Pezomachus.'l BRITISH ICHNEUMONS. 185 



rugosely, punctate : areola and lateral costae indistinct, and the petiolar 

 area elongate. Abdomen black, sometimes fasciated with red ; fusiform- 

 cylindrical, closely and evenly punctate throughout ; spiracles of second 

 segment close to the margins. Coxae black ; femora and tibiae red, the 

 latter sometimes basally or entirely black. Wings not large, with the basal 

 nervure sub-vertical ; stigma not broad, emitting the radius nearly from 

 its centre, apical abscissa of the latter but little longer than the basal ; 

 nervellus strongly antefurcal. Length, 3-5 mm. 



A very distinct species, differing from P. iiivrmcci/ii/s, Thonis., in the 

 puncturation and colour of the abdomen, deplanate oral costa, etc. 



In introducing this species as British (Trans. Ent. Soc. 1887, p. 365), 

 Bridgman says, " Mr. G. C. Champion has taken a single female Pezo- 

 mai/ii/s, which I believe to be this species, at Caterham." Mr. Albert 

 Piffard has confirmed its claim to inclusion in our fauna by the capture of 

 a female, which he has kindly presented to me, at Feldcn near Boxmoor, 

 in Herts. 



2. aquisgranensis, Forsf. 



Pezomachus aqiiisgranensis, Forst. Wiegm. Arch. 1850, p. 117, 9 ; Tlioms. O. E. x. 

 looi, (J 9 . P. qiiadrifasciattis, Kriech. Ent. Nachr. xxv. p. 297, 9- Var. P. Neesii, 

 Forst. Wiegm. Arch. 1850, p. 118; Voll. Pinac. pi. xii. hg. i, 9; var. Bridg. Trans. 

 Ent. Soc. 1SS7, p. 365, 9 . 



9 . Head dull, somewhat finely, strongly and closely punctate ; clypeus 

 with deep basal foveae and shallow, oblique lateral impressions, its apex 

 not margined centrally ; genal sulcus wanting. Antennae stout and 

 apically attenuate ; basal flagellar joint shorter than the second and not 

 longer than the sub-cylindrical scape ; the fifth hardly longer than broad. 

 Thorax with the meso- and meta-notum of equal length ; petiolar area 

 strongly e.xcavate with the basal costa sub-obsolete and apoi)hyses strong. 

 Abdomen convex, strongly but only moderately and uniformly punctured 

 throughout, with the pubescence somewhat elongate ; basal segment with 

 only slight tubercles, placed behind the centre ; post-petiole not transverse, 

 strongly punctate, with its lateral margins parallel and the apex not broad ; 

 the second with spiracles far from the margin and its apical incisure very 

 distinct. Legs stout and calcaria long. Terebra either scarcely exserted 

 or at least not more than half the length of the basal segment. 



Head black, with palpi flavous and mandibles red. Antennae rufo- 

 testaceous to their centre and thence piceous, with the scape darker. 

 Thorax and abdomen red, the latter with transverse black bands, which 

 do not reach the lateral margins, in the centre of the third, and nearer the 

 base on the fourth and fifth, segments. Legs pale-red with the apical 

 tarsal joint darker. 



$ . Winged. Metathorax strongly rugose ; areola and lateral costae 

 indistinct ; petiolar area long. Spiracles of the second segment not far 

 from the lateral margin. Wings short ; basal nervure nearly vertical ; apex 

 of the radius a little longer than the base ; first recurrent antefurcal. 



Head and thorax black. Abdomen with the first segment black, or red 

 apically ; second and third entirely red ; the fourth black or with the base 

 red. Femora red or with black markings ; tibiae red and coxae black. 

 Length, 3^-5 mm. 



