pteromalidae of n.w. europe 787 



Sweden, Germany, Austria, Poland, Hungary. 



Biology. Endoparasite of imago of Ips typographus L. ; also recorded from 

 ips acuminatus Gyll., /. duplicatus Sahib., and /. amitinus Eichh. (Col., Scolytidae). 

 For a detailed account of the biology see Sachtleben (1952 : 175-179). 



[Tomicobia tibialis Ashmead 



Tomicobia tibialis Ashmead, 1904 : 283, $. 

 Tomicobia tibialis Ashmead ; Gahan, 1938 : 221-222. 

 Tomicobia tibialis Ashmead ; Hedqvist, 1959 : 178, 180-181. 



This species was not described by Ashmead, but is validated by the generic 

 diagnosis in Ashmead's key (1904 : 283). Later it was described by Gahan (1938). 

 I have not seen the types which are in U.S.N.M., but have examined authenticated 

 material from North America. The species is included in my key to show the 

 differences between it and seitneri (Ruschka).] 



DIRHICNUS Thomson 



Metopon sgen. Dirhicnus Thomson, 1878 : 165, 170. Type-species : D. subcoeruleus Thomson, 



by designation of Ashmead, 1904 : 314. 

 Dirhicnus Thomson ; Ashmead, 1904 : 314, 315. 



Dirhicnus Thomson ; Schmiedeknecht, 1909 : 309, 310, 313, [ex parte]. 

 ? Dirhicnus Thomson ; Kurdjumov, 1913 : 16, [ex parte]. 

 Dirhicnus Thomson ; Nikol'skaya, 1952 : 228, ex parte. 

 Dirhicnus Thomson ; Boucek, 1961a : 448, [ex parte]. 

 Dirhicnus Thomson ; Peck et al., 1964 : 56. 



This genus has been little noticed since its description. Most or all of the species 

 referred to it by Kurdjumov (1913) do not belong here. Boucek (1961) described 

 a new species conopidarum which he placed provisionally in Dirhicnus ; I think, 

 however, that it belongs rather to Habrocytus, or is at least very near it. Consequently 

 only two species remain in the genus. 



The mandibles of pirus (Walker) are unusually variable. Of the specimens 

 examined, most have the mandibular formula 3.4 with the inner tooth of the left 

 mandible truncate, the inner tooth of the right mandible obtuse ; one has the 

 formula 4.4 with the inner tooth of both mandibles obtuse ; one has the formula 

 3.3 with the inner tooth of both truncate. 



Key to European Species 

 (Females) 



1 Head in dorsal view (Text-fig. 646) with temples one quarter to one third as long as 

 the eyes, less convergent. Antennae brown to fuscous with at most the scape and 

 pedicellus more or less testaceous ; tegulae usually brown to black, occasionally 

 partly testaceous ; femora infuscate at least proximally . . pirus (Walker) (p. 788) 



- Head in dorsal view (Text-fig. 647) with temples one fifth as long as eyes or even 

 rather less, more convergent. Antennae, tegulae, and legs, not counting coxae, 

 yellowish or testaceous ....... ferrierei (Hedqvist) (p. 788) 



