256 BRITISH ICHNEUMONS. {^Exolytus. 



sub-immaculate antennae, posteriorly immarginate central segments, with 

 their large and high spiracles, the l)road and nilidulous central area and 

 somewhat indistinct lateral areae, with the shape of the dentiparal. 



Tills is an exceedingly al)undanl insect everywhere, from June to Sep- 

 tember, on bushes, Afii^elica flowers, wild carrot and Foenici//uin 7m/^are ; 

 and I have records from (Guernsey and the Land's ImkI to Arran, the Isle 

 of Man and Kilmorc.' It would appear to have been very rarely bred, 

 though Brischke gives various species of Lophyrus and Tenthredo larvae as 

 its hosts in Prussia. 



2. petiolaris, Thorns. 

 Atractodes petiolaris. Thorns. O. E. x. 1020, i ? . 



Head rounded behind the eyes, sub-cubical. Abdomen centrally red, 

 with the basal segment quite straight. All the femora and tibiae red. 

 Length, 4-6 nmi. 



This species is so closely allied to the preceding as to need no detailed 

 description. The posteriorly rounded head with narrower vertex, filiform 

 flagellum, quite straight post-petiole, more sparsely punctate frons and 

 cheeks, and rather smaller size, are quite sufficient to easily distinguish it. 



It has not been hitherto noticed in Britain, though probably common 

 with us ; I have found it upon the flowers of Angelica sylvestris at Foxhall 

 in early September, and the late Mr. Alfred Beaumont gave me specimens 

 taken in August, at Whitby. 



3. scrutator, Hal. 



Atractodes scrutator, Hal. Ann. Nat. Hist. 1839, p. I18, cj 9. A. flavipes,T\iom%. 

 O. E. X. 1021, i ?. Exolyttis laevigatiis,\a.x. i, Holmgr. Sv. Ak. Handl. 1858, n. 8, 

 p. 115. 



Head black with the vertex broad and the mandibles red. Flagellum 

 not very slender, basally attenuate and rufescent, apically filiform. Meta- 

 thoracic areae distinct. Abdomen centrally rufescent ; basal segment 

 margined throughout. Legs entirely pale red, with at most the S hind 

 tarsi and apices of their tibiae infuscate. Lower wings with the median 

 nervure basally almost entirely wanting. Length, 3-5 mm. 



Easily distinguished by the not apically attenuate antennae, laterally 

 margined post-petiole, red coxae and trochanters, but above all by the 

 basally pellucid median nervure of the hind wings. 



Found in England by Francis Walker ; Ireland and the Hebrides 

 (Haliday). Though less abundant than E. /aeviga/us, it is widely dis- 

 tributed ; I have taken it at Lakenheath and Farnham in Suffolk, in June ; 

 and Mr. W. H. Tuck has sent it to me from Aldeburgh and Tostock, in 

 the same county, in September. 



1 Tostock, Wicken Fen, Shere, Harting, Plumstead, Shifnal, Kilmore, King's Cross in Arran, 

 Huntingfield, Charing in Kent, Crookston, New Forest, Coptliorne Common and Greenings near 

 East Grinstead, Norfolk, Bickleigh and Plym bridge in Devon, Land's End, Lastingham in Yorks., 

 Glanvilles Wootton, Hastings District, Guernsey, Essex, Bonhill, Caerketton, Isle of Man, Cornwall, 

 Blackburn. I have taken it in Suffolk at Alderton, Uunwich, Mildenliall, Eye, Felixstowe, Claydon 

 bridge, Bentley Woods, Belstead, Henstead, Finborough Park, Keydon. I liave also found it at 

 Burwell Fen in Cainbs., and at Brockenhurst and Lyndhurst in the New Forest. 



