Colpotrochia | BRITISH ICHNEUMONS. 13 



(5). 8. Notauli punctiform; basal segment 
subglabrous, 
(10). 9. Head vertically declived immediately 
behind the eyes... fas, SOLVCLISTUS,. Horst. 
(9). 10. Head much broader behind the eyes. 
{3 11. Antennae subclavate ; hind tibiae 
unicalcarate .. PERIOPE, Ha/. 
(11). 12. Antennae filiform ; hind tibiae bical- 
carate zs ~ ne .. EXOCHUS, Grav. 
COLPOTROCHIA, Holmgren. 
Holmgr. Sv. Ak. Handl. 1854, p. 80. 
Head transverse with a posteriorly elevated interantennal cristula ; 
vertex and face convex and the latter somewhat protuberant; clypeus not 
discreted; mandibles basally broad, apically curved and constricted with 
the teeth subequal in length; eyes oblong and distinctly emarginate next 
the scrobes. Antennae filiform, stout, apically attenuate and hardly 
shorter than the body. ‘Thorax stout, notauli wanting, epicnemia entire; 
pronotum excavate, with distinct epomiae; metathorax with the discal 
areae wanting and the basal but indicated; spiracles elongate and parallel- 
sided. Scutellum not bordered. Abdomen ovate-fusiform, sessile, niti- 
dulous and pilose; first segment gradually a little constricted basally, 
with the carinae inconspicuous and not extending to its central spiracles, 
beyond which it is immarginate; segments two to beyond centre of four 
laterally magined, with broad epipleurae; terebra concealed. Legs stout, 
with femora incrassate. Areolet wanting, radius apically strongly sinuate, 
second recurrent almost continuous with submarginal nervure; nervellus 
intercepted below its centre. 
At once known trom all other Exochid genera by the absence of discal 
metathoracic areae and its broadly flavous abdomen. ‘The areolet is 
extremely rarely entire, very small and elongately petiolate. The genus 
is probably confined to single species both in Europe and India, since 
the two described by Vollenhoven (I have his C. afinis from Comano 
Vlasca in Roumania and find no specific distinction) and Rudow seem 
hardly more than forms of our own species, known to be indigenous since 
the time of Stephens. Z7yphon Scoficus is not a member of this genus, as 
was supposed by Marshall and Dalla Torre. 
1. elegantula, Schr. 
Ichneumon mandator, Linn. S. N. ed. x, 565; Fab. M. I. 266; Cryptus man- 
dator, Fab. Piez.86; Anomalon mandator, Jur. Nouv. Méth, 116 (?). Ichneumon 
elegantulus, Schr. En. Ins. Austr. 361; Gr. Mem. Ac. Tor. 1820, p. 375, ¢. 
Trython elegantulus, Gr. I. E. ii. 235; Fonsc. Ann. Soc. Fr. 1849, p. 225, ¢. 
Colpotrochia elegantula, Holmgr. Sv. Ak. Handl. 1855, p. 307,¢; Ofv. 1873, 
p.56; Voll. Pinac. pl. viii, fig. 1; Thoms. Deut. Ent. Zeit. 1887, p. 199; 
Buysson, Revue Ent. 1892, p. 258, 5 ?. 
A shining black species with the abdomen centrally and most of the 
legs bright flavous. Head black with an elevated carina between the 
antennae; genal costa elevated; palpi infuscate. Antennae nigrescent, 
becoming ferrugineous beneath, with the scape more or less broadly 
flavous. Thorax stout and black with grey pilosity, in ¢ pale-marked ; 
metathorax more sparsely punctate with the spiracular and supracoxal 
