THK ENTOMOLOGIST. l47 



Von Scblechlendal observes of this gall: — "It often 

 lia])pens that the galls of this species are distorted by 

 inqnilines before they are matured; in such cases they 

 hardly attain the size of a pin's-head." I have frequently 

 noticed these dwarfed specimens in the next species— 

 D. divisa. The controllers of D. longiventris are Synergus 

 ])allicornis, Syntomaspis cyanea, S. lazulina, Callimome 

 abdominalis, and C. regius ; also Elachestus Cyniphidum, 

 according to Ratzeburg; This species has been recorded as 

 British by Mr. IMilller (E. M. M, vii. 108), who met with it 

 rather sparingly in the neighbourhood of Norwood. — E. A, 

 Fitch. 



51. Dri)op]ia}ita divisa, Hart. — Like the preceding, the 

 gall of this species is also found on Quercus peduncnlata. It 

 is spherical, but distinctly flattened at the top and bottom, 

 so that it has in the centre a perpendicular diameter of five 

 millimetres, and an horizontal diameter of seven millimetres. 

 It adheres at one point to a side rib, rarely to the midrib, on 

 the under side of the leaf, and is not visible from the upper 

 side. Its surface is glossy, smooth, bare, brownish yellow, 

 and frequently red on the side which is exposed to the sun; 

 it has a few very flat, scattered papillae of a darker colour. 

 In section it exhibits a radiating, but not close, parenchyma, 

 and has a large larva-cell without an inner gall. It is 

 distinguished from the two previously-described species by 

 its smaller size, its flattened spherical shape, its shining 

 surface, and by the size of its larva-cell, which is very large 

 with respect to the size of the gall. Frequently there is a 

 tolerably well-defined flat papilla opposite the basal attach- 

 ment, which is a little darker than the surrounding colour. I 

 have not bred the fly as yet. — G. L. Mayr. 



There has been much uncertainty and confusion as to the 

 specific diff'erences in the galls of the three preceding species 

 of Dryophanta. This lias also been the case with this and 

 the following species. The distinctive marks of the latter 

 three are as follows : — The galls of Divisa are thick-walled, 

 those of Agama are thin-walled, whilst Disticha exhibits a 

 double cavity in section. Speaking of Agama, Von 

 Schlechtendal says that in some years it occurs in such great 

 numbers as to bend the twigs. With me Agama has occurred 

 sparingly ; and such I believe to be generally the case in 



