560 M. W. R. de V. GRAHAM 



larger and more distinctly sculptured postspiracular sclerite, and a rather different 

 propodeum. These differences are, however, small. The male has the gena 

 deeply excised above the base of the mandible, so that the malar space is short. 

 This character, however, occurs in the males of some Habrocytus and Pteromalus 

 (as well as in other genera). 



Holland, Germany, Czechoslovakia. 



Biology. Parasite of Physocephala vittata (F.) and Ph. sp. (Dipt., Conopidae), 

 developing as endoparasites of adult bumble-bees, e.g., Bombus lapidarius L. and 

 B. agrorum F. Details of its life-history were given by de Meijere (1904), Postner 

 (1951) and Boucek (1961a). According to Postner often more than 40 of the chalcids 

 develop in one Conopid puparium and emerge by a single hole. The Conopids 

 are probably attacked shortly before pupation. Usually the fully-grown chalcid 

 larvae hibernate within the host puparium and emerge the following summer, 

 though when reared indoors they may emerge the same autumn. 



Species incertae sedis 

 Habrocytus sophax (Walker) comb. n. 



Pteromalus Sophax Walker, 1839 : 249, $. 



Type material. One $, LECTOTYPE, bearing a Waterhouse label. 



This species is included in my key to males of Habrocytus from characters observed 

 in the lectotype. It appears to be a valid species, but so far I have not definitely 

 associated any female with this male. 



Britain : Cornwall, Land's End (Walker, 1839) '> a cT taken by me at Marazion, 

 7.vii.i955, appears to be conspecific with the lectotype. 

 Biology. Unknown. 



Extra-limital species which belong to Habrocytus 



The following appear to be very near the European species H. intermedius 

 (Walker) : 



Habrocytus unca (Walker) comb. n. 



Pteromalus Unca Walker, 1839a : 28, $. 



Type locality. Tasmania, " Hobart Town, Van Diemen's Land ". Syntypes, 

 2 <j>, which are probably conspecific (Types Hym. 5. 736a, b). 



Habrocytus niphe (Walker) comb. n. 



Pteromalus Niphe Walker, 1839a : 29, $. 



Type locality. Tasmania, " Hobart Town, Van Diemen's Land ". One female, 

 Type Hym. 5. 746. 



