Galls caused by the queen and nymphs of Siphocoryne 

 xylostei Schrk. 



on 



the flowers of Lonicera periolymenam Linn. 



PLATE 127. 

 Synonymy of Insect. 



Aphis xylostei Schr., Kalt., Walk. 

 Rhopalosiphum xylostei Koch. 

 Siphocoryne xylostei Pass. 



Habitat of the Common Honeysuckle.— Very plentiful 

 throughout Britain in almost every hedge, and twining 

 around the stems of hazel-bushes in woods and thickets. 



The Gall is formed by the punctures of the queen and 

 pupa; causing a thickening of the base of the corolla. 



Position. — At the base of the corolla. 



Manner of Growth.— The entire base of the corolla is 

 thickened. 



Colour. — Pale green, same as the stem of the flower. 



Average Dimensions of a M.a.ture Specimen. 

 Length, lo mm. ; girth, 12 mm. 



May be sought during the months of June, July, and August. 



The Growth is complete by the end of July. 



The Typical Condition of the gall is multinymphal. 



EcDYSIS takes place within the gall. The imagines emerge 

 during July. 



By the attacks of Sipfwcoryne xylostei many lovely clusters 

 of blossoms are spoilt and rendered unpleasing to the eye, 

 which otherwise might be gathered and form a charming 

 addition to a nosegay of wild flowers. Honeysuckle, however, 

 at times and in some places is so plentiful that the depredations 

 caused by this aphis are not so noticeable as they might be. 

 Cultivated plants are also attacked. 

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