572 M. W. R. de V. GRAHAM 



those of Ablaxia in having the anterior margin of the clypeus incised, and in its 

 shorter propodeum which has a less distinct costula. It is also very close to 

 Apelioma Delucchi but differs in its incised clypeus, also in the antennal clava of 

 the female which has only a small area of micropilosity. These genera are very 

 close to one another and some or all of them may eventually have to be united. 



Dinotoides tenebricus (Walker) comb. n. 



Amblymerus tenebricus Walker, 1834 : 351, $. 

 Pteromalus Carcinus Walker, 1839 : 229, $ $, syn. n. 

 Pteromalus Ariovistus Walker, 1839 : 244, $, syn. n. 

 Pteromalus Antho Walker, 1845 : 262, $, syn. n. 

 Dinotoides bicalcaratus Boucek, 1957 : 162-164, $ ?, syn. n. 



Type material (all the Walker species bear a Waterhouse label). 



Amblymerus tenebricus Walker. One female, LECTOTYPE (possibly holotype). 



Pteromalus carcinus Walker. One male, LECTOTYPE. 



Pteromalus ariovistus Walker. One male, LECTOTYPE (possibly holotype). 



Pteromalus antho Walker. One male, LECTOTYPE ; it is a dwarf of tenebricus. 



Dinotoides bicalcaratus Boucek. Holotype $, Czechoslovakia, north-eastern 

 Bohemia, Holovousy, May 1954, reared from twigs of Malus silvestris Mill. 

 (H. Hostounsky) in Narodni Museum, Prague (Cat. no. 3088). 



Britain, Czechoslovakia, Sardinia. 



Biology. Reared from twigs of Malus silvestris Mill, with Magdalis ruficornis 

 (L.), Tetrops praeusta (L.) and Scolytus sp. in Czechoslovakia (see Boucek, 

 1957 : 164) ; also recorded [under the name Dinotoides bicalcaratus] as a parasite of 

 Magdalis barbicornis Latr. in Sardinia (1963, Entomophaga 8 : 343, 356). In England 

 I have beaten it from the foliage of Quercus robur L. Imagines in May (Czechoslo- 

 vakia), Aug.-Sept. (Britain). 



ABLAXIA Delucchi 



Etroxys sgen. Caenacis Forster ; Thomson, 1878 : 98-100 [ex parte]. 



Ablaxia Delucchi, 1957 : z 43- Type-species : Etroxys (Caenacis) squamifera Thomson, 1878, 



by original designation. 

 Ablaxia Delucchi ; Peck et al., 1964 : 56. 



Key to European Species 



(Females) 



1 Antennae with anelli not strongly transverse, their combined length nearly as 



great as that of the first funicular segment. Fore wing (Text-fig. 422) with 

 marginal vein only 1 -3 to 1 -4 times as long as the stigmal vein, the latter 

 forming a very acute angle (about 30°) with the postmarginal vein. Gaster 

 ovate, not longer than the thorax . . . anaxenor (Walker) (p. 576) 



Antennae with anelli strongly transverse, their combined length much less 

 than that of the first funicular segment. Fore wing with marginal vein 

 1 -4 to 1 -8 times as long as the stigmal vein, the latter usually forming a less 



