( 309 ) 



ON THE HYMENOPTEEOUS PARASITES OF 



RHYNCHOTA. 



By Claude Morley, F.E.S., F.Z.S. 



(Continued from p. 225.) 



49. Sipthonophora pelargonii, Kalt. 

 Aphidius rufus, Gour., is recorded from Siphonophora malvce 

 by Gaulle (Cat. 87, though not by Dours) ; and in all proba- 

 bility the Aphid upon Pelargonium, from which Dr. Giraud bred 

 (Ann. Soc. Fr. 1877, p. 416) his Aphidius pelargonii, was the 

 same species. 



50. Siphonophora lactucce, Kalt. 

 As direct parasites of this species, Marshall has bred both 

 Praon abjectum, Hal., and his own Aphidius sonchi ; the latter 

 was also raised from it by Bignell in Devon, on June 30th, 1884, 

 together with the hyperparasitic Cynipid, Allotria m%nuta t Htg., 

 and the hyperparasitic Proctotrypid, Lygocerm glabriculus, Thorns. 

 (Marsh. B. d'Europ. ii. 534 et 586 ; et Bignell, Trans. Dev. Ass. 

 1901, p. 688). Gaulle follows Dalla Torre (Cat. v. 427) in giving 

 My mar pulchellas, Curt., as parasitic upon — (?) the eggs of — this 

 species ; the latter ascribes the observation to Rondani, but gives 

 no reference. It is, too, in the last instance, uncertain if the 

 host were Siphonophora lactucce, Kalt., Rhopalosiphum lactucce, 

 Pass., or Aphis lactucce, Fabr. (= Siphonophora tussilaginis, Walk.). 



51. Siphonophora rubi, Kalt. 

 This species is indicated by Marshall (B. d'Europ. ii. 574-6) 

 as the host of Aphidius avence, Hal., and of A. ervi, Hal. Bignell 

 adds (Trans. Dev. Ass. 1901, p. 688) that he bred A. rosce, Hal., 

 as commonly from this species as from S. rosce throughout the 

 summer in Devonshire.! Gaulle adds (Cat. 112) that " Myzus " 



f Buckton (Mon. Aph. ii. 157) differs from Marshall in considering that 

 the parasites of Aphididce " do not seem to be confined to preying on single 

 specific forms," though the latter merely circumscribes their range, and, 

 while considering the majority restricted to a single host-species (which 



