184 NEMATUS TOGATUS. 



The walls are thin, and the space inside is larger than 

 in any other gall. As a rule the colour is the same as 

 the leaf, but occasionally the galls are reddish above. 



When young the larva is greenish-white, the head 

 black, and claws blackish. Full fed it is slate-coloured, 

 the head fuscous, eyes situated in a dark fuscous 

 splash. The joints of the legs are marked with black, 

 as well as the claws. Brischke figures the larva with 

 a large black mark at the base of the legs, but I did not 

 notice that my larvaB bore such a mark. At the tail 

 the larva is rather attenuated. 



The imagos appear in June, the galls in June, July, 

 and August. Rannoch is the only British locality 

 known to me. 



Sweden, Germany, Switzerland, France. 



91. NEMATUS TOGATUS. 



Nematus togatus, Zaddach, Schr. Ges. Konig., xvi, pi. Ill, f. 3 ; 



1. c., xxiv, 326, 71. 



Black ; abdomen (except the two basal segments above and sheath 

 of saw) and legs luteous ; labrum, pronotum, and tegulae pallid yellow. 

 Wings hyaline, costa and stigma yellow ; clypeus deeply incised. 

 Orbits of eyes behind more or less luteous. Antennae not much longer 

 than abdomen, short, thick, covered with microscopic pile; third 

 joint a little shorter than fourth; the underside of the antennae brown- 

 ish, especially towards the apex. The sutures on vertex are distinct, 

 deep ; pentagonal area large ; vertex and mesonotum with scutellum 

 finely punctured ; cenchri large. Abdomen not much longer than head 

 and thorax ; the first transverse cubital nervure is faint, the second in- 

 terstitial ; third cubital cellule longer than broad ; transverse recurrent 

 nervure in hind wing interstitial. The posterior tarsi are more or less 

 blackish or fuscous. 



The $ has the antennas longer, stouter, and quite black ; the stigma 

 darker ; otherwise as in $ . 



Length 2 lines. 



I am not aware of any satisfactory characters whereby 

 the imago of this species may be known from N. 

 vesicator. 



The larva is dark (especially on the back) olive 

 green, shining, the skin wrinkled ; the head shining 

 black, shortly pilose, lighter coloured at the mouth 



