HYM E NOP T E R US PARASITES OF RHYNCHOTA. 433 



125. Schizoneura ulmi, Linn. 

 Both sexes of Aphidius ulmi, Marsh., have been bred from 

 this species in Devon by Bignell on June 20th, 1884 (Bracon. 

 d'Europ. ii. 577), and Praon exoletus, Nees, is also said to prey 

 on it by Gaulle (Cat. 86). The Chalcid, Decatoma biguttata, 

 Swed., var. variegata, Curt., has been indicated by Dalla Torre 

 (Cat. v. 327) to have been recorded by Rondani, with no refer- 

 ence, from Aphis ulmi, which is the only Hemipteron there inti- 

 mated, among a dozen Cynipidce. 



126. Schizoneura aquatica, ?auct.* 

 Encyrtus schizoneura has been described from this species by 

 Ashmead (Proc. Amer. Ent. Soc. 1885, p. xvi.). 



127. Pemphigus bursarius, Htg. 



Buckton (Mon. Aph. iii. 119) says that this species is preyed 

 upon by an undetermined " aphidiphagous ichneumon." 



128. Pemphigus Jilaginis, Fonsc. 



Allotria longicornis, Htg., was bred from Pemphigus gnaphalii, 

 Kit., by Kirchner (Cat. 31), and Cameron (Phyt. Hym. iii. 233) 

 tells us that Hartig bred the same hyperparasite from — (?) an 

 Aphid concealed in — galls of Nematus gallicola (Pontania proximo,, 

 Lep.). 



129. Pemphigus bumelice, Schr. 



This British (cf. E. M. M. 1898, p. 6) species is given by 

 Cameron (Phyt. Hym. iii. 233), upon Kaltenbach's authority, as 

 one of the hosts of Allotria (Pezophycta) brachyptera, Htg. 



130. Pemphigus fraxinifolia, ? auct.* 131. Glyphina 

 eragrostidis, ? auct.* 

 In America, Howard (Revis. Aphel. N. Amer. 24) says these 

 species are attacked by Aphelinus mali, Halde. 



132. Chermes. 



Howard tells us (I. c. p. 38) that an American species of this 

 genus is destroyed by Coccophagus scutatus, Howd. The insects 

 given under this genus by Giraud belong to the Coccidce. 



. 133. Chermes corticalis, Kalt. 

 Probably both the Chermes piccte, from which Ratzeburg 

 records his Pteromalus coccorum, and the Chermes strobi, from 

 Zool. 4th ser. vol. XIII., November, 1909. 2 L 



