142 THE SCOTTISH NATURALIST 



Other specific characters are to be found in the antenna:, the 

 chtetotaxy of the radius and the shape of the abdominal tergites. 



In the British Museum the type of Pteroinahis thessahis, 

 Walker — a male — is still extant in the British collection, while 

 in the General Collection there are two more males under the 



Head of Stenomalus muscantm, Linn., 9, seen from in front. 



same name. With Walker's type there is also a correctly 

 determined female from the Marshall collection labelled P. 

 iniiscarum. Some additional specimens under the same 

 name from the Cooke collection are incorrectly determined. 

 The species occurs all over Europe, and is doubtless common, 

 but I shall be glad to examine examples of this or any 

 Chalcid either bred from Muscids or found in association 

 with the adult flies themselves, from any part of Britain. 



British Museum (Natural History), 

 South Kensington, S.W. 



