256 BRITISH ICHNEUMONS. [ Perilissus 

years’ constant collecting there), Mildenhall, Brandon, Herringswell Fen, 
Henstead Marsh; in Cambs. at Chippenham Fen; in Norfolk in Sur- 
lingham Marsh; and in the New Forest at Matley Bog. On 14th of 
July, 1898, I took a female at 10.45 p.m. flying around an electric arc 
lamp in Ipswich, evidently attracted by the light. It is very widely dis- 
tributed with us, as the following localities will show :—Nunton, Govilon 
and Botusfleming (Marshall); Lastingham in Yorks (Roebuck) ; Whitby 
(Beaumont); Lepton near Huddersfield (Porritt, Yorks. Nat. 1882, p. 57) ; 
Lands End (Marquand) ; very common in Norfolk (Bridgman), Kings 
Lynn, Norfolk (Atmore); Bolt Head, Devon (Bignell); Glanvilles 
Wootton, Dorset, common (Dale); Norbury, Surrey, roth June (Brunetti) ; 
several at Wimbledon, June, 1910 (Stenton); Shere (Capron) ; Sander- 
stead, Surrey (Champion); St. Issey, Cornwall (Davies) ; Weymouth 
(Richardson) ; Shotover, Oxford, zoth Sept., 1902 (Hamm); Felden, 
Herts (Piffard); Cannock Chase (Tomlin); Guestling, Sussex (Bloom- 
field) ; Hastings (Ksam); Much Markle, Hereford, 27th May, 1902 (Col. 
Yerbury) ; Banchory in Kincardine, in Sept. 1910 (Elliott), and Bishop- 
ton in early July, 1899 (Dalglish). A long series in Mus. brit. was named 
by Gravenhorst, Desvignes and Stephens, who records this species 
correctly from London, Netley, Combe [N.B. This is his MS. label C4. ] 
and Darenth Woods in June. 
2. lutescens, Holmegr. 
Perilissus lutescens, Holmer. Sv. Ak. Handl. 1855, p. 125, cf. p. 379; Brischke. 
Schr. Phys. Ges. Kénig. 1871, p.71; Schr. Nat. Ges. Danz. 1878, p.73,¢ 9. P. 
(Spanotecnus) lutescens, Thoms. O. E. ix. 212. 
A distinctly shining and very finely punctate species with the whole 
abdomen, except basally, and legs fulvous. Head black, posteriorly 
broad with apex of clypeus, the mouth and base of antennae beneath, 
pale. Thorax immaculate black, metanotal areae complete and costulae 
strong. Abdomen clear fulvous, with only the first segment to centre of 
postpetiole black; basal segment narrow with obsolete discal sulcus. 
Legs immaculate fulvous, very rarely with apices of hind tibiae infuscate. 
Wings with stigma broad and usually nearly black; nervellus intercepted 
distinctly above its centre. Length, 5—6 mm. 
Its colouration and size render it distinct in the present genus; but it is 
very liable to be confused with Luryproctus alomator, from which it differs 
in its posteriorly longer head, very distinct metanotal costulae, broader 
areola, the structure of the basal segment which is mainly black, and 
especially in the distinctly supracentral interception of the nervellus. 
It is only recorded from Sweden, France and Prussia, where Brischke 
raised it from larvae of the terribly destructive Black-Jack, A‘halia spinarum, 
and subsequently from those of Wematus Erichsont. It was first intro- 
duced as British by Bridgman (Trans. Ent. Soc. 1889, p. 432) on the 
strength of a ¢ captured by Bignell on 3rd of May (or, more probably, 
as given by the latter [Trans. Devon. Assoc. 1898, p. 496] August), 1886. 
It is probably not very rare in woods, however, since there are several in 
Mus. Brit., found by Desvignes and Rev. T. A. Marshall at Milford Haven 
and Cornworthy in Devon; and 1 swept a couple of females from a bed of 
Sculellaria galericulata among alders at Matley Bog, in the New Forest 
on 23rd August, 1901, 
