628 M. W. R. de V. GRAHAM 



Britain, Sweden, Germany. 



Biology. Associated with Betula but host not yet determined. Imagines 

 June- August. 



Psilonotus hortensia Walker 



(Text-figs. 514-516) 



Psilonotus Hortensia (Haliday MS.) Walker, 1846a : 113, g $. 

 Psilonotus alticornis Graham, 1957a" : 2 3 2 > 6* ?> s Y n - n - 



Type material. Psilonotus hortensia Walker. There is one female so labelled in 

 BM(NH) but it disagrees with the description in having the legs much too dark. 

 LECTOTYPE, a $ in the Haliday collection (no. 1708), bearing a white label 

 " hortensia " in Haliday 's handwriting. 



Psilonotus alticornis Graham. Holotype $, England : Berkshire, Bagley Wood, 

 31.vii.1954, in Hope Department, University Museum, Oxford. 



Britain. 



Biology. Unknown ; the species occurs with adamas and achaeus on Betula, 

 but is more uncommon. Imagines June-Sept. 



Note. Eutelus betulae Girault (19176 : 93) from Albany, New York, U.S.A., 

 host Semudobia betulae, might well belong to Psilonotus. I have not seen the 

 species. 



ANOGMUS Forster 



Anogmus Forster, 1856 : 59, 61. Type-species : A. strobilorum Thomson, 1878, by subsequent 



reference. 

 Anogmus Forster, Giraud, 1877 : 427. 



Roptrocerus sgen. Anogmus Forster ; Thomson, 1878 : 83, 85. 

 Eutelus (Platytermus) Thomson, 1878 : 77 [ex parte']. 

 Anogmus Forster ; Ashmead, 1904 : 323. 

 Anogmus Forster ; Kurdjumov, 1913 : 3. 

 Anogmus Forster ; Erdos, 1948a : 2-7, 9. 



Platythorax Erdos, 1948a : 4, 6. Type-species : Eutelus piceae Ruschka, by original designation. 

 Anogmus Forster ; Nikol'skaya, 1952 : 214. 

 Anogmus Forster ; Bakke, 1955 : 177-187. 

 Anogmus Forster ; Graham, 19570" : 233-235. 

 Anogmus Forster ; Peck et al., 1964 : 49, 52. 

 Anogmus Forster ; Boucek, 1966a : 52-57. 



The genus has just been revised by Boucek (1966a) who gives a key to the 

 European species, one of which is described as new, information on distribution and 

 biology, and a discussion of some synonymy. My own key to the European 

 species was produced independently and to a slight extent uses characters not 

 employed by Boucek. I think it will be a useful complement to his key ; I have 

 modified it to include his new species. 



All the European species develop in cones of coniferous trees, where they attack 



