80 BRITISH ICHNEUMONS. [Pi/ii/'hi 



shortly petiolate ; nervellus intercepting below the centre. Length, 



7-9f mm. 



Gravenhorst says the male is similar in size and outline lo his Ephialtts 

 inanis, but with the abdomen mori> strongly tuberculate, the segments 

 shorter and the front tibiae not arcuate. Tschek, who very fully described 

 this species, points out that thi' 9 i'^ remarkable for its large wings and 

 distinctly tuberculate abdomen, but indicates no line of demarkation from 

 its allies. 



This species occurs uncommonlv in Germany, where Reissig lias 

 bred it from Tinea popuklla in rolled aspen lea\es and from 7 ortrix 

 viridana (Ratz. lib. cit.), Austria and in September in Belgium. It was 

 introduced as British by Marshall in his 1870 Catalogus ; but there is not 

 a single extant record of its more exact occurrence with us, nor havi' 1 

 seen any indigenous examples. 



19. sagax, Hfg. 



Scciiiibiis sagax, Htg. Jahresb. 1838, p. 2G7, J ? . Pimpla sagax, Ratz Ichn. d. 

 Forst. i. 117 et ii, 94 ; Thorns. O. E. xix. 212(; ; cf. lib. cit. viii., 754 el l^>risch. 

 Schr. Nat. Ges. Danz. 1880, p. 113; Schm. Opusc. Ichn. 1102, d ?. 



Head immaculate and hardly broader than the thorax, of (j with the 

 vertex broad and the palpi white. Antennae hardly longer than half the 

 body, infuscate ; of ^ with the scape and pedicellus either partly or 

 wholely white beneath, or with only the apex of the former dull testa- 

 ceous. Thorax black and shining with the radical callosities, at least in 

 (J , white ; metanotum very finely punctate basally, with the areae sub- 

 obsolete ; areola distinct, apically incomplete and narrow throughout ; 

 spiracles circular. Scutellum black. Abdomen narrow, strongly punc- 

 tate, entirely black, of 9 somewhat distinctly tuberculate with the apices 

 of the segments elevated and nitidulous but not broadly glabrous, of J 

 linear with the basal segments longer than broad ; first segment of 9 

 quadrate, of (J hardly half as long again as broad, in both sexes laterally 

 punctate and centrally strongly bicarinate to near its apex ; terebra fully 

 as long as the abdomen. Legs red, with all the coxae and base of the 

 trochanters black ; hind femora, at least apically, infuscate ; hind tibiae 

 and tarsi nigrescent, both basally and the former centrally testaceous ; 

 (J with all the tibiae \\hitish, the front ones strongly arcuate, and their 

 femora broadly emarginate beneath ; apical tarsal joint double length of 

 the penultimate, claws of 9 basally lobate. Wings clear, with the stigma 

 nigrescent and not narrow ; nervellus of 9 oblique and intercepting 

 distinctly below the centre, of J nearly opposite and intercepting in the 

 centre. Length, 3-7 mm. 



The (J has the body linear with the second segment longer than broad, 

 and is at once known from every other species of the genus, excepting 

 P. ventricosa, by its very strongly arcuate front tibiae, combined with 

 the emarginate femora. The 9 is very distinct from P. dctrila in its 

 elongate terebra, and nigrescent liind femora and coxae ; it is said to 

 somewhat resemble P. brevicomis but to be altogether a smaller and more 

 slender insect approaching P. calobata in outline ; I do not, however, 

 know it and it appears to be somewhat ill-defined : Thomson places it 

 near P. deirita with the intimation that the terebra is shorter than half the 

 abdomen ; Ratzeburg, on the other hand, says that in one of his examples 

 the body was three, and the borer two-and-a-half, lines in length. 



