66 Observations on Cynipidae, 



this undescribed species with SpatJiegastcr Taschenbergi. 

 In 1876 (when I did not know the connexion that ex- 

 isted between the last two species) I obtained, from an 

 experiment I then made, galls of Dryophanta longiventris 

 upon leaves which I believed had only been pricked by 

 Spathegaster Taschenbergi. Among the collected Spathe- 

 gaster Taschenbergi galls I ought to have observed that 

 there were some of which the colouring was different ; 

 these resembled the galls which I now obtained from 

 my experimental breeding with Dryophanta longiventris. 

 This gall, which I am now about to describe, is that 

 of Spathegaster similis. 



[The striped gall is found in July on Quercus pedmiculata. When 

 attacked by inquilines it often remains very small. 



Inquilines. Synergns pallicornis and S. apicalis. 



Parasites. Syntomaspis cyanea, S. lazulina, Torymus abdotninalis 

 and T. regius, Calliynome lofigiventris, Elachestus cyniphidiunt.^ 



15^ Spathegaster similis. n. sp.* 



Gall. About 2 mm. long ; like Spathegaster Taschen- 

 bergi but more slender and pointed ; of greenish grey 

 colour and with a velvety rind. The colour is caused 

 by a peripheral layer of cells containing a greenish 

 pigment, but this tint is rendered dull by a covering of 

 long white hairs, imparting to it a grey tone. It 

 is especially the stronger and longer pubescence which 

 is the important distinction between this and the 

 Spathegaster Taschenbergi gall. (Fig. 15 ^.)- 



These galls are found almost exclusively on the 

 adventitious buds at the base of old oaks ; but it may 



^ So called on account of its close resemblance to the Spathegaster 

 Taschenbergi gall. 



