216 EUURA SALICETI. 



Pteronus ater, which Hartig doubtfully referred to aw gusto, -, Mr. Kirby 

 (List of Hym., i, p. 152) inclines to the opinion that it is pentandrte, 

 and Kriechbaumer (Mitth. Schw., Ent. Ges., vi, 390) is also of this 

 opinion. The tegulse and edge of pronotum, however, are quite black, 

 and the length given rather too small for E. pentandrce. The ater of 

 Zaddach will prove, 1 think, to be only a var. of E. angusta. 



