4 o M. W. R. de V. GRAHAM 



Heydenia pretiosa Forster ; Heqvist, 1957a : 40-43, <J ?. 

 Heydenia silvestrii (Russo) Heqvist, 1957a : 47-48, £ $. 

 Heydenia pretiosa Forster ; Boucek, 1958 : 368-369, <$ $. 

 Heydenia pretiosa Forster ; Hedqvist, 1963 : 53-54, 6* ?• 



Type material. Types of Heydenia pretiosa Forster, H. excellens Wachtl, and 

 Lycisca silvestri Russo, re-examined by Boucek (1958 : 365-366). H. excellens 

 Wachtl was placed in synonymy with pretiosa Forster by Heqvist (1957 : 40) and 

 this synonymy was confirmed as correct by Boucek (1958 : 365). Lycisca silvestrii 

 Russo was transferred to Heydenia by Heqvist (1957a : 47) who remarked that it 

 appeared to be very near pretiosa Forster ; later Boucek (1958 : 368) synonymized 

 silvestrii with pretiosa. 



The variation of pretiosa is discussed by Boucek (1958 : 365-368) and is parti- 

 cularly evident in the structure of the fore femora in males, a range of variations 

 being illustrated by the same author (1958, figs. 10-24). 



France, Sweden, Finland, Germany, Austria, Czechoslovakia, Hungary, 

 Italy, U.S.S.R. 



Biology. Parasite of various Ipidae, especially Myelophilus minor Htg., but also 

 Ips acuminatus Gyll. and /. typographus L. ; and of Scolytus ratzeburgi Jans. It 

 has been reared in Italy from olive-branches together with species of Scolytidae 

 (Phloeotribus scarabaeoides Bern., Leperesinus fraxini (Pz.) and Hylesinus toranio 

 Bern.) ; in Slovakia from fir branches with Pityokteines vorontzovi Jac. and from 

 elm branches with Scolytus Pygmaeus F., 5. multistriatus (Marsh.), Magdalis armigera 

 (Geoffr.) and species of Cerambycidae ; for details see Boucek (1958 : 368) and 

 Hedqvist (1963 : 54). Imagines mainly in June (single records for March, Aug. and 

 Dec). 



PANNONIELLA Erdos 



Pannonica Erdos, 1946 : 131. Type-species : P. sexramosa Erdos, by original designation 



[generic name pre-occupied by Pannonica Loerenthey, 1895, Foldtani kozlony, 25 : 392]. 

 Pannonica Erdos, 1957 : 61. 

 Pannonica Erdos ; Boucek, 1958 : 371. 



Pannoniella Erdos, i960 : 306 [n. n. for Pannonica Erdos nee Loerenthey]. 

 Pannoniella Erdos ; Peck et al., 1964 : 29. 



Only one species is known. 



Pannoniella sexramosa (Erdos) 



Pannonica sexramosa Erdos, 1946 : 132-133, 5*. 



Pannonica sexramosa Erdos, 1957 : 3 0I > ?• 



Pannonica sexramosa Erdos ; Boucek, 1958 : 371, figs. 25-26, q* $. 



Pannoniella sexramosa (Erdos) ; Erdos, i960 : 306. 



Type material. Holotype^, Hungary, Hogyesz, 26. vi. 1946 (Erdos) in coll. Erdos. 



France, Austria, Czechoslovakia, Hungary, Bulgaria, U.S.S.R. 



