DOCTERS VAN Leeuwen : Some galls from Hongkong. 



271 



Java on Breynia raccnwsa Bl. Its gaiis are spindle-shaped swellings ofthe 

 twigs, about 60 mm. long and 5 mm. in diameter, and of a reddish-brown 

 colour. Inside there is a narrow chamber, tenanted by a Caterpillar of a 

 dirty green colour. See accompanying figure 6. 



Hongkong, in shady places, 8 Nov. 1920. No. 4919. 



New-Territory Sha-Tin, underbrush, 10 Nov. 1920. No. 4951. 



Literature: D, v. L. Java II. No. 25. 



No. 7. Bridelia tomentosa Bl. 



A bud-gall caused by a moth (prob.). 



The buds are extended into green fusiform, or onionlike galls. Average 



size about 6 mm. long and 3 mm. in diameter. 



Mostly swollen at their base and ending in a point. 



Inside there is a wide larval-chamber. AU the galls 



found by me were empty, but it is probable that 



the gallformer is a caterpillar. See the accompanying 



figure 7. 



New-Territory, Sha-Tin, underbrush, 10 Nov. 1920. 



No, 4945. 



Fig. 7. A moth-gall on 



Bridelia tomentosa Bl. 



nat. size. 



No. 8. Bridelia tomentosa BL. 



A leaf-gall caused by a psyllida. 



On the underside of the leaf thèse galls form 

 small conical outgrowths, situated mostly near the 

 main nerve; they are of a light-green colour. See 

 figure 8. The average size of thèse outgrow^ths is 

 1 mm. On the reverse side thèse galls are seen as 

 small rounded hardly visible swellings. The opening, 

 which gives entrance to the gallchamber is on the 

 underside of the gall. 



New-Territory, Sha-Tin, underbrush, 10 Nov. 

 1920. No. 4948. 



No. 9. Eugenia Millettiana Hemsl. (prob). 

 A stem-gall caused by a gallmidge. 



The endsof the twigs are swol- 

 len into irregular ballshaped or oval 



galls. They consist of the stem-apex, and sometimes rudiments 

 of the leaves are developed on the gall. Occasionally they can 

 develop in the axils of the leaves. Average size 3— 6 mm. in 

 diameter. Inside there is a watery tissue in the centre of which 

 are several small rounded larval-chambers. See figure 9. 

 Fig. 9. A midge- New-Territory, Sha-Tin, underbrush. 10 Nov. 1920 



gall on Eugenia jsJq. 4943. 



Millettiana Hemsl. , ., , r\ i i „ i\/ m^ i^n f.-rr An 



nat. size. Literature: D. v. L. Java IV. No. 169. ng. 09. 



Fig 8. Psyllid-galls 

 on Bridelia tomen- 

 tosa Bl. nat. size. 



