164 BRITISH ICHNEUMONS. 



the Continent, where it is common. One would suspect, however, that 

 such a ubiquitous s[)ecies has much commoner hosts than the above, and 

 I have not noticed it to be especially attached to marshy localities. 



2. paludicola, IVesm. 



Chasinodcs tnolatorius, varr. 5 et 6, Wesm. Bui. Ac. Erux. 1848, p. 141. C. paludi- 

 cola, Wesm. lib. cit. 1S57, p. 356 ; Ilolmgr. Ichn. Suec. i. 5 ; Thorns. O. E. xviii. 1897; 

 Berlh. Ann. Soc. Fr. 1894, p. 518, i ?. 



Head black with the palpi fuscous ; labrum and sometimes mandibles 

 ferrugineous ; facial orbits of the $ stramineous. Antennae black, more 

 or less ferrugineous beneath and, at least in ? , centrally white-banded. 

 Thorax black, $ rarely with a white dot beneath the radix. Scutellum 

 entirely or apically, and sometimes in $ the post-scutellum also, white. 

 Abdomen black with the incisures or sides of the second and third seg- 

 ments often ferrugineous ; of $ ventrally plicate, of ? with segments six 

 and seven dorsally white-marked. Legs red ; coxae, trochanters, hind 

 tarsi and sometimes the apices of their tibiae, black. Wings sub-hyaline, 

 stigma fulvous ; tegulae nigrescent, with pale marks in $ ; areolet some- 

 what narrowed above. Length, 14-15 mm. 



The structure of this species varies so little from that of the preceding 

 as to necessitate no mention above ; it differs, however, in having the 

 post-petiole centrally sub-distinctly aciculate, the fourth to sixth segments 

 are more elongate, the genital valvulae stouter and more prominent ; the 

 abdomen of the $ is not broadly red, and the $ antennae are usually 

 white-banded ; it may superficially be at once distinguished by its robuster 

 form and much larger size. 



This species has several times been bred from N'onagria typhae, on the 

 Continent, where it is mixed with, though much rarer than, the preceding. 

 It appears to have been unaccountably mixed with Ichneumon quaesitorius, 

 in Britain, where it has hitherto been overlooked and unrecorded. Rev. 

 E. N. Bloomfield has taken both sexes in the Hastings district and Bignell 

 has several times bred it, in the middle of September, from Nonagi-ia 

 cannae, in Devonshire ; the $ is said, like that of the last, to hibernate in 

 the perfect state. 



Sub-tribe. 

 AMBLYPYGINI. 



Table of Genera. 



Abdomen equilateral, linear ; of 5 apically compressed. 



Spiracles elongate ; scutellum sub- 

 triangular ; tarsi not white I. LlMERODES, rF(?i-w. 



Spiracles oval ; scutellum quadrate ; 

 tarsi centrally white 2. Hypomecus, IVcsni. 



Abdomen laterally slightly rounded 

 or sub-ovate. 



First segment not dorsally intumes- 

 cent in the centre. 



Pronotal furrow entire. 



Clypeus apically truncate. 



Tarsi pilose and setiferous beneath. 



