Campoplex] BRITISH ICHNEUMONS. 67 



CAMPOPLEX, Gravcnhorst. 

 Grav. I.E. iii, 1829, 45:i ; Forst. Verh. z.-b Ges. 1868, p. 761. 



Head nearly alway.s distinctly tran.sverse, rarely nearly cubical ; eyes 

 internalh' emari;inate ne.xt the scrobes ; clypeus laterally t'oveate, and not 

 discreted from the closely punctate and subdeplanate face ; mandibles 

 broad with equal teeth. Antennae subfiliform, not longer than body and 

 always somewhat stout ; scape subentire. Thorax always coarsely 

 sculptured discallv, scabrous or rugulose ; metathorax elongate and not 

 apically produced ; metanotum usually impressed longitudinally in the 

 centre, rarely carinate with more or less obsolete areae ; spiracles always 

 elongate and often linear. Scutellum coarsely sculptured and not 

 deplanate. Abdomen strongly compressed throughout and usually 

 centrally red ; first segment not plicate beyond centre of postpetiole ; the 

 two basal segments narrow with their spiracles beyond, very rarely in, 

 their centre; third at least basally margined; terebra very rarely elongate. 

 Legs slender with hind femora usually a little stouter; tarsi not explanate, 

 and their claws always more or less closely pectinate; calcaria stout, with 

 the front ones sinuate. Areolet large and broad, always triangular and 

 distinct, often petiolate and never broadly sessile ; stigma narrow ; radial 

 cell not broad, with the external radius usually bisinuate ; lower wings 

 with basal abscissa of radius and the recurrent nervure strong and of 

 variable relative length ; nervellus usually geniculate or intercepted 

 below, rarely in, its centre, but sometimes simply a little curved at its 

 lower extremity. 



This genus is easily recognised by its elongate metathoracic spiracles 

 and large triangular areolet. Its members range themselves in a some- 

 what natural sequence under two groups, according to the length of the 

 ventral plica on the two basal segments and the relative length of the first 

 recurrent nervure with that of the basal abscis.sa of the radius, in the hind 

 wing ; thus the larger species have the two former of subequal length 

 with the radial abscissa very obviously longer than the recurrent nervure, 

 while the smaller ones have the basal plica much the longer with the 

 radial abscissa not or but slightly longiT than the recurrent nervure ; the 

 abdomen is almost invariably fiavfuis- or red-cinctured, with head, thorax 

 and antennae immaculate black. 1 have had to omit from the following 

 table three species, which appear either synonymous with some there 

 included, or but insufficiently established as indigenous. These are 

 C. 7<alidicornis, Holmgr. (Sv. Ak. Handl., 1854, p. 9, J 9)- which figures 

 in both Marshall's catalogues, but is not taljulated by Hridg.-Kitch in 

 1885 ; it was given by its author as a var. of C. ptii^^illalor in 1858, and is 

 unmentioned by him in 1872. C.insigniliis, Fcirst., is said (Proc. S, Lond. 

 P^nt. Soc, 1896, J). 87) to have been bred from larvae of '/'/iichi bttiilae by 

 U. Williams; Mocsary is said by Dalla 'iVjrre to have also raised it from 

 Uylophila biiolorana; it difiiTs but slightly from C. fovtolaliis, and I 

 suspect some error in our record. C. f>iilt/iii/>ts, Molmgr., is a male 

 which still remains unmentioned since first described in 1872 ; and no 

 reiianic can be placed ui)i>ii the uiuJescribed and admiltedlv doubtful 

 female, thought l(j constitute its aUi-rnale sex bv Fitch (Kntom., 18S0, 

 p. 256) and bred by Weston fnjm ('y/i//>s A'c/A//'/ galls. 



