PTEROMALIDAE OF N.W. EUROPE 527 



Biology. Reared from Cionns sp. (Col., Curculionidae) on Scrophularia sp. at 

 Wytham Wood, Berkshire, England (G. R. Gradwell). Otten (1940 : 184) reared 

 it in Germany from pupae of Clonus tuberculosus (Scop.) ; he obtained up to 7 of 

 the parasites from a single host-pupa, though in most cases 3-5, in a single case 

 only 1. Imagines July-August. 



The BEDEGUARIS-Grovp 

 Habrocytus bedeguaris Thomson 



Habrocytus bedeguaris Thomson, 1878 : 123, $ $. 

 Habrocytus bedeguaris Thomson; Callan, 1944 : 90-91. 



Type material. Syntypes, 6 specimens. LECTOTYPE, a female labelled 

 " Jvg 12/6 " and " Bedeguaris Ths ". 



Widely distributed in Europe ; Canada, U.S.A. (introduced into the latter two 

 countries). 



Biology. A well-known parasite of Diplolepis rosae L. (Hym., Cynipidae). 

 Imagines in May, June and August. 



Habrocytus isarchus (Walker) comb. n. 



Pteromalus Isarchus Walker, 1839 : 216, o*. 



Type material. 4 <$ stand under this name, but one is probably not original 

 material ; LECTOTYPE, the fourth specimen, bearing a Waterhouse label. 



Britain, Sweden. 



Biology. Reared in England from Xestophanes potentillae Vill. on Potentilla 

 reptans L. (Dr. M. F. Claridge). I have captured the species where no P. reptans 

 was present but P. erecta (L.) Rausch. was common, so that it probably also parasi- 

 tises a host on the latter plant. Imagines Aug.-Sept. (one record for May). 



Species sola 

 Habrocytus chrysos (Walker) 



Pteromalus chrysos Walker, 1836 : 491, 2. 



Pteromalus inclusus Walker, 1836 : 493, $, syn. n. 



Pteromalus Zipaetes Walker, 1839 : 213, o\ syn. n. 



Pteromalus Telon Walker, 1839 : 216, <J, syn. n. 



? Pteromalus eucerus Ratzeburg, 1848 : 198, $ $. 



Habrocytus acutigena Thomson, 1878 : 117, J 2- syn. n. 



? Habrocytus distinguendus Masi, 1908a : 113-115, $. 



? Habrocytus hyponomeutae Masi, 1909 : 13-15, ?. 



? Habrocytus metallifemur Bukovskij, 1938 : 157-159, 6* ?• 



Habrocytus eucerus (Ratzeburg) Otten, 1942a : 122-124, pi. 5, figs. 1, 4, 6 : pi. 6, fig. 4, 3* 2. 



Habrocytus cf. eucerus (Ratzeburg) ; Blunck, 1944 : 483-485, $ $. 



Habrocytus eucerus (Ratzeburg) ; Ferriere, 1952a : 171. 



Habrocytus chrysos (Walker) Boucek, 1965c : 8. 



Type material (all Walker lectotypes bear Waterhouse labels) . 



