PTEROMALIDAE OF N.W. EUROPE 793 



Arthrolytus (Anarthrolytus) ocellus Walker 



(Text-figs. 648, 649) 



Eutelus ocellus Walker, 1834 : 359, <J. 

 Arthrolytus albiscapus Thomson, 1878 : 159, $. 

 Arthrolytus ocellus (Walker) Graham, 19566 : 254. 



Type material. Eutelus ocellus Walker. Lectotype designated by Graham 

 (19566 : 254). 



Arthrolytus albiscapus Thomson. Syntypes, 6 specimens. LECTOTYPE female 

 labelled " Rsio " [Ringsjo] and " albiscapus Ths ". 



Britain, Sweden, Czechoslovakia, Moldavian S.S.R. 



Biology. Unknown. Imagines captured in May, June, September. 



Boucek (1967 : 639) when comparing the female of his species glandium with that 

 of ocellus, remarks that in $ ocellus the marginal vein is on the average 1 -62 times as 

 long as the stigmal vein, and is not less than 1 -49 times as long. The $ of glandium 

 is said to have the marginal vein 1 -3-1 -43 times as long as the stigmal vein. Some 

 females of ocellus have the fore wings rather shorter and narrower than usual, and 

 in these the marginal vein is sometimes only 1 -4 times as long as the stigmal. One of 

 the best criteria for distinguishing the two species appears to be the angle which the 

 stigmal vein makes with the postmarginal. 



Arthrolytus (Anarthrolytus) glandium Boucek 



Arthrolytus glandium Boucek, 1967 : 637-639, figs. 4, 5, c? $• 



Type material. Holotype 9. allotype <$, and paratypes J $, Czechoslovakia : 

 Slovakia, in Narodni Museum, Prague. 



Czechoslovakia. 



Biology. Parasite of Curculio (=Balaninus) sp. (Col., Curculionidae) living in 

 acorns (Boucek, 1967). 



Sgen. ARTHROLYTUS, s. str. 



Arthrolytus (Arthrolytus) slovacus sp. n. 



(Text-figs. 650, 651) 



The diagnostic characters of this species are given in my keys to species of 

 Arthrolytus (<$, $) and need not be repeated here. Some additional characters are 

 the following: 



$. — Head and thorax bluish black ; gaster, excepting the pale areas, bronze with purplish 

 reflections. Antennal scape and pedicellus testaceous, the latter darker apically ; flagellum 

 black. Legs testaceous ; fore coxa blackish externally, mid and hind coxae blackish at base ; 

 fore and mid femora slightly infuscate medially ; pretarsus and claws of all tarsi fuscous. 

 Tegulae testaceous, brown posteriorly ; wings slightly yellowish, with a faint infumate discal 

 cloud. Length 2-5 mm. 



