242 BRITISH ICHNEUMONS. [Phytodiaehis. 



but the conformation of the tarsal claws and broad areolet are quite dif- 

 ferent. Like P. coryphaeus it is easily known, says Holmgren, from P. 

 obscurus by the cheeks being broader than the basal width of the mandi- 

 bles. Z. pecioralis, which is a c^' form of the present species with the 

 areolet minute or obsolete, the antennae subflavidous beneath, the anus 

 and pro- and meta-thorax immaculate, is recorded by Gravenhorst as 

 taken by Hope at Netlev in Shropshire. 



The synonymy of this genus has become considerably involved and 

 after protracted research, I am very strongly of the opinion that J. R. 

 Forster's species of 1771 is entirely synonymous with Gravenhorst's 

 P. segDiftifator; Schmiedeknecht in 1907 says that P. coryphaeus differs 

 from the latter in nothing but colour, and that P. segmcntator, is the com- 

 monest species throughout the palaearctic region. This leads me to 

 suspect that the true P. segmentator, described above, is unknown to him, 

 for it very materially differs from P. coryphaeus, as I ha\-e indicated under 

 the latter species. 



Stephens, in his supplement, tells us P. seg})ie?ilator has been found in 

 the vicinity of London, but appears rare ; Bignell says he bred it in south 

 Devonshire on 15th January from presumably forced Peronea hastiana and 

 in the middle of May from Tortri.x viridana ; Rridgman records it from 

 Norwich, Wroxham and Lynn, in Norfolk, where Atmore, he adds, has 

 raised it from Tortrix decretana; ^Marshall ( Ent, Annual, 1874, p. 125) 

 raised it from Notodonta Chaonia ; and Harwood includes it in his Essex 

 list. Brischke, who ( Schr. Nat. Ges. Danz. 1882, p. 126) gives some 

 account of its economy, tells us it also prevs upon Grapholitha roborajia, 

 Tortrix ribeatm, T. laeTigana and Cidaria ga/iaria ; and to these are added 

 Paedisca sordidatia by Sang (Entom. 1881, p. 141), Phoxoptetyx jMitter- 

 bacheriana b)' Fletcher [I.e. 1883, p. 67), 7oxocampa craccae and Drymonia 

 chaonia (Buckler). Probablv the majoritv, if not all, of these records 

 refer to P. cojyphaeus, for I find this species under both names in Capron's 

 collection from Shere in Surrey. My own experience is that P. polyzonias 

 is a distinctly uncommon species in Britain, and I possess but five exam- 

 ples, comprising two females taken at Courten in L'eland by Beaumont on 

 8th Septembr, 1893, and at Lynton in Devonshire by Stanley Edwards in 

 1890 ; and three males of which one was captured by Bloomfield at Guest- 

 ling in Sussex, as recorded by me in the Victoria History of that county, 

 one in the New Forest by Miss Chawner and the last I swept from a 

 hedge-bank in a lane at Dunwich in Suffolk on 7th August, 1900. I con- 

 sider the insect recorded under the name Pel/astes polyzonias ( Ent. Mag. 

 1835, p. 43) as more probably synonymous with Aletopius micratorius. 

 Fab., than the present species, with which it is erroneously given as iden- 

 tical in Stephens' Cat. 350. 



