, ._ [December, 



14b 



their position is such as to induce a belief that each gall is a modified 

 flower-bud. In a dried state the galls are reddish-grey in colour. 

 They are of a long spindle-shape, slightly curved, with the apex much j 

 produced, the outer surface slightly rugose, and with faint longitudinal I 

 ribs. The length of the individual galls varies from 6 to 13 lines, and 

 the average diameter is about 1| line. When broken they are seen 

 to be quite hollow, with only thin walls, and they emit a pleasant 



aromatic resinous odour, similar to that of rosemary. Many of them 

 have a small circular opening (see the enlarged figures) a considerable 

 distance below the apex, whence an insect has escaped. 



I have broken open many galls from which an insect had not 

 escaped In some of these I find the shrivelled-up remains of a larva 

 (never more than one in a gall) that appears to be dipterous and no 

 doubt the true gall-maker, but in the majority there is the dned-up 

 pupa of a Hvmenopterous parasite with clavate antennae apparently 

 belonging to the group Pteromalini of the Chalcidid* In aU those 

 galls from which the insect has emerged, I find only the puparium of 

 this parasite I have not sacrificed every imperforated gall, but those 



