Pezomachus.\ BRITISH ICHNEUMONS. 219 



Abdomen piceous with the basal segment apically, and the three following 

 laterally, translucent red ; terebra with its spicula Havous and sheaths 

 ferrugineous. Legs flavous, with the a[)ical tarsal joint only slightly 

 infuscate. 



$. Head not contracted behind the eyes, black; clypcus discreted, 

 rufescent ; palpi dull flavidous ; mandibles testaceous, apically piceous. 

 Antennae piceous with the three basal joints clear fulvous, and the fourth 

 basally pale ; first and second flagellar joints sub-equal in length ; the 

 fifth about twice longer than broad. Metathorax somewhat elongate ; 

 petiolar area short and nearly vertical, its basal costa and apoi)hyses dis- 

 tinct ; colour of thorax variable, from testaceous with the notum and 

 pleurae darker to dark brown-red with the notum red ; meso- always 

 lighter than the meta-thorax. Scutellum distinctly discreted. Abdomen 

 with normal puncturation and pubescence ; basal segment varies in colour 

 from pale to dark testaceous, post-petiole sub-quadrate, spiracles more 

 j)rominent in the darker examples ; fourth segment either entirely rufo- 

 testaceous or brown-red with paler sides and apex ; remainder dark 

 ferrugineous or black, the third sometimes laterally paler. Legs clear tes- 

 taceous ; hind femora and tibiae more or less infuscate. Wings entirely 

 wanting. Length, 4-6 mm. 



Bred from Chelonia villica, hyperparasitic through Apanteks rujicoxis, 

 Marshall, 3rd July, 1890. A hundred and seventy-seven larvae of the 

 Apanteles emerged from the single caterpillar of C. villica^ from which 

 developed sixty-four male and one female Hemiteles fulvipes, together with 

 six males and two females of P. tristis (cf. Bignell, Trans. Devon. Assoc. 

 1898, p. 474). 



41. carnifex, Forst. 



Pezoiiiachtts larin/ex, Forst. \Viey;iii. Arch. 1S50, p. 148 (supra), 9- P. mfii/ns, 

 Forst. ///'. C7t. p. 148 (infra), 9 ; 'I'lioms. O. E x. 1009, 6 9- P- liitesccns, Forst. 

 Wiegm. Arch. 1 850, p. 161 ; P. helvoliis, p. 165 ; P. einaniJiis, p. 166 ; P. siilulits, 

 p. 167 ; P. juvenilis, p. 16S ; P. debilis, p. 168 ; P. uiiicolor, p. 177 ; P. veniislus, 

 p. iSi ; P. consobriittis, p. 181 ; P. livLius, p. 182 ; P. languidus, p. 183 ; P. ciirieiis, 

 p. I S3, 9. P- siibtilis, Forst. lib. cit. 185 1, p. 33, i. Hcniiinachus aiinulicornis, 

 Bridg. Trans. Ent. Soc. 1883, p. 160, <J . 



9 . Frons dull and finely reticulate ; face broader below ; cheeks 

 smooth, with the costa continuous and sulcus deeply impressed ; man- 

 dibles hardly tuberculate basally ; clypeus elevated in front and apically 

 rounded. Antennae with the basal flagellar joint more or less distinctly 

 longer than the second, and half as long again as the scape ; the fifth 

 somewhat longer than broad. Mesothorax longer than the metanotum in 

 the type form, but usually about equal in length ; petiolar area well 

 defined, smooth and shining, with its basal costa distinct though variable 

 in development ; mesonotum sometimes with a depression in front, and 

 metanotum longitudinally imjjressed ; acetabula occupying nearly the 

 whole mesosternum. Scutellum usually indicated by a tubercle or trans- 

 verse callosity. Abdomen closely punctate and pubescent at the base, 

 though often more diffusely towards the apex ; petiole elongate, post- 

 petiole not transverse, with the spiracles only slightly projecting ; terebra 

 as long as, or shorter than, the basal segment. Legs normal, anterior 

 tibiae not inflated. 



