l82 BRITISH ICHNEUMONS. 



their tibiae internally flavous. Wings hyaline ; tegulae and stigma piceous, 

 the former with an anterior flavous dot ; areolet pentagonal. Length, 

 9 mm. 



The broad gastrocaeli and simple apical ventral segment appear to ally 

 this (? strongly with species of the preceding genus, but its large apical, 

 and plicate fourth ventral segment, basally smoothly punctate second seg- 

 ment, <S:c., justify the position here assigned to it. It is closely related to 

 Ainblyteles tru?icico/a, Thoms. {cf. O. E. xxi. 2404), but the gastrocaeli are 

 larger, the metanotal areae complete, scape immaculate, &c. 



I have described the sexes of this species separately, because the male 

 has previously been but insufficiently noticed by Desvignes, and even now 

 some doubt must be entertained concerning their relationship. 



Desvignes, upon whose authority alone this species finds a place in our 

 fauna, indicates no locality for the examples in the British Museum, which 

 would not appear to be from Curtis' collection. 



2. occisorius, Fab. 



Ichneiititon occisorius, Fab. E. S. ii. 142 ; Piez. 61 ; Gr. I. E. i. 389, $. Ainblyteles 

 occisorius, Wesm. Nouv. ]\Ii?m. Ac. Brux. 1844. p. 122 ; Bui. Ac. Bru.x. 1848, p. 296 ; 

 lib. cit. 1849, p. 40 ; lib. cit. 1854, p. 100 ; Ilolmgr. Ichn. Suec. ii. 233 ; Voll. Pinac. 

 43, pi. xxvii., ff. I, 2 ; Thonis. Ann. Soc Fr. 1888, p. 118; Berth, lib. cit. 1895, P- 

 645, i ? . Ichneumon sanguinatorius, Gr. I. E. i. 295, ? {sic i ) ; Ste. III. M. vii. 164. 

 /. niarginatorius, Panz. F. G. Ixxviii. 14, cj. Spilichneumon occisorius. Thorns. O. E. 

 xix. 2089, i ? . 



Head black, cheeks and temples a little dilated ; oral costa strongly 

 elevated ; mandibles stout, obtuse, pale, bidentate with the lower tooth 

 the longer ; palpi pale ; frons with a small dentation between the scapes ; 

 $ with clypeus apically angulated and with face entirely or partially 

 flavous ; $ with frontal orbits usually rufescent. Antennae black ; of $ 

 incrassate, apically attenuate, white banded with the flagellar joints monili- 

 form, of which the second is quadrate ; $ with the flagellum sub-cylindrical, 

 and the scape usually flavous beneath. Thorax black with a line beneath 

 and sometimes before the radix, and rarely the pronotum, flavidous ; areola 

 sub-quadrate, longer in $ , rectangular ; costulae obsolete ; apophyses want- 

 ing. Scutellum stramineous. Abdomen sub-cylindrical, black ; segments 

 two and three red in $ , generally flavous with or without black markings 

 in $ ; fourth to sixth with apical margins, and the seventh distinctly marked 

 with, white in ? , and flavous in $ ; post-petiole aciculate apically closely 

 punctate, of 9 sub-coriaceous ; gastrocaeli normal but superficial ; fourth 

 ventral segment of $ plicate, and the ultimate strongly spinate ; genital 

 valvulae black. Legs somewhat stout, black ; tibiae and tarsi spinulose 

 and, except apices of the posterior, red ; front femora often apically red. 

 Wings a little clouded ; stigma fulvous, tegulae sometimes flavous ; areolet 

 narrowed above. Length, 11-16 mm. 



The (? rarely has the central segments entirely or dorsally black, or the 

 face and scutellum and abdomen black, with only the two apical segments 

 flavous-marked ; Holmgren enumerates twelve distinct varieties of the c?, 

 running from face and second and third segments entirely flavous to 

 entirely black. 



Ichneumon am/nonius of Gravenhorst, recorded as British, by Stephens, 

 is considered a variety of this species by Marshall, of S. livuiophilus, Thoms., 



