14 BRITISH ICHNEUMONS. 



Table of Species. 



(2). I. Metanotum with dcnliparal areae regularly 

 transversely costate ; second and third 

 ventral segments centrally plicate i. LUTORlUS, Fab. 



(i). 2. IVIetanotimi with dentiparal areae intricately 

 confusedly costate ; second ventral seg- 

 ment only bearing a fold 2. exaltatorius, Panz. 



I. lutorius, Fab. 



Ichmwnon lulorius. Fab. M. I. i. 262 ; Piez. 64 ; cf. Albin. Nat. Hist. Engl. Ins. 

 1720, pi. vii. Tfogns lulorius, Gr. I. E. ii. 374, excl. var. 5 ; Ste. 111. M. vii. 270 ; 

 Ralz. Ichn. d. Forsl. i. 130; Wesm. Nouv. M^m. Ac. Brux 1844, p. 143; Bui. Ac. 

 Brux. 1854, p. 134 ; Holmgr. Ichn. Suec. ii. 285 ; Berth. Ann. Soc. Fr. 1896, p 295, 

 6 9 . lihueninon iniperatorius, I'anz. Schaef. Ic. t. ccxlv. ff. 5, 6, ? . /. pisorius, 

 Panz. lib. cit. t. xx. f. 6. /. cin Disaster, Schr. En. 348 ; F. B. 281. /. crocalus, Fourc. 

 E. P. 399. Tragus excelleus, Tisch. Stett. Zeit. 1882, i. 



A large and robust species, variegated with blacl< and red. Head not 

 narrowed behind the eyes, for the most part fulvous ; marked with black, 

 especially upon the occiput. Antennae black ; basal half beneath, or 

 entirely, reddish. Thorax more or less black, with the pronotum, callosities 

 before and beneath the radix, and the scutellum flavous ; often also with 

 two lateral marks on prothorax, and on the disc of mesonotum, and the 

 post-scutellum, fulvous ; areola very small, triangular ; 

 upper areae complete ; dentiparal areae with parallel or 

 sub-parallel distinct transverse costae. Abdomen large, 

 apically obtuse ; fulvous, with more or less piceous marking; 

 T. lutorius. post-petiole black, often apically fulvous in c^, punctate or 

 sub-aciculate ; gastrocaeli normal ; second and third ven- 

 tral segments with central fold. Legs rufescentfulvous, coxae and apical 

 half of hind femora usually black. Wings, especially towards their apices, 

 fulvescent ; stigma fulvous. Length, 20 25 mm. 



Rev. T. A. Marshall mentions (E.M.M. 1896, p. 265) a most peculiar 

 circumstance, which we may, although the species of the parasite is not 

 determined, attribute with some certainty to T. lulorius. He says a pupa 

 of Acherotilia Alropos was forced by artificial heat to an unnaturally early 

 emergence, when within the body of the imago was discovered a large 

 Ichneumon, still in the larval condition, the forcing of the host having not 

 led to a similar effect upon its parasite ; this would, however, appear to 

 be the exception rather than the rule — cf. Alelanichneumon leucoiitelas, 

 Ichfieumon deliralorius, &ic.,posl. 



The species of this genus are not very commonly found, in June and 

 July, around London, in gardens and woods (Stephens) ; they are frequently 

 captured during the summer months heavily flitting — " something between 

 a fly, a jump, and a buzz " — in the neighbourhood of privet, throughout 

 the day (Entom. i88r, p. 129) ; flying about sallows at Whittlesea Mere, 

 in July (Curtis) ; Lynn, in Norfolk (Bridgman) ; rare about Yarmouth 

 (Paget) ; Carah Lake, in Co. Kerry, in middle of August (Yerbury) ; 

 Aldeburgh, in Suffolk, bred from Deilepliila galii (misnamed in E.M.M. 

 1889, p. 455). It is a common parasite upon Acheronlia Alropos and Sphinx 

 liguslri, and has also been bred from Smeri?ilhus ocellalus and J)', populi, 

 in Britain. Bignell, who has bred this species from .5'. liguslri, in Devon, 



