Pezomachus.'] BRITISH ICHNEUMONS. 225 



pflria iriquetrella (cf. E.M.M. 1889, p. 185) ; Bridgman, in recording the 

 fact, says, "the $ appears to me to be the species Forster described as 

 F. i/isiJiosi/s, and probably P. dysalotiis is tlie same." The former has 

 also been bred (Entom. 1S83, p. 65) by Fletcher from Coleophora vimine- 

 ielhi ; and Bignell bred what Bridgman says (Trans. Ent. Soc. 1883, 

 p. 161) is the $ o{ fattnus from Zvi,^iie/ia filipendulae ; he found it corres- 

 ponded exactly with P. conveniens, Forst. H. albipennis is said by 

 Brischke to have been bred from Psyche viciella. 



P. corruptor is one of our commonest insects, though much more 

 frequent in certain years. Common in Norfolk and bred from Psyche 

 intermediella (Bridgman) ; bred by (iiraud from the earthen nests of 

 Agroeca hrnnnea, Blk. (Laboulbene) ; females at Jjickleigh in August and 

 P. insidiosus in the same locality early in September (Bignell) ; Maldon in 

 Essex (Fitch) ; Battle in Sussex (Vict. Hist.) ; Bramford in autumn (E.M.M. 

 1900, p. 42); Dorsetshire (Entom. 1881, p. 137). In Bridgman's collec- 

 tion is an unnamed female labelled " Bred from Clonus scrof^liiilariae, 

 Horsford, August, 1894, H. J. Thouless " ; this was bred from the larva of 

 the beetle f'r/; Trans. Norf. Soc. 1895, p. 114). Harting and Appledore 

 in Kent, in August and September (Beaumont) ; Shere in Surrey (Capron) ; 

 Guestling in Sussex (Blooinfield) ; Felden in Herts., in July (Piffard) ; 

 Unborough Park and Bungay in Suffolk (Tuck) ; Knowle near Birming- 

 ham (W. Ellis) ; Cornworthy and Barnstaple in Devon (Marshall) ; Lynd- 

 hurst in August (Hamm) ; P. dysalotus found at Exeter (Bignell). I have 

 never taken it during 'hibernation, but it has occurred to me in April, 

 May and June, though commonest in Sei)tember and October, when 

 sometimes ten or a score may be swept from herbage in woods at dusk or 

 upon dull afternoons. It is not restricted to marshy places, though most 

 frefjuent there, and I have usually taken 'it upon the foliage of water plants, 

 though sometimes upon birch, pine and Mercurialis at Bentley Woods, 

 Bramford, Brandon, Dodnash and Ipswich in Suffolk, Horning Ferry in 

 Norfolk, Wicken Fen in Cambs., and Gosfield in Essex ; the male is of 

 much rarer occurrence, usually in October, and I have received it from 

 the New Forest (Miss Chawner), Felden (Piffard), and Abinger Hammer 

 (Butler). The variety faunus has been found by Butler at Guestling and 

 Hollington (cf. Sussex Vict. Hist ) in the Hastings district by J. W. May, 

 and by Bridgman commonly about Norwich (Trans. Ent. Soc. 1881, 

 p. 156; named P. duhitator, cf. lib. cit. 18S3, p. 161 et 1886, p. 341). 

 Bignell is said to have bred this form along with three specimens of 

 P. conveniens, which is doubtless its male, from Zygaena filipendulae. 

 Some doubt remains as to whether the P. dubitator recorded from the 

 neighbourhood of Norwich (Trans. Ent. .Soc. 1882, p. 148) should be also 

 ascribed to this form, which Elliott has recently taken at Scarborough in 

 August. 



44. gracilis, Forst. 



Pezomachus bicolor, var. 6, Gr. I. E. ii. 905. P. gracilis, Forst. Wiegm. Arch. 1850, 

 p. 209, 9 • ^- iininaturus, Forst. lib, cit. p. 225, 9 . ' 



Head narrower than abdomen. Antennae with first joint of fiagellum 

 distinctly longer than .second ; fifth very little longer than wide. Meso- 



I Mr. F. H. Day has taken in the Carlisle district, early in October, 1899, a Pezomachus which 

 Klliott thinks is probably referable to the " form " pulex, Fiirst. This differs from inimaliiriis only 

 in its rather smaller size, in having the head piceoiis and the apical abdominal segments as dark as 

 the preceding. 



Q 



