PTEROMALIDAE OF N.W. EUROPE 451 



he had examined and considered to be part of Lindeman's original material ; he 

 stated that they could not be distinguished from American specimens of destructor. 



Britain, France, Central Europe, U.S.S.R ; North Africa ; Canada, U.S.A. 



Biology. This species was regarded by Gahan (1933) as one of the most 

 important parasites of the Hessian-fly, Mayetiola destructor Say ; he stated that it 

 is normally a solitary, primary ectoparasite. Occasionally, however, it may act 

 as a secondary parasite through Platygaster hiemalis Forbes or P. zosine Walker. 

 According to other authors it will also attack Mayetiola avenae Marsh., Oscinella 

 frit (L.) and Elachiptera cornuta (Fin.) (see Gahan, 1933 : 94). Imagines July- 

 August in Britain. 



Homoporus brunneiventris Szelenyi 



Homoporus brunneiventris Szelenyi, 1956 : 172, 175-176, $. 



Type material. Holotype $, Hungary, Nagykovacsi, Nagyszenas, 7.vii.i953, 

 in a Festucetum sulcatae community {Szelenyi) in Hungarian National Museum, 

 Budapest (not seen). Szelenyi (1956 : 172, 176) stated that the female of 

 brunneiventris differed from that of destructor in having the antennal clava distinctly 

 3-segmented and shorter than the two preceding funicular segments together, the 

 first funicular segment being subequal in length to the sixth, and in having the 

 propodeal nucha present and occupying more than half the length of the propodeum. 



Hungary. 



Biology. Unknown. 



Homoporus subniger (Walker) 



Pteromalus subniger Walker, 1835 : 95, 3* $. 



Pteromalus chalcomelas Walker, 1836 : 476, <j>, syn. n. 



Homoporus (Phaenacrinodes) kuvdjumovi Szelenyi, 1956 : 179-180,$ $. 



Homoporus danuvianus Delucchi, 1957a : 413, o* $, syn. n. 



Type material. Pteromalus subniger Walker. Syntypes, 9 specimens. LECTO- 

 TYPE, the fourth specimen, a female, bearing a Waterhouse label. 



Pteromalus chalcomelas Walker. Syntypes, 2 $. One is selected as LECTO- 

 TYPE ; it bears a Waterhouse label. 



Homoporus kurdjumovi Szelenyi. Holotype, Hungary, Budapest, ? in coll. 

 Szelenyi (not seen by the writer). The species was placed in synonymy with 

 subniger (Walker) by Boucek (19650 : 35). 



Homoporus danuvianus Delucchi. Type $ in Naturhistorisches Museum, Vienna ; 

 Delucchi mentioned several specimens but did not specify which was the type. 



Britain, Czechoslovakia, Moldavian S.S.R. 



Biology. Several specimens were reared in England : Cambridgeshire, The 

 Devil's Dyke, in June and July 1965, from stems of Centaurea scabiosa L. (host not 

 ascertained, but probably Phanacis centaureae Forster). Recorded [as kurdjumovi 



