BRITISH ICHNEUMONS. 23I 



somewhat narrowed apically, black, with the four basal segments more or 

 less red ; the last two narrowly white-margined ; gastrocaeli and thyridii 

 large, the former sub-circular. Legs normal, red ; femora stout ; coxae, 

 trochanters, hind tarsi and apices of their tibiae, black. Wings sub- 

 hyaline ; stigma nigrescent, tegulae white-marked, radix pale ; areolet 

 coalesced above. Length, 7-8 mm. ? . 



This ? differs from P. orbitalis in its finer puncturation, stouter legs, 

 obsolete costulae, smaller and more superficial gastrocaeli and entire 

 petiolar area. 



I give the above description of the P. pallidens, since Thomson says, 

 " Forsitan P. pallidentis mas," and again, " Kanske honan till denna art iir 

 varietetan i af P. pallidens." He, however, describes a c? of Z^. pallidens, 

 which was overlooked or not accepted by Berthoumieu, as differing from 

 P. tricingulalus in having the external orbits centrally, nearly the whole of 

 the internal, and a dot at the vertex, as well as the flagellum centrally 

 above, and an elongated line before the radix, white, with the hind tarsi 

 basally fuscous ; but he makes no mention of its structure, which is, pre- 

 sumably, identical with that of the ? .] 



P. iricnigu/a/iis is recorded from Piedmont, Germany, Russia and 

 Sweden ; P. pallidens only from Sweden and Holstein. The former is 

 recorded by Stephens, from about London, in June, and Bignell has bred 

 it, on loth June, from Eiipitlucia pulchellata^ in south Devonshire ; Essex. 



13. decipiens, ]Vesm. 



Platylahiis dccipieus, Wesm. Bui. Ac. Brux. 1S4S, p. 310, ? ; lib. cit. 1S53, p. 319 ; 

 Holmgr. Ichn. Siiec. ii. 325; Thorns. O. E. xix. 2111 ; Berth. Ann. Soc. Fr. 1896, 

 p. 324, i ? . Ischniis Minai, Stephani, Nat, Sicil. 1886, $ ? . 



Head triangular anteriorly, strongly narrowed behind the eyes ; frons 

 closely punctate, scrobes small and lunate ; apices of cheeks, frontal and a 

 trace at the external orbits, white ; facial orbits of c? also narrowly white. 

 Antennae slender, slightly dilated beyond the centre ; white-banded in 

 both sexes, though often obsoletely so in male. Thorax immaculate, 

 somewhat shining, black ; areola transverse, apically emarginate ; costulae 

 obsolete ; apophyses small and distinct ; spiracles oval. Scutellum and 

 sometimes post-scutellum white ; former laterally carinate at the base only. 

 Abdomen with the four basal segments somewhat strongly punctate, red ; 

 the apical three or four black, the last only narrowly red- or white- 

 margined ; petiole broad; post-petiole bicarinate, very finely scabriculous, 

 apically glabrous ; gastrocaeli narrow, transverse and deeply impressed, the 

 sub-rugose intervening space being narrower than the centre of post- 

 petiole ; terebra shortly exserted. Legs normal, black ; the anterior, and 

 ba.ses of hind, femora and tibiae red. Wings sub-hyaline ; stigma and 

 tegulae nigrescent, latter often pale-marked ; areolet coalesced above. 

 Length, 10 mm. 



Bignell ca])tured examples of this species, which was not previously 

 known as British, at Plym Bridge, at the end of May ; and at Bickleigh, 

 towards the end of July ; and Jiradley has given me a specimen which he 

 took at Birmingham. Bankes has given me several examples, bred in 

 South Devon, in July, from Anticlea si/inata, Hb. It has also been bred 

 from Siona dea/lnila, and occurs in central Europe, France and Sweden. 



T 



