EUURA SALTCET1. 215 



the white colour on the mouth varies ; and often the 

 black on the abdomen has a decidedly brownish or 

 fuscous tinge, I have also seen specimens in which 

 the flagellum of the antennae had scarcely a trace of 

 brown or red, and others with the tegulse fuscous. 

 The clypeus may be entirely whitish or only so at the 

 apex. In the $ generally the tegulae are brownish or 

 fuscous. It is the smallest of our species. 



The larva lives in the leaf -buds of Salix aurita, and 

 in habits scarcely differs from E. nigritarsis. The larva 

 is greenish-yellow with a more or less brownish head, 

 fuscous on the top ; mandibles brownish. It enters the 

 twig from the bud and penetrates 2 or 3 lines into it 

 for the purpose of passing into a pupa. 



Common. 



Continental distribution : Sweden, Germany, France. 



I have found this autumn, in Cadder Wilderness, 

 near Glasgow, leaves of Salix caprea with their leaf- 

 stalks considerably thickened, the swelling extending 

 from the base to the commencement of the leaf. The 

 galls were green like the leaf-stalk itself, but some of 

 the younger ones had a slight reddish tinge in the 

 centre. Each contained a yellowish-green larva, with 

 a more or less fuscous-tinted head, black eye-spots, and 

 brownish mouth. The gall was eaten out almost 

 entirely, and became towards the end filled with 

 brownish frass. The larva left it by making an irre- 

 gular hole, if it pupated in the ground, but some spun 

 the cocoon inside the leaf-stalk itself. 



I hope to rear this species next spring. From the 

 description of the gall and larva I have no doubt that 

 it will prove to be E. venusta, Zad. (Beob. ii Blatt. 

 ii Holzw. (2) p. 6). 



06s. Ed. Newman (Ent. Mag., iv, p. 260) describes two species which 

 he named E. gallce and E. cynips, which I am unable to identify from 

 his descriptions. Mr. Kirby (List of Hym., i, p. 151) refers the former 

 to E. saliccti, and the latter he gives as a distinct species. It is not likely 

 that either of them is distinct from any of the species I have recorded 

 in the preceding pages. 



Jurine (Hym., pi. vi) figures a species of Euura under the name of 



