APHILOTHRIX FECUNDATKIX. 83 



English names of gall.— "The Artichoke Gall/' " The Hop- 

 strobile Gall," " The Hop Gall," "The Lareh-cone Gall."' 



Position of gall. — In axillary and terminal buds. 



Manner of growth. — Single, sessile, aeiniforni, concealed. 



Colours. — Green, dark green, reddish-brown. 



Average dimensions of a mature specimen. — Height, 

 8 mm. ; l>readth, 4 mm. ; girth, 12 mm. 



May be sought during the months of June to September. 



Growth is complete by the end of August. 



The typical condition of the gall is unilocular and unilarval. 



The larva pupates in the gall. The imago emerges during the 

 following spring. .Sometimes not until two or three vears afterwards. 



Parasites, Nos. 11, 30, 47. 66, 59, 66, 116, 118. Inquilines, 

 Nos. 1-28, 132, 145. 



Alternate sexual generation : Andricns pilosus, Adler. 



This gall was observed in England by Dr. Sir 

 Thomas Browne, and mentioned by him in correspon- 

 dence with Dr. Merrett in 1668 (see Introduction). 



The branch shown on Plate XX has thirteen 

 strobiles growing on it, and it ma}" he considered a 

 very fine and unusual example of so numerous an 

 aggregation. 



This growth consists of two parts totall}' distinct 

 from each other in appearance, shape, size, structure, 

 manner of growth, and colour ; the outer and easily 

 recognisable portion, composed of a large number 

 of imbricated leaf-scales ; the inner and invisible 

 part, a small pip-like, glossy, more or less hard, 

 substance. 



The leaf-scales are of two shapes. Those occupying 

 a central position are long, narrow, and thread-like, 

 usually aljout ninety in numljer, and thickly covered 

 with long silky hairs. The external or enveloping 

 leaf-scales are not so numerous, oval or somewhat 

 triangular in outline, of varying shades of green, 

 mostly margined with a deeper shade of the same 

 colour, or with pink or purple, and these scales also 

 are thickly covered, but on the external surface only, 

 with long silky adpressed hairs, many more of which 

 spring from the margins and produce a delicate fringe. 



