128 BRITISH ICHNEUMONS. 



which has the antennal flagellum for the most part red, as rare about 

 London, in July. 



17. suspiciosus, IVesm. 



Ichnatinon suspiciosus, Wesm. Nouv. Mem. Ac. Brux 1844, p. 62, 9 ; Holmgr. Ichn. 

 Suec. i. 62, excl, i ; cf. Ent. Tidskr. 18S0, p. 30 ; Thorns. O. E. xii. 1223 et xviii. 191S ; 

 Ann. Soc. Er. 1886, p. 20 ; Berth lib. cit. 1894, p. 642, <J« 9 . Var. /. quadripunciatus, 

 Kriechb. Ent. Nach. 1890, 9 . /. coinputatoriiis, Hohngr. Ichn. Suec. i. 53, S [uec 

 Mull.). 



Head black ; cheeks behind the mandibles and the temples somewhat 

 buccate ; frontal orbits of 5 red ; S with palpi, clypeus and face flavous. 

 Antennae of $ filiform, sixth joint quadrate, white-banded ; $ with the 

 scape flavous, flagellum fulvous beneath, without tyloides on six basal 

 joints, nor six to ten carinate internally. Thorax black ; $ with pronotum 

 and lines before and beneath radix flavous ; areola rectangular, longer than 

 broad, sub-quadrate in S ', emarginate apically ; costulae usually entire. 

 Scutellum of c? a little convex, flavous ; of $ white. Abdomen of $ 

 lanceolate-oval, of S sub-linear or elongate-elliptic ; post-petiole aciculate, 

 gastrocaeli somewhat small, of $ normal ; black, 9 with segments two and 

 three red, sometimes inclining to yellow, five to seven, and very rarely the 

 fourth (var. 4-punctatus, Kriechb.) also, with large white marks, of which 

 that on the fifth segment is always larger or at least as large as the follow- 

 ing ; S with segments two and three flavous or ochraceous-red, third sub- 

 quadrate, anus always immaculate. Legs normal, black ; tibiae rufous 

 distinctly stramineous centrally, the front pair rufescent at apex, inter- 

 mediate at apex and before base usually piceous, hind ones at apex and 

 before base quite black ; tarsi red in $ , flavous with fuscous apices to 

 posterior in $. Wings flavescent ; stigma fulvous or rufescent; tegulae 

 red-brown, of S in part flavous. Length, 14-16 mm. 



The essential points of the above description are taken direct from that 

 of Berthoumieu, whose specimens were actually captured in " un etat de 

 copulation parfaite " ; he, however, makes no mention of rufescent colora- 

 tion in the $ tibiae. Very closely allied to /. buccu/entus, of which 

 Wesmael thought it possibly only a variety, but pointed out the following 

 9 distinctions : the head is narrower, and only as broad as the thorax ; 

 the cheeks are less dilated and deflexed ; the puncturation of the second 

 and third segments is a little more distinct, and the colour of the tibiae 

 is paler. 



It agrees, moreover, therewith in the gradual narrowing of the markings 

 on the apical segments, in the posterior coxae of the S being very closely 

 punctate and dull beneath, as well as in the elongate areola ; but differs 

 from it in the genal costa of the $ being only slightly inflexed, the oral very 

 slightly elevated, the tibiae centrally stramineous, the upper mandibular 

 tooth somewhat acute; $, the head a little narrowed behind the eyes, the 

 second and third segments more strongly punctate, the scutellum slightly 

 elevated, the disc of the mandibles before the apex is convexly glabrous, 

 and the legs are also distinctive. 



\n coloration it much resembles / confuson'i/s 9 j from which, however, 

 it may be known at once by the white mark on segment five, which is 

 constant, and the relative size of the following marks, and by the meta- 

 thoracic spiracles, which are slightly less linear. 



