DOCTERS VAN LhEUWEN : Galls of Krakataii and Sebesy. 291 



either distorted or lost. Below follows the correction of the most disturbing 

 errors. 



p. 58, 1. 8 from top, "this is after ail no matter", read : "this is after ail no 



matter for surprise", 

 p. 60, 1. 8 from top: "the gall-mites may be carried by other insects or 



by winds", — this should be: "the gall-mites may be carried by 



insects or by winds". 

 p. 60, 1. 12. from top: "there remains then the distribution of the insects 



by the wind". Insects must be mites! 

 p. 61, 1. 20 from top "distribution of the insects by the wind", ought to be: 



"of the mites by the wind". 

 p. 62, 1. 9 from top: "the study of the Krakatau galls does not confirm 



thèse hypothèses", must be: "has sapped the basis of thèse 



hypothèses", 

 p. 62,1.15 from bottom : "On the contrary 1 found", drop, "on the con- 



trary". 

 p. 64, 1. 13 from top: "a leafbud and stem-gall", read "a leaf- bud- and 



stem-gall". 



As regards the literature I hâve usually cited only the most récent 

 article where the gall in question was discussed. In the place quoted the 

 further literature is usually found. 



Description of the galls coUected» ') 



No. 1. Àlstonia scholaris R. BR. 



A leaf-gall caused by a psyllida : Paiiropsylla tuberculata Crawford. 

 The gall is developed on the upper- and on the undersurface of the leaf. 

 On the upperside the gall is half globular and about 2'/2 rn^- across; on 

 the underside it is conical with a blunt apex. In the top there is a narrow 

 opening corresponding through a canal with the larval cavity. The gall is 



') The literature cited under the descriptions of the galls is : 

 D. V. L. I: J. und W. DocTERS van Leeuwen. Einige Gallen aus Java. Beitrag I, Mar- 



cellia. Vol. VllI. 1909. p. 21. 

 D.v. L. II: Idem. Beitrag 11. Alarcellia. Vol. Vlil, 1909. p. 83. 

 D. V. L. 111: Idem. Beitrag III. Marcellia. Vol. IX. 1910. p. 37. 

 D. V. L. IV: Idem. Marcellia. Vol. IX. 1910. p. 168. 

 D.v. L. V: Idem. Marcellia. Vol. X. 19II, p. 65. 



D. V. L. VI: Idem. Bulletin du jardin Botanique de Buitenzorg. Série II. No. III. 1922. p. I. 

 D. V. L. VII: Idem. Bulletin etc. Série II. N. XV. 1914. p. 1. 

 D.v. L. VIII : Idem. Beitrag VIII. Bulletin etc. Série III. Vol. I. 1918. p. 17. 

 D. V. L. Sumatra: Idem. Beschreibungen von Gallen aus Sumatra und Simaloer. Bulletin, 



etc. Série II. N. XXI. 1916. p. 3. 

 D. v.L. Celebes : Idem. Beschreibungen von Gallen aus Celebes und aus den Insein 



siidlich von Celebes. Bulletin etc. Série 11. N. XXI. 1916. p. 21. 

 D.v. L. Krakatau: Idem. The Galls of Krakatau and Verlaten Eiiand. Annales du Jardin 



Botanique de Buitenzorg. Vol. XXXI, 1920. p. 57. 



