138 BRITISH ICHKEUMoKS. [Colpomena. 



with an obsolete testaceous line beneath the radix. Abdomen oblong, 

 black, a little longer than the head and thorax and as broad as the latter ; 

 basal segment sessile, canaliculate, transversely impressed, with the apex 

 of the (5 red ; second to fourth segments transversely impressed and 

 sometimes centrally rufescent. Legs fulvous or rufescent with the anterior 

 coxae and trochanters flavescent ; hind tibiae pale with the apex and a 

 subobsolete mark before the base nigrescent, their tarsi infuscate with 

 the joints basally fulvescent ; hind or posterior coxae sometimes piceous. 

 Wings hyaline with a slight infuscate tinge ; stigma pale, radix and tegu- 

 lae stramineous. Length, 4 — 5 mm. 



Holmgren says the 9 sometimes has the antennae entirely, and coxae 

 mainly, black ; or only the hind coxae black-marked. 



It is found somewhat sparingly among undergroA\th and in grassy 

 places throughout northern and central Europe ; but nothing appears to 

 be known respecting its economy. In Britain, Stephens records T. qtiadri- 

 sctilptiis as " Found, not uncommonly, in the vicinity of London in June." 

 I have a pair of insects, referred to this species by Capron, who took 

 them about Shere in Surrey, but I confess to searching in vain for the 

 generic characters. Neither Bridgman nor Bignell met with this species 

 in their extensive experience and further confirmation of its occurrence 

 is needed with us, though it is recorded under two distinct genera in 

 Marshall's catalogues. 



CLISTOPYGA, Gravenhorst. 

 Gr. I. E. iii (1829). 132. 



Head shortly transverse, narrowed behind the eyes and not buccate ; 

 frons deplanate and laterally impressed ; face transverse, punctate, hardly 

 narrower than the frons and a little elevated longitudinally in the centre ; 

 eyes large, prominent, nude, orbiculate-oval and subentire ; clypeus dis- 

 tinctly discreted, slightly deflexed and broadly rounded apically ; mandi- 

 bles narrow, with the teeth of subequal length ; cheeks of (^ deeply 

 sinuate ; maxillary palpi somewhat elongate and filiform, the labial shorter 

 and stouter. Antennae slender, filiform, not apically attenuate and of 

 normal length ; scape externally excised at the apex ; flagellar joints not 

 apically nodulose, the basal elongate and cylindrical. Thorax longer than 

 high, laterally glabrous and nitidulous, and narrower than the head ; 

 mesonotum ovate, with distinct notauli ; metathorax with the upper areae 

 incomplete and usually sulciform, spiracles circular. Scutellum convex 

 and apically rounded. Abdomen convex, sessile, elongate, subcylindrical, 

 shining, as broad as and twice longer than the thorax ; basal segment 

 subobsoletely carinate, a little longer than broad, very slightly constricted 

 basally, with lateral spiracles before the centre ; central segments quad- 

 rate, and the second to fifth transversely impressed and laterally subtuber- 

 culate ; anus incrassate, with the hypopygium entire, extending nearly to 

 the apex of the abdomen and covering the base of the terebra, which is 

 subreflexed and exserted, about as long as or a little shorter than half the 

 abdomen. Legs normal; tarsal claws not pectinate, of 9 basally lobate; 

 femora stout, the anterior entire ; hind femora and tibiae of equal length 

 with the calcaria short. Wings somewhat narrow, with no areolet ; radial 

 cell lanceolate, nervellus distinct. 



This genus diifers from Rhyssa, Ephialtes, Pitnpla, etc., in the entire two 

 apical ventral segments, lack of areolet and in the shorter terebra ; it is 



