280 BRITISH ICHNEUMONS. 



From the preceding this species differs in having the thorax longer, with 

 the sculpture of the mesonotum deeper, the hind femora are more broadly 

 black, the post-petiole nearly quadrate and the second segment densely 

 striolate at the base. 



Bignell has found this species at the end of August and beginning 

 of September, at Bickleigh, in Devon ; and Piffard has given me the 

 female from Felden, in Herts. ; Bradley, I believe, has also taken it, 

 near Birmingham, in June. On the Continent it occurs in Belgium and 

 Sweden, but has not been bred. 



CENTETERUS, WesjnaeL 

 Wesm. Nouv. Mem. Ac. Brux. 1844, pp. 166 et 176. 



Head buccate, nearly cubical ; cheeks and temples broad ; frons some- 

 what excavate centrally in front ; lower margin of the somewhat narrow 

 and red mandibles not sinuate, their teeth sub-equal ; clypeus transverse, 

 convex, entire, laterally sub-reflexed and distinctly discreted from the face. 

 Flagellum of $ basally attenuate ; scape deeply excised apically. Post- 

 scutellum smooth, with no foveae. Abdomen sub-cylindrical ; segments 

 two to four strongly punctate ; the second narrowed and not impressed 

 basally ; terebra slightly exserted. Coxae mutic. 



Bridgman and Fitch tell us the species of this genus are not uncommon 

 in Britain. 



Table of Species. 



(4). I. Thyridii of (J wanting ; scape of 5 mainly black. 



(3). 2. Frons slightly excavate ; front coxae black... i. MAJOR, IVesm. 



(2). 3. Frons distinctly excavate ; front coxae red ... 3. opprimator, Grav. 



(i). 4. Thyridii oi $ indicated; scape of 5 entirely 



red 2. CONFECTOR, CnjT/. 



I. major, Westtu 



Centetenis major, Wesm. Nouv. IMcJm. Ac. Brux. 1844, p. 177 ; Holmgr. Ichn. Suec. 

 iii. 372 ; Thoms. O. E. xv. 1638 ; Berth. Ann. Soc. Fr. 1896, p. 338, i ? . 



Head black ; palpi and centre of mandibles rufescent. Antennae with 

 scape black ; flagellum of $ tricoloured, of $ basally ferrugineous. Thorax 

 strongly punctate, black ; of $ with pronotum centrally white ; notauli 

 obsolete ; sternum sub-quadrate ; metanotal areae complete ; areola elon- 

 gate-subpentagonal. Abdomen of $ elongate, of ? elongate-fusiform, 

 closely punctate, red with first segment of $ , whole of sixth and seventh, 

 and in $ apex of fifth, black ; post-petiole glabrous ; second segment 

 twice broader at apex than at base ; thyridii wanting. Legs red, with 

 coxae, trochanters, apices of hind femora and tibiae, and base of latter, 

 black. Tegulae and stigma black ; radix white. Length, 8-9 mm. 



From the following ones this species may be known by the black scape 

 and tricoloured flagellum of the ? , and by having in the $ segments two 

 to four entirely red, with no indication of thyridii at the base of the 

 former. 



I know of no definite records of this species with us, though there is no 

 doubt that it occurs here, and I fancy Mr. E. A. Butler took a male near 

 Guildford in August, 1900. It occurs in Belgium, Sweden and Germany, 

 where it has been bred from the pupa of Sesia hylaeiforinis. 



