NEITROTERUS FUMIPENNIS. 117 



Neuroterus fumipennis, Hartig. 

 (Plates XLVI and LX, div. A.) 



Neuroterus fumipennis, Tascli., Mayr, Thorns., Adler, Liclit., 

 Fitch, Miiller, Cameron, Marshall ; Sjxdhegaster tricolor, Schenck, 

 Hartig. Mayr, Adler, Licht. ; *S'. varius, Schenck. 



English name of gall. — "The Cupped Spangle Gall." 



Position of gall. — On the under-surface of the leaf. 



Manner of growth. — G-regariuiis, numerous, cupulate, stellately 

 pilose. 



Colours. — Grreen, greenish-yellow, covered l)ypink, rose-madder, 

 and red hairlets. 



Average dimensions of a mature specimen. — Height, 

 15 mm. : diameter, 3 mm. 



May be sought during the months of July to September. 



Growth is complete Viy the end of August. 



The typical condition of the gall is unilocular and unilarval. 



The larva pupates in the gall. The imago emerges during 

 May. 



Parasite, No. 182. Inquiline, No. 142. 



Alternate sexual generation : Spathegaster tricolor, Hartig. 



When this gall occurs in great profusion on a leaf 

 the appearance is very beautiful. The prevailing- 

 colour is rose-madder, varying from a pale shade to a 

 very deep tint. It is wholly due to numerous micro- 

 scopic stellate hairlets, Tsdiich, under magnification give 

 off an aureate sheen. As the leaf and the galls dry 

 the colour diminishes in brilliancy. 



Concerning the profusion of this gall : One leaf 

 measuring (without petiole) 153 mm. long and 68 mm. 

 from tip to tip of widest lobes, supported 489 galls, 

 and so crowded were they that 18 galls were within 

 one square cm. A part of the leaf is shown on Plate 

 LX, div. A. 



It is sometimes difficult to distinp'uish most immature 

 and some mature specimens of tbis gall from those of 

 N. lenficularis. They resemble each other very closely 

 by reason of a profusion of ver}' small reddish glossy 

 hairlets scattered upon the upper and under-surfaces. 



