426 M. W. R. de V. GRAHAM 



synonymy with xylophagorum (Ratzeburg) by Burks (in Krombein et al., 1958 : 76) ; 

 Burks stated that Peck had examined Provancher's type. 



Platygerrhus ? scolyti Ashmead. Type (U.S.A., West Virginia, Morgantown) in 

 U.S. Nat. Mus. (not seen by the writer). Placed in synonymy with xylophagorum 

 by Peck (in Muesebeck et al., 195 1 : 549). 



Widely distributed, probably the whole of Europe ; U.S.A. ; Guatemala ; Japan. 



Biology. Reared from many species of Scolytidae ; for its biology see Hedqvist 

 (1963 : 70) who says that it is apparently more frequently found on spruce than on 

 pine. Usually 1 generation per annum, 2 in good seasons ; imagines normally in 

 June and late summer. 



Note. Pachyceras typographi Gyorfi (1952 : 114, 116-117, $) was reared by 

 Gyorfi in the middle of April 1947, from Ips typographus L. under bark of spruce at 

 Sopron, Hungary. I have not seen the holotype female. Gyorfi says (ibid. : 171) 

 that it differs from xylophagorum Ratzeburg in its larger size (4-5 mm.), darker 

 colour, and the yellowish brown middle part of the ovipositor. These distinctions 

 are of doubtful validity ; xylophagorum is quite variable in colour, and I have a 

 female which, including ovipositor sheaths, measures 5-4 mm. in length. Unless 

 other differences not mentioned in the description exist, typographi would appear to 

 be a form of xylophagorum which, incidentally, has been reared from the same host 

 as that cited for typographi. 



Roptrocerus brevicornis Thomson 



Roptrocerus brevicornis Thomson, 1878 : 85, $. 



Roptrocerus brevicornis Thomson ; Hedqvist, 1963 : 61, 62, 64-66, o* $. 



Type material. One female, LECTOTYPE, labelled " Die Bhn " [Dalecarlia, 

 Boheman] and " brevicornis Ths ". 



Sweden, Finland, U.S.S.R. 



Biology. Hosts Pityogenes quadridens Htg., P. bidentatus Htg. and other Scoly- 

 tidae (see Hedqvist, 1963: 66, who says that it is apparently associated with Pinus). 



XIPHYDRIOPHAGUS Ferriere 



Xiphydriophagus Ferriere, 1952 : 323. Type-species : Pteromalus meyerinckii Ratzeburg, 1848, 



by original designation. 

 Xiphydriophagus Ferriere ; Peck et al., 1964 : 42. 



Xiphydriophagus meyerinckii (Ratzeburg) 



(Text-fig. 288) 



Pteromalus Meyerinckii Ratzeburg, 1848 : 198-199, $. 



Pteromalus meyerinckii Ratzeburg ; Kurdjumov, 1913 : 22. 



Pteromalus xiphydriae Fahringer, 1935 : 212. 



Xiphydriophagus meyerinckii (Ratzeburg) Ferriere, 1952 : 323-324, o" $• 



Type material. Pteromalus meyerinckii Ratzeburg. Types presumed destroyed. 



