282 BRITISH ICHNEUMONS. 



ORONOTUS, JVesmael. 

 Wesm. Nouv. Mem. Ac. Brux. 1844, pp. 166 et 213. 



Head strongly punctate, narrowed behind the eyes ; cheeks not buccate ; 

 vertex somewhat broad ; clypeus a Httle convex, glabrous, apically entire ; 

 lower mandibular tooth short and strongly inflexed. Antennae slender, 

 apically sub-attenuate ; post-annellus linear. Thorax strongly punctate 

 and anteriorly elevated ; metathorax declived throughout, apically sub- 

 caudately produced beyond the insertion of the hind coxae. Abdomen 

 narrow ; basal third of second segment sub-obsoletely impressed and 

 densely striolate throughout, the thyridii placed a little before its centre. 

 Legs slender ; hind coxae of ? with a minute and often obsolete sub- 

 apical tooth beneath. 



Wesmael says the form of the thorax resembles that of the Ophionid 

 genus Anomalon ; Holmgren failed to discover any excrescence of the ? 

 hind coxae ; and Thomson tells us the sculpture of the second segment, 

 etc., most closely allies it with Diadromus. 



I. binotatus, Grav. 



Phygadenon binotatus, Gr. I. E. ii. 721; Tasch. Zeits. Ges. Nat. 1865, p. 51, (J. 

 Oroiiotus binotatus, Holmgr. Ichn. Suec. iii. 356; Thorns. O. E. xv. 1626; Berth. Ann. 

 Soc. Fr. 1896, p. 387, $ 9 . 0. coarctatiis, Wesm. Nouv. Mem. Ac. Brux. 1844, p. 214; 

 S. V. Veil. Pinac. pi. xxxvi. ff. 8 et 9, (J ? . 



Head broad, transverse, black ; face and frons confluently punctate ; 

 palpi and mandibles pale. Antennae of ? tricoloured, of $ fulvous with 

 the apices infuscate. Thorax black ; areola elongate and very narrow, 

 apically entire ; petiolar area short, not concave. Abdomen black with 

 griseous pubescence, of ? elongate -subfusiform ; segments one to four 

 fulvous ; the second basally constricted and, in $ , with two black dots 

 before its apex ; petiole four times longer than the post-petiole ; anus 

 acute, terebra slightly exserted. Legs fulvous ; anterior coxae and tro- 

 chanters stramineous ; apices of hind femora and tibiae, and base of latter, 

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



Van VoUenhoven {loc. cit.) remarks upon the resemblance of this slender 

 species to the genera Limerodes and Anomalon. 



This species is said to be not uncommon on the Continent, where it is 

 found on heaths and supposed to be parasitic upon some Leucanid larva, 

 feeding on down grasses and sheltering by day at their roots ; Gravenhorst 

 took it in a grassy field in early August. It appears to be extremely rare 

 in Britain, whence I know of no indigenous records, though it has stood 

 in our catalogues since 1870. 



ISCHNUS, Gravenhorst. 



Gr. I. E. i. 63S {1829) ; Wesm. Nouv. M^m. Ac. Brux. 1844, p. 215. 



Head stout, broader than thorax, strongly punctate ; vertex broad ; 

 cheeks sub-buccate, genal costa sub-dentate ; mandibles strongly attenuate 

 and arcuate apically, their lower tooth sub-obsolete ; clypeus large, smooth, 

 convex, apically sub-truncate. Antennae long and slender, apically attenu- 

 ate ; scape short and apically deeply excised ; post-annellus linear. Thorax 



