192 BRITISH ICHNEUMONS. \^Pezoviachiis. 



than the second ; the fifth imperceptibly longer than broad. Thorax 

 short ; niesonotum deplanate with no notauli ; metathorax convex and 

 not longer than the sub -vertical petiolar area, whose basal costa is not 

 strong though distinct throughout, with very small and obtuse apophyses. 

 Scutellum not indicated. Abdomen closely punctate and pubescent ; basal 

 segment not long and evenly explanate to the somewhat broad apex, its 

 spiracles not prominent ; terebra fully as long as the basal segment. Legs 

 not slender. 



Head black ; antennae piceous, with the three or four basal flagellar 

 joints rufescent. Thorax red, with piceous markings above the hind coxae. 

 Abdomen with the basal segment red, the second piceous with all the 

 margins narrowly red, the remainder piceous with fine red apical margins. 

 Legs clear red, with the apical tarsal joint infuscate. Length, ■t,\ nim. 



This species differs from P. bicolor in the weaker metathoracic costa, 

 the absence of the scutellum and in the non-projecting petiolar spiracles. 

 From P. circiiificinctus, Forst., it may be known by the deplanate nieso- 

 notum, by the distinct metathoracic costa and by the more nitidulous 

 abdomen. It superficially resembles P. formicariiis in shape and colora- 

 tion, but the antennae are longer and more slender, with the second 

 flagellar joint shorter than the first, the petiolar area is basally costate and 

 the basal segment is much stouter. 



I possess a single example taken by Piffard at Felden in Herts , and 

 have seen two others captured at Whauphill in Wigtonshire, in April, by 

 J. G. Gordon. 



[? c?. Densely and finely reticulate and somewhat dull. Head 

 transverse, contracted behind the eyes, cheeks not buccate ; face slightly 

 protuberant, transverse ; inner orbits parallel ; clypeus discreted and 

 apically rounded ; mandibular teeth sub-equal in length. Antennae as 

 long as the body, with the two basal flagellar joints of about equal length 

 and four times longer than broad. Thorax with notauli indistinct ; meta- 

 notum about as long as petiolar area, with two transverse curved costae, 

 but no areola. Basal segment slender and elongate, post-petiole a third 

 longer than broad, spiracles prominent ; second a little longer than broad. 

 Areolet imperfect ; nervellus nearly antefurcal, intercepted one-third from 

 bottom ; nervelet wanting. 



Black, with the mouth, base of antennae and legs red ; pronotum bino- 

 tated with red ; three basal segments red, first laterally to centre, third 

 transversely fasciated in the centre with, piceous ; remainder sometimes 

 apically pale ; stigma infuscate. Length, 4 mm. 



I tentatively place Bridgman's c^ here for lack of a more certified 

 position; it is evidently that of one of the red-bodied Pezomachi ; and 

 two examples v/ere taken near Norwich, in July.] 



g. aemulus, Forst. 



Pezomachiis aenniltis, Forst. Wiegm. Arch. 1850, p. 146, 9 ; cf. Bridg. Trans. Ent. 

 Soc. 1SS7. p. 365. 



Head dull and finely pilose. Basal flagellar joint elongate and not 

 longer than the second ; the fifth hardly longer than broad. Thorax com- 

 paratively short, with the meso- and meta-notum of equal length ; notauli 

 usually strong and anteriorly confluent ; petiolar area sub-oblique, its basal 



