larval 

 cavity. 



Sebesy, Native village, January 26th. 1922. No. 6164. 



A midge-gall on Mallotus ricinoides 

 M. ARG, XI. 



Literature: U. v. L. Java VIII. No. 462. fig. 214. 



