Macromesus Walker 

 Macromesus Walker 

 Macromesus Walker 

 Macromesus Walker 

 Macromesus Walker 



PTEROMALIDAE OF N.W. EUROPE 43 



Graham, 1959a : 73-78. 

 Szczepariski, 1959 : 97-104. 

 Heqvist, i960 : 140-143. 

 Boucek, 1961 : 57. 

 Ghesquiere, 1963 : 81-90. 



The genus Macromesus remained unrecognized after its description until 1959, 

 when I redescribed it on the basis of fresh material compared with Walker's descrip- 

 tion, the type of its single included species being apparently lost. Later I found the 

 type specimen, which confirmed the correctness of my interpretation (see below 

 under amphiretus) . Heqvist subsequently (i960 : 140) placed Wesenbergia Kryger 

 in synonymy with Macromesus. Crossotomoria Delucchi was synonymized with 

 Macromesus by Ghesquiere (1963 : 82, 85). I am not sure whether the genus 

 Crossotomoria is valid ; it was named but not described, whilst no formal description 

 of a type-species was given, the single included species C. fdicornis was, however, 

 fully described. 



Macromesus has already proved to be widely distributed. Besides the European 

 species amphiretus Walker, Heqvist (i960) has described a new species americanus 

 from the U.S.A. ; in 1956 Delucchi described another new species (as Crossotomoria 

 filicornis) from the Belgian Congo ; and Ghesquiere (1963 : 86-89) a fourth species 

 africanus from Morocco. I have examined additional material from Corsica, India, 

 and New Zealand, which may represent other (undescribed) species. Ghesquiere 

 (1963 : 89-90) has given a key to the described species. The species are parasites 

 of Scolytidae and Curculionidae on coniferous trees. 



Macromesus amphiretus Walker 

 (Text-figs. 40, 61-66) 



Macromesus amphiretus Walker, 1848 : 106, 162, $. 

 Wesenbergia occulta Kryger, 1943 : 362-363, <£ $. 

 Macromesus amphiretus Walker 

 Macromesus amphiretus Walker 

 Macromesus amphiretus Walker 

 Macromesus amphiretus Walker 



Graham, 1959a : 73-7 8 , 6" ?• 

 Szczepahski, 1959 : 97-104. 

 Heqvist, i960 .142, <J $. 

 Ghesquiere, 1963 : 85, 89-90. 



Type material. Macromesus amphiretus Walker. In a previous paper (1959a : 

 73) I stated that the type-material of amphiretus appeared to be lost. In 1961, 

 however, I found in the BM(NH) a female specimen in a drawer not incorporated with 

 the main collection. This agrees well with the description and is undoubtedly a 

 Walker specimen ; it bears a printed label MACROMESUS and is now designated 

 LECTOTYPE of amphiretus. It also agrees with my redescription of the genus 

 (1959a : 77) and with the diagnosis of amphiretus given by Heqvist (i960 : 142). 

 The species has been redescribed by Szczepariski (1959). 



Wesenbergia occulta Kryger. Syntypes, not seen by the writer, 1 <$ and 1 $, 

 mounted on separate slides, in Universitetets Zoologiske Museum, Copenhagen. 

 Denmark, North Sealand, Strodam, $ io.v.1931, $ 4.V.1930 (Kryger). 



Britain, Denmark, Sweden, Finland, Poland, Czechoslovakia. 



