HYMEN OPTEROUS PARASITES OF RHYNCHOTA. 



215 



4. Eurygaster integriceps, Put.* 

 In like manner the latter species also preys upon the eggs of 

 this Pentatomid, which occasionally causes great damage to 

 wheat in Southern Russia, the Caucasus, and Turkestan ; and it 

 is assisted in its beneficial economy by Telenomus simoni, Mayr, 

 T. vassiliewi, Mayr (Verb. z.-b. Ges. 1903, p. 389 ; et Vassiliew, 

 Trav. du Bureau d'Entom.iv. (1904), No. 11), and T. rufiventris, 

 Mayr (Hor. Soc. Ent. Ross, xxxviii. (1907), p. 158). It was 

 reared from the bug's eggs collected in the district of Rostov, on 

 the Don. 



5. Pentatoma. 



A Chalcid, Eulophus pectinicornis, Linn., is doubtfully given 

 (Gaulle, Cat. 109) as parasitic upon an undetermined species of 

 this genus, but the association is unlikely. Its eggs are said to 

 be destroyed by Telenomus alcon, Walk. (Ent. Mag. 1836, p. 353), 

 since this parasite was bred from them at Paris by the Comte de 

 Castleneau. 



6. Holcogaster fibulata, Germ.* 



Telenomus truncatus, Nees, preys upon the eggs of this species, 

 according to Gaulle (Cat. 115). 



7. Eurydema oleraceum f Linn. 



The eggs of Eurydema oleraceum are said by Rondani (Bull. 

 Soc. Ent. Ital. 1874, p. 135 et 1877, p. 187) to be devoured by 

 the Chalcid, Misocoris oophagus, Rond. 



8. Eurydema festivum, Linn. 

 Two other species of Misocoris, namely, Pteromalus oomyzus 

 and P. ovivorus, are also described by Rondani [loc. cit. 1872, 

 pp. 202-3, et 1877, pp. 186-7) from the eggs of both Eurydema 

 festivum and E. omatum.f 



f Several species of the Fossorial Larrince are known to provision their 

 nests with the larvae of Pentatomidce and other Rhynchota, thus: — Astata 

 hoops with Dolycoris baccarum and Eurydema oleraceum — cf. Trans. 

 Ent. Soc. 1836, p. 57 ; A. costce with Odontoscelis and Sciocoris ; A. minor 

 and A. rufipes with Sehirus dubius, and the latter also with Bracluj- 

 pelta aterrima ; A. stigma with Emblethis griseus', and A. tricolor with 

 species of Aphanus. Dinetus pictus preys in like manner upon larvae of 

 Nabis lativentris ; and, doubtfully, Tachysphex upon Pentatoma (cf. 

 Gaulle, Cat. 134). This association cannot, however, be termed parasitism. 



These gentle attentions are sometimes reciprocated ; for Prof. Poulton 

 found the Reduviid Hemipteron, Harpactor iracundus, Scop., to prey upon 



