846 M. W. R. de V. GRAHAM 



Coryna dubia Buckton. No material found in BM(NH) ; a note by Claude 

 Morley, pinned in the space reserved for this species, states " Does not appear to 

 be in coll. Buckton (in Brit. Mus.) CM. hi. 09 ". From the brief description, and the 

 figure, I think it can hardly have been anything but clavata Walker. 



Widely distributed in Europe, as far as U.S.S.R. ; North America. 



Biology. This species is a hyperparasite of aphids through various species of 

 Braconidae Aphidiinae. Ferriere and Voukassovitch (1928 : 28) recorded it from 

 Serbia as a hyperparasite of " Macrosiphonella absinthi Roch " [? =Macrosiphoniella 

 absinthii (L.)] through Ephedrus lacertosus Hal. ; they did not obtain it from any of 

 the other Aphidiine species which they observed during their investigations. Dunn 

 (1949 : 103) recorded it from Aphidiinae attacking Myzus persicae (Sulz.), Macrosi- 

 phum solanifolii (Ashm.) [=euphorbiae (Thomas)], and Anlacorthrum solani (Kalt.); 

 he stated that the Coruna larvae attack the Aphidiinae whilst these are still immature 

 within their aphid host and feed either externally upon their victims, from inside the 

 cocoons of the latter, or internally as endoparasites. They pupate within the 

 cocoons and the adults emerge through jagged holes cut through the dorsal cuticle 

 of the dead aphids. Maud Haviland (1922 : 321-338) described the post-embryonic 

 development of Pachycrepis [=Coruna] clavata, which she obtained in considerable 

 numbers from cocoons of Aphidius ervi Hal., a parasite of Macrosiphum urticae 

 Kalt. [? Microlophium evansi (Theob.)] on Urtica dioica L. She concluded that the 

 Coruna had at least two generations per annum, the exact number not ascertained, 

 and probably dependent on the number of hosts available. In Britain I have 

 taken adults in the field at various dates between May and October. C. clavata 

 has also been recorded in North America as a hyperparasite on Macrosiphum 

 solanifolii (Ashm.) and Chaitophorus spp. (see Peck, 1963). 



PACHYCREPOIDEUS Ashmead 



Pachycrepoideus Ashmead, 1904 : 329. Type-species : P. dubius Ashmead, by monotypy. 



Pachycrepoideus Ashmead ; Schmiedeknecht, 1909 : 371, 372-373. 



Pachycrepoideus Ashmead ; Nikol'skaya, 1952 : 242-243. 



Anisopteromalia Boucek, 1954 : 57- Type-species : A. crassinervis Boucek, by original 



designation. 

 Pachycrepoideus Ashmead ; Delucchi, 19556 : 139-141. 

 Pachycrepoideus Ashmead ; Peck, 1963 : 620. 

 Pachycrepoideus Ashmead ; Peck et al., 1964 : 39. 



Anisopteromalia was placed in synonymy with Pachycrepoideus by Boucek 

 himself (1957 : 165). 



Pachycrepoideus vindemiae (Rondani) 



Encyrtus vindemiae Rondani, 1875 : 145-148, [not seen]. 

 Pteromalus vindemmiae Rondani, 1875 : 3, figs. 4-6 [off-print.] 

 Encyrtus vindemmiae Rondani, 1876 : 84-85 [emendation]. 

 Pachycrepoideus dubius Ashmead, 1904 : 329, 383. 



