Aphilotrix albopundata. 93 



of the male catkins only. The galls are however 

 occasionally found on the leaves, and I thought that 

 I might be successful in getting the fly to produce leaf- 

 galls, but as yet I have only been able to make one 

 experiment, and that gave no result. If it should be 

 proved that Aphilotrix quadrilineata can produce its galls 

 as well on leaves as on flowering catkins, this species 

 ought certainly to be united with Aphilotrix marginalis. 

 I have repeatedly watched the fly in the open air 

 pricking the flower buds, and I saw it do so on April 

 13, 1878. The fly is in the habit of concealing itself 

 as much as possible in the daytime, and pricks the 

 buds towards evening. I marked several buds which 

 were pricked before my eyes, and in May I could 

 affirm that Aphilotrix quadrilineata galls had been 

 formed, on catkins growing from all these buds. 



[The furrowed catkin gall is found in May on Qiiercus sessiliflora. 

 Inquiline. Synergns facialis. 



Parasites. Torymus auratus and Olinx trilitieata. The gall is 

 very various in form, as the large number of synonyms indicates.] 



23. Aphilotrix albopunctata. Schltdl.^ 



Gall. A very dainty bud-gall, like a miniature 

 acorn ; 4-5 mm. long ; of a greenish yellow or brownish 

 colour, with pale spots ; the apex distinctly umbilicate. 

 The gall appears in the buds in the beginning of May, 

 becomes rapidly mature, and falls to the ground at the 

 end of May. (Fig. 23.) 



Bearing the Fly is easy and it emerges in the 



P Cynips majalis, Giraud. Cynips albopunctata, Schltdl. Andnciis 

 alboptmciaius, Mayr. Cameron considers the fly the same as A 

 quadrilineata.] 



