526 M. W. R. de V. GRAHAM 



The OCHROCERUS-Grovp 

 Habrocytus ochrocerus Thomson 



Pteromalus ovatus Walker, 1835a : 77, $ $ [nee Nees, 1834]. 



? Pteromalus Bienna Walker, 1848 : 125, 195, <$. 



Habrocytus ochrocerus (Dalman MS.) Thomson, 1878 : 114, 6* ?• 



Pteromalus ovatulus Dalla Torre, 1898 : 139 [n. n. for P. ovatus Walker nee Nees], syn. n. 



Type material. Pteromalus ovatus Walker. 6 specimens under the name 

 ovatulus, bearing Waterhouse labels " Pteromalus ovatus Nees " [sic]. Two of these 

 at least are syntypes of ovatus Walker ; LECTOTYPE, third in series. 



Pteromalus bienna Walker. One male, LECTOTYPE ; Waterhouse label. It 

 might well be the male of ochrocerus Thomson but I am not absolutely certain. 



Habrocytus ochrocerus Thomson. Syntypes, 8 specimens. LECTOTYPE, a 

 female bearing a tiny white ticket, also a label " ochrocerus Dalm.". 



Britain, Sweden. 



Biology. 3 $ were reared in Cambridgeshire on 13. vi. 1932, from galls of Isocolus 

 rogenhoferi Wachtl on Centaur ea scabiosa L. (G. C. Varley), material in Hope Dept., 

 University Museum, Oxford. Imagines occur in the field May-July. 



Habrocytus ? papaveris (Forster) 



? Pteromalus papaveris Forster, 1841 : 21, <J $. 



? Habrocytus papaveris (Forster) Kurdjumov, 1913 : 20. 



Type material. Syntypes (not seen) in Naturhistorisches Museum, Vienna. I 

 have examined a Forster specimen in the collection of Zoologische Sammlung des 

 Bayerischen Staates, Munich. 



? Britain ; Germany. 



Biology. Reared in England : Sussex, Peacehaven, 24.lv. 1929, from Aylax 

 papaveris (Perris) on Papaver rhoeas L. (M. Niblett). 



The British specimens are hardly distinguishable from females of ochrocerus 

 Thomson except that they have the postmarginal vein only as long as the marginal 

 vein, the head very slightly less transverse, and the antennal flagellum a little 

 stouter. The variation and host-range of ochrocerus needs to be studied in detail 

 before one can be sure if the species here presumed to be papaveris is really distinct. 



Species sola 

 Habrocytus cioni Thomson 



Habrocytus cioni Thomson, 1878 : 115, <J $. 

 Habrocytus cioni Thomson ; Otten, 1940 : 184. 



Type material. Syntypes, 2 $, 2 $. LECTOTYPE, a female labelled " Sm." 

 [Smaland], " Bhn " [Boheman] and " Cioni Ths ". 



Britain, Germany, Sweden. 





