l86 BRITISH ICHNEUMONS. {Pezomachns. 



The typical form of the 9 appears to have a transverse black mark 

 nearly in the centre of segments three to five, not reaching the sides ; 

 sometimes these are indistinct, reduced to spots or, more rarely, the third 

 is almost entirely black and the second also black-marked, while the mark 

 on the fifth is sometimes obsolete. The $ is similar to P. vulpinus, 

 but the antennae are longer, the abdomen narrower and more strongly 

 punctate. 



The variety N'eesi differs only in its less prominent apophyses, less 

 parallel-sided post-petiole, and in having the whole abdomen from the 

 second segment mainly piceous. Forster says its habitus and sculpture 

 are exactly the same and the two stand apart. The sub-variety of Bridg- 

 man has the antennae twenty- (not twenty- two) jointed, with their base 

 usually darker ; the basal segment alone is red, with the rest purplish- 

 brown and the incisures faintly rufescent, and the terebra longer. 



P. aquisgranensis appears to be very rare in Britain and I have heard of 

 no records. The only examples I have seen are nine, which I took among 

 Myrmica mgi/iodis and Af. scabrinodis in long ground moss in the Bentley 

 Woods, near Ipswich, on 23rd March, 1895, and one in the same locality 

 and situation early in the following February. The variety N'eesi has been 

 taken by Piffard at Felden in Herts., Capron at Shere in Surrey, and 

 W. Ellis has given it to me from near London, in 1882. 



3. Kiesenwetteri, Forst. 



Pezomachus Kiesenwetteri, Forst. Wiegm. Arch. 1850, p. 133, ? ; Thorns. O. E. x. 

 1004, 6 ? • Pezomachus bellicosus, Forst. Wiegm. Arch. 1850, p. 141 ; Voll. Pinac. 

 pi. xii. fig. 4, 9 . P. Deheyii, Forst. Wiegm. Arch. 1850, p. 142, ?. (?) P. veiiatorius, 

 Forst. lib. cit. p. 219, ? . 



9 . Head with the vertex broad ; cheeks buccate, with no sulcus and 

 their costa inflexed ; clypeus finely but not closely punctate, apically 

 marginate and sub-truncate. Antennae with the basal flagellar joint 

 slightly shorter than the second, but not shorter than the scape ; the fifth 

 sub-quadrate. Metanotum not strongly convex, with the petiolar area 

 impressed but ill-defined, very short and not basally costate ; apophyses 

 wanting. Abdomen finely reticulate, very diffusely pubescent and 

 obsoletely punctate, closest on the second segment, which, like the third, 

 bears broad epipleurae with spiracles far from the margins ; basal segment 

 stout with tubercles not prominent, and the post-petiole broad and 

 convex ; terebra almost longer than the basal segment. Calcaria elongate. 



Head black ; antennae red, becoming infuscate from about the centre. 

 Thorax and abdomen red, the latter with the third segment centrally and 

 the following, except at their margins, piceous, as also is the terebra. 

 Legs entirely red, or with the apical tarsal joint and the claws piceous. 



$. Winged. Cheeks buccate and dull ; mandibles slightly tuberculate. 

 Metathorax rugosely punctate with notauli elongate and the areola and 

 lateral costae not distinct. Wings with the stigma broad, radius emitted 

 beyond its centre ; nervellus antefurcal ; discoidal cell acute-angled at its 

 apex. 



Black with the base of antennae and legs flavous. Length, 4-5 mm. 



P. bellicosus appears to be nothing but a somewhat more fully developed 

 form of this species bearing a trace of a scutellum and having the meta- 



