BRITISH ICHNEUMONS. 259 



radix. Abdomen black with second segment apically red. Legs red ; 

 hind tarsi with joints two to four infuscate ; hind coxae unidentate. 

 Tegulae and stigma fuscous ; radix white. Length, 6 mm. 



S . Head with mandibles centrally, and a dot towards the base of the 

 clvpeus, white. Antennae and thorax entirely black. Abdomen black 

 with apical margin of second segment rufescent. Legs red ; coxae black 

 or apically rufescent ; hind trochanters basally, base and apex of hind 

 tibiae, and sometimes the apex of their femora, black ; hind tarsi infuscate. 

 Stigma and tegulae black ; radix white. Length, 5 mm. 



Wesmael, who shortly describes both sexes as above, tells us the $ is 

 allied to those of P. stimulator and P. homochlorus, but differs in the colour 

 of its antennae, the joints of which are shorter and stouter ; and adds that 

 the S is also similar to that of P. stimulator, though quite possibly consti- 

 tuting a variety of P. callopus. 



I have followed Thomson in uniting these two species, though it is to 

 be regretted that he gives us no clue to the identity of Holmgren's $ 

 mysticus, which he probably examined. To the above description the 

 former adds that the present species differs from P. stimulator and P. ma- 

 culicornis in its less dilated petiole and finely alutaceo-punctate abdomen ; 

 that the legs of the ? are stouter, with the coxal crista elevated at both 

 base and apex. 



A female taken at York by Mr. Beaumont towards the end of September 

 has the above coxal characters and abdominal alutaceousness well marked, 

 but its antennae are pale-banded, and second to fourth abdominal 

 segments ferrugineous, with the pale radical callosity wanting. Mr. G. C. 

 Bignell records P. tetricus, in his " Ichneumonidae of South Devon," as 

 having been captured at Exeter on 17th August. Much confusion exists 

 regarding this species or these species, whose continental distribution is at 

 present uncertain. 



24. stimulator, Grav. 



Ichneumon stitnulator, Gr. Beit. Ent. Schl. 1829, p. i, excl. var. ; I. E. i. 143, excl. 

 varr. ; Ste. 111. M. vii. 135 ; Katz. Ichii. d. P"oist i. 134, 6 ?. F/iaeoi^eiws stimulator, 

 Wesm. Nouv. Mt^m. Ac. Brux. 1844, p. 1S4 ; Bui. Ac. Brux, 184S, p. 318 ; Ilolmgr. 

 Ichn. Suec. iii. 447 ; Thorns. O. E. xv. 1649 ; Berth. Ann. Soc. Fr. 1S96, p. 376, {, ? . 



Head not buccate, hardly narrowed behind the eyes, black ; frons finely 

 and densely punctate, somewhat shining ; apices of cheeks broadly sub- 

 dilated below the mandibles ; clypeus shining, apically depressed, basal 

 incisure arcuate; palpi and mandibles of ? red, of c?, as well as some- 

 times a dot at the facial orbits and another on pronotum, flavous. An- 

 tennae filiform, rather longer than half the body ; of $ ferrugineous 

 beneath, of ? rufescent with scape black and central joints pale, the 

 eighth being sub-quadrate. Thorax shining, black with pale callosities at 

 radix ; notauli indicated ; metanotal areae strong and complete ; areola 

 sub-hexagonal, slightly longer than broad ; petiolar area concave, discreted 

 and centrally transversely sub-strigose. Abdomen black, with segments 

 two to four apically sub-castaneous ; post-petiole centrally glabrous and 

 nitidulous ; second segment shorter than apically broad, finely but very 

 distinctly punctate, with the gastrocaeli very deep and occupying nearly 

 the whole base ; terebra slightly exserted. Legs red, coxae and hind tarsi 

 usually black ; base and apex of hind tibiae infuscate ; (^ with anterior 

 coxae and trochanters flavous, and often the apices of hind femora black 



