The Scottish Natwalist. 301 



3. N. numismatis, Oliv., " silk-button gall," on leaves. 



{Hpath. vesicatrix, Schl., in leaves.) Abundant. 



4. N. laevitlSCTllus, Schenck, on leaves. 



(S. albipes, Schenck, on leaves.) Common in Clyde district. 



5. N. aprilinus, Gir., in buds. Rare in May, Cadder. 



6. Dryophanta folii L., on leaves. Local, chiefly in South 



Scotland. 



7. D. divisa, Htg., on leaves. Common. 



8. D. longiventris, Htg., on leaves, never showing red rings. 



Common, but local. 



9. Biorhiza aptera, Fab., on roots. 



{Dryoteras terminalis, Fab., " oak apples," on branches.) 

 Common, but local. 



10. Trigonaspis megaptera, Panz., on trunks. 

 {Biorhiza renum, Gir., on leaves.) Common. 



11. Andricus gemmae L., ; ' Artichoke gall," on branches. 



(A. fiilosus, Adler, on catkins.) Common. 



12. A. inflator, Htg., in terminal buds. 



(A. globuli, Htg., in buds.) Local, but wide-spread. 



13. A. radicis, Fab., on roots and stems. 



{A. noduli, Htg., in twigs.) Common in Clyde district. 



14. A. testaceipes, Htg., swelling of mid-rib. 



(A. Sieboldii, Htg., on young branches, under earth or vegeta- 

 tion.) Local, not uncommon. 



15. A. COrticis, Htg., in bark of roots, or of wounds in trunks. 



(A. gemmatus, Adler, in buds.) Local, but wide-spread. 



16. A. collaris, Htg., in buds. 



(A. curvaior, Htg., in mid-ribs or twigs.) Abundant. 



17. A. ramuli L., "cotton gall," on catkins. 



(A. aidwnnalis, Htg., in buds.) Local all over Scotland. 



18. A. cirratus, Adler, on catkins. 



(A. callidoj?ia, Mayr, in buds, stalked.) Apparently rare. 



19. A. Malpighii, Adler, in buds. 



(A. nudus, Adler, on catkins.) Rare, in Clyde district. 



20. A. amenti, Gir., on catkins. Rare, Ballater. 



21. A. OStreus, Gir., on leaves. Common (perhaps is agamic 



form of N. aprili?ius.) 



22. A. seminationis, Adler, on leaf margins. Rare, at 



Cadder. 



23. A. albopunctata, Schl., in buds. Common. 



