230 BRITISH ICHNEUMONS. [Fezomachus. 



black wilh broad red margins, very rarely entirely black ; the rest black 

 and often witli very distinct, though narrow, red posterior margins. Legs 

 red ; posterior femora and apices of their tibiae fuscous. 



cJ . Opaque, reticulate ; head rather wider than the thorax, buccate, 

 much narrowed behind the eyes ; cheeks broad, clypeus discreted. An- 

 tennae with first joint of flagellum longest, about four times longer than 

 broad, the remainder gradually decreasing in length, filiform, a little 

 shorter than the insect. Thorax longer than high ; mesothorax trilobed, 

 the lines distinctly impressed in front ; metathorax of ordinary length, 

 sloping in a curve almost from base to apex, with indications of an elongate 

 pentagonal areola, not closed behind ; petiolar area only defined at sides. 

 Abdomen ovate, about as long as head and thorax and a little wider than 

 the latter ; first segment linear, slightly longer than three times the width 

 of the base ; spiracles very prominent ; post-petiole parallel-sided, one- 

 fourth longer than wide, and not quite twice the width of the petiole ; 

 second segment sub-quadrate, dull and rugulose ; remainder transverse, 

 third and fourth being widest ; apical half of the abdomen covered with 

 not very close pubescence. Legs slender. Wings with outer nervure of 

 areolet wanting ; recurrent nervure curved towards apex of wing ; trans- 

 verse ordinary interstitial ; no nervelet ; transverse anal opposite, divided 

 one-third from bottom, emitting nervure distinct ; stigma broad, emitting 

 radius beyond its centre. 



Black ; scape and base of first joint of flagelfum partly pale chestnut- 

 red ; pronotum and apex of scutellum dull red, apex of first segment of 

 abdomen, second and third pale chestnut-red, second with a transverse 

 fuscous stain in the middle, third with a large brownish-black mark cover- 

 ing nearly the whole segment. Legs pale chestnut-red ; front femora 

 behind, intermediate ones in front, wilh a fuscous line ; hind coxae and 

 femora except the base, fuscous ; apex of the middle and hind tibiae 

 stained. Wings slightly infumate, with a darker band across the wing 

 before the stigma, and another from the middle of the stigma to the apex 

 of the wing, an irregular white line running along the recurrent discoidal 

 nervure ; radial nervure and stigma brown, the latter white at the base. 

 Length, 2^-5 mm. 



I am strongly of opinion that F. elaphrus is a dimorphic form of the $ , 

 but of this I am unable to satisfy myself since I possess but a single old 

 specimen, the only one known in Britain, which was taken by Rev. T. A. 

 Marshall, at Cornworthy in Devon, many years ago. It is an apterous 

 form. 



Brischke says that Hemiteles variabilis, Ratz., and H. palpator, Grav., 

 are both the same species and are the male of F. cursiians, Grav. ; in the 

 former statement he is probably correct, but I have shown that the latter 

 male must be associated with P. insokns. The male may be distinguished 

 from F. pedicularius by the darker base of the antennae, darker abdomen 

 and legs. 



From F. decipiens the female is easily known by the broader head 

 and by the colour of the antennae. According to Forster it differs from 

 F. peregrinator in the red spots on the mesonotum and the colour of the 

 abdomen, but the colour alone cannot be relied upon as a distinction 

 between so closely allied species ; the chief differences appear to lie in the 



