HYMKNOPTEROUS PARASITES OF RHYNCHOTA. 481 



114. Callipterus betularius, Kalt. 

 Marshall knew but a single female of his Trioxys betake, and 

 this had been bred from the present host by Bignell in Devon- 

 shire (Br aeon. d'Europ. ii. 554). 



115. Callipterus coryli, Goet. 



The Chalcid, Myina flava, is said by Buckton (Mon. Aph. ii. 

 156 et iii. 18) to oviposit freely in the larvae of both this and the 

 following species. Cameron (Phyt. Hym. iii. 2331, following 

 Kaltenbach) records Allotria brachyptera, Htg., from an Aphid 

 on Fraxinus, which is probably referable to the present species, 

 since it is the only one mentioned by Buckton as feeding 

 on ash. 



116. Callipterus quercus, Kalt. 



The common and polyphagous Praon volncre, Hal., is said by 

 Marsh. (Bracon. d'Europ. ii. 540) to prey upon this common 

 species, together probably with its hyperparasites, Allotria ull- 

 richi, Isocrates vulgaris, and Lamprotati. Bignell also bred in 

 Devon the unique specimen of Aphidius callipteri, Marsh. {I. c. 

 610) from this host. Giraud bred his Tetrastichus aphidum from 

 an " Aphis sur Quercus " (Ann. Soc. Fr. 1877, p. 432), and Myina 

 flava also attacks it, as noticed under the last species. 



117. Pterocallis alni, Fabr. 

 This abundant species is said by Kieffer to be parasitised by 

 his new Alloxysta transiens. 



118. Pterocallis juglandicola, Kalt 

 In the middle of September, 1907, at Sibton Abbey in Suffolk, 

 I took a large winged female of this species, whose dead body 

 was attached to the cocoon of an already emerged species of 

 Praon. 



119. Pterocallis tilics, Linn. 

 Praon flavinode, Hal., a rare species with us and unknown on 

 the Continent, has been bred from this species in Devonshire by 

 Bignell on Oct. 1st, 1883 (Trans. Devon. Ass. 1901, p. 688) ; its 

 hyperparasites may be Kieffer's new Allotria albipes, which he 

 records from Aphis tilice, and the Chalcid, Myina flava, of whose 

 parasitism upon the present host Buckton (Mon. Aph. iii. 18) 

 was doubtful. 



