Sfilbops.] BRITISH ICHNEUMONS. 173 



1. chrysostoma, Grav. 



Phytodietus chrysostonius, Gr. I. E. ii. 940, ? ; Dalla Torre, Wien. Ent. Zeits. 

 1890, p. 139, i ? . Piiupla vetitla, Gr. I. E. iii. 201 ; Tasch Zeits. Ges. Nat. 1863, 

 pp. 63 at 270, cf . P.varicauda, Capron, E. M. M. 1888, p. 218, ?. Stilbops 

 vctula. Thorns. O. E. xiii. 1428 ; Schra. Zool. Jahrb. 1888, p. 530, i ? . Lissonota 

 pallipes, Gr. I. E. iii. 55, i ; cf. Tasch. Zeits. Ges. Nat. 1868, p. 290 et Schm. 

 Opusc. Ichn. 1828. 



A smooth black species with slender legs, broad piceous stigma and 

 red apices to 9 antennae and abdomen. Head as broad as thorax and 

 strongly narrowed behind the eyes ; palpi and a mandibular mark flaves- 

 cent ; cheeks strongly constricted, with genal costa inflexed ; face of (J 

 with long griseous, of 9 ^^'ith silvery, dense pilosity ; clypeus depressed, 

 smooth, deeply foveate and not transverse. Antennae infuscate and some- 

 what explanate towards their apices, of 9 a little longer than half the 

 the bodv and pale red beneath, of ^ nearly as long as the body and 

 stramineous beneath ; basal flagellar joint cylindrical and longer than the 

 second ; 9 ^^ith the oblong-ovate apical joint, and the penultimate, en- 

 tirely testaceous. Thorax black, shining and sparsely pubescent ; meso- 

 sternum not transverse and somewhat finely punctate ; metathoracic areae 

 complete, though in ^ sometimes obsolete ; areola small and emitting 

 the costulae before its centre ; spiracles small and circular. Scutellum 

 black. Abdomen sessile and not uneven, as long as the head and thorax 

 and a little narrower than the latter, with the densely punctate segments 

 apically margined with testaceous or castaneous; basal segment elongate, 

 slightly curved, not canaliculate and gradually a little dilated towards the 

 apex, basally glabrous and foveate with the postpetiole obsoletely margined 

 and the spiracles before the centre ; second with distinct thyridii, of 9 

 quadrate, of ^ longer than broad ; 9 ^vith second to fourth parallel-sided 

 and laterally more or less, with the anus entirely, red ; fifth segment with 

 the venter sometimes acutely prominent ; plica stramineous ; tcrebra one 

 fifth the length of the abdomen. Legs fulvous ; coxae black with the 

 anterior, of S '^t least, apically whitish ; anterior trochanters of J whitish 

 with the hind ones red and basally black, of 9 black with their apices 

 flavous ; hind femora basally more or less broadly black, their tibiae infus- 

 cate with the basal half sometimes obsoletely rufescent; hind tarsi and all 

 the claws infuscate ; calcaria of equal length and one-third the length of 

 the metatarsus. Wings hyaline with the peculiarly broad stigma and the 

 radius piceo-ferrugineous ; radix and tegulae whitish ; areolet irregular, 

 obli(iue and subsessile ; lower angle of the di.scoidal cell acute ; radius 

 basally curved and a third of the apical length ; nervellus intercepting 

 far below the centre. Length, 4^ — 6^ mm. 



This species is said by Gravenhorst to be somewhat allied to Pimpla 

 {Aphanoroptrum) ahdominalis ; he places it next to P. scanica, to which its 



