OF EPPING FOREST. 



143 



being on June 4th, though doubtless it appeared at an earlier 

 date. 



(4.) Agamic Generation. IV. Neuroterus fumipennis 

 (Htg.). Inquiline. Synergus tschcki (Mayr.) 



Gall. 



Appears on the under-surface of the leaf. Numbers are found 

 on one leaf, but usually they are not so numerous as in the 

 preceding case (diameter 2-3 mm.). Colour : Pale reddish 

 covered with a very delicate pubescence. Shape: Circular or, 

 nearly so, with edges more or less curved upwards, and often 

 •emarginate. 



Imago. 



Colour : Black. Atifemtae : Brownish, 2-3 basal joints yellow. Thorax : 

 Dull black, scutellum strongly shagreened. Abdomen: At base orange. Legs'. 

 Orange. Coxae brownish. Wings: Hyaline. ist cubital cellule clouded. 



(4.) Sexual Generation. IVa. Neuroterus tricolor 

 (Htg.) Inquilines. Synevgus alhipes (Htg.) 5. facialis (Htg.) 

 S. thaumacera. (Dalm.) 



Gall. 



This appears on the leaf and sometimes on the stem. There 

 may be one gall only, but usually more. Two or three may be 

 amalgamated, and the leaves are usually more or less distorted. 

 Colour : White or reddish, covered with a fair number of stiff 

 upright pinkish or white hairs. Shape : Round, with the top 

 sometimes slightly flattened. Texture : Soft and succulent. 



Imago. 



Colour: Black. Antennae : Dark, with basal joints paler. Thorax: 

 Slightly shining, scutellum rugose. Abdomen : Dark brown, broadly reddish at 

 the base. Legs : Yellowish red. Wings : Clouded, especially at the apices. 



Account of Generation Cycle. 

 The Neuroterus funiipennis galls fall to the ground in autumn, 

 but the larvae remain as such throughout the winter, and in 

 March they will be found to be in the same state as in the 

 preceding autumn, when the galls dropped to the earth. They 

 pupate at the end of April, and the perfect insects emerge in 

 May. The eggs are laid in the swelling buds, giving rise to 

 Neuroterus tricolor galls in June. These galls mature in July, 

 yielding up the insects at about the middle of the month. As in 

 all the preceding species, the sexual generation oviposits in the 



