264 BRITISH ICHNEUMONS. [Coleocailrus. 



COLEOCENTRUS, Gravenhovst. 



Gr. I.E. iii. 437, ? ; Thorns. O. E. viii. 732. Macrns, Gr. I. E. iii. 707, i 

 (1829). 



Head transverse and subbuccate, eyes oval ; cheeks not short, genal 

 costa inflexed ; clypeus short and discreted, apically produced in the 

 centre ; mandibular teeth subequal. Antennae filiform, shorter than body ; 

 of (^ slender. Thorax subcylindrical ; mesothorax laterally subquadrate, 

 notauli deeply impressed and reaching centre of mesonotum, mesoster- 

 num not transverse with no lateral sulci, epicnemia obsolete ; meta- 

 thorax rugose Avith a few longitudinal costae only, spiracles distinct and 

 oval. Scutellum triangular and strongly convex. Abdomen subsessile, 

 convex, as broad as and twice longer than thorax, apically compressed ; 

 9 ventral valvulae acute and vomeriform ; basal segment subequilateral 

 and distinctly deplanate ; the second and third with lateral oblique im- 

 pressed lines and in ^ the incisures broad and deeply impressed ; 

 seventh and eighth large and produced, anus subacuminate ; terebra 

 nearly as long as the body. Legs long and somewhat slender. Wings 

 ample with areolet small, triangular and petiolate ; upper wings with the 

 lower basal nervure interstitial, the upper basal strongly oblique and not 

 curved ; radius emitted from before the centre of the narrow stigma, and 

 longer basally than apically ; fenestrae minute and broadly discreted ; re- 

 current nervure hardly curved ; lower wings with the first recurrent 

 strongly postfurcal. 



The head, thorax and legs resemble those of Ephial/cs, but the abdo- 

 men and wings are more similar to those of certain Ophioninae. 



This genus, a $ of which is figured by Ratzeburg (Ichn. d. Forst. iii. 

 94), was placed by Gravenhorst under Banchiis and originally contained 

 females only, since he erroneously placed the males in his Ophionid 

 genus Macnis. They were united by W'esmael, in his " Notice sur les 

 Ichneumonides de Belgique appartenant aux genres Metopius, Bauchus et 

 Cokocentnis'' oi 1849, where he states the opinion that they appertain 

 rather to the Pimplinae. Thomson retains the genus in this position on 

 account of the oblique incision of the basal segments, though indicating 

 the affinity shown with the Ophioninae by the apically compressed 

 abdomen. 



1. croceicornis, Grav. 



Macrus croceicornis, Gr. I.E. iii. 710, <? . Macrocoleus croceicornis, Desv. 

 Trans. Ent. Soc. 1850, p. 12. Coleocentrns excitator, Wesm. Bui. Ac. Brux. 

 1849, p. 633, excl. 9 {nee Gr.). C. croceicornis, Holmgr. Sv. Ak. Handl. 1860, 

 n.lO, p. 8; Tasch. Zeits. Ges. Nat. 1863, p. 296, J ; Brisch. Schr. Nat. Ges. 

 Danz. 1880, p. 108, ? ; Brauns, Mit. Schweiz. ent. Ges. 1888, p. 8, ? . Var. 

 Macrus soleatiis, Gr. I.E. iii. 711, ,J . 



Head large and subbuccate with the temples tumidulous, of $ imma- 

 cdate, of S " '^1' l'^^' P'^lpi. labrum and facial orbits broadly flavous ; 



