1188 INDEX BIBLIOGRAPHIQUE 



WEISSE A. 



i902 a . — Ueber die Blattstellun^ an einigen Triebspitzen- 

 Gallen. 



Jahrb^viss.Bot. J LeipzigX37 ( p.594-642,pl.XII,XIIIA,XIII B. 



WESTHOFF F. 



j883\ — Westfalische Phytoptocecidien. Ein Beitrag zur 

 Kenntniss der geographischen Verbreilung der Gall- 

 milben (Phytoptus Duj.) und ihrer Gallgebilde. 



Muenster,,Tahresber.Prov.Ver.Wiss.,p.49-6i. 



WESTWOOD J. O. 



i86Q a . — [Currant-bud Disease.] 



Gard.Chron.,London,p.i23o,fig. 



1882 a . — Description of the insects infesting the seeds of 

 Ficus Sycomorus and Carica. 



London,Trans.Ent.Soc.,p.47-6o,pl.H-V. 



1882 b . — On the supposed abnormal habits of certain species 

 of Eurytomides, a group of the Hymenopterous Family 

 Ghalcididae. 



London,Trans.Ent. Soc., p. 3o7-3a8, pi. XIII-XIV. 



i885 a . — Galls on the roots of Orchids. 



Gard.Chron ,London.,(2) t. 24, p. 84, fig. 19-20. 



WHITEHEAD C. et GRAY 



1887^ — Report of the Commissioners appointed by the 

 Government to enquire into the présent Visitation of the 

 Hessian-Fly on corn-crops in Great-Britain. 



London. 



WILLOT M. 



iQoi a . — Le Xématode de la betterave (Heterodera Schachtii). 



Paris,C.-R.Acad.Sci.,t.i33,p.7o3. 



