38 BRITISH ICHNEUMONS. [ Exochus 

Known from £. podagricus by its rather stouter and longer size, longer 
antennae and calcaria of which the internal hind ones reach beyond 
centre of their metatarsi, by the subinfumate wings, the structure of the 
sessile areolet and the obviously smaller spiracles; as well as the shorter 
basal segment and basal position of the radial nervure. 
I am not aware that this species has been recognised since first 
described from Sweden, but I have a female, certainly referable to it, 
which was captured at Felden, near Boxmoor, in Herts. by the late Albert 
Piffard. 
7. congener, Holmgr. 
Exochus congener, Holmgr. Sv. Ak. Handl. 1855, p. 319; Brisch. Schr. Ges. 
K6én. 1871, p.101; Voll. Pinac. pl. xxxviii, fig.6, ¢ ¢. Triclistus congener, 
Holmgr. Ofv. 1873, p.57; Davis, Trans. Amer. Ent. Soc. 1897, p.212, ¢ 2. T. 
pubiventris, Thoms. Deut. Ent. Zeit. 1887, p. 205, ¢ ?. 
A black species with the legs except basally flavescent, the areolet large 
though a little petiolate and emitting the recurrent nervure from beyond 
its centre. Length, 64 mm. 
Related to the last species in the size, outline and conformation of 
both calcaria and spiracles, but having the second segment laterally 
more closely and coarsely. punctate, the third and following more 
densely punctate and grey-pubescent, and the areolet of different shape. 
It occurs both in Europe and the United States of America ; and little 
doubt is admissable that the above species are synonymous. ‘Thomson 
appears to have erected new names in this genus whenever he failed to 
follow Holmgren’s diagnoses. 
LL. congener is in Marshall’s Catalogue and recorded as bred from a 
Hungarian pupa of (Vola crcatricalis, Tr., by Baker (Entom. 1883, p. 67) ; 
and there are three specimens under this name from Milford Haven, 
Cornworthy, and Darenth Wood in the former’s collection. Bridgman 
introduces the latter as new to Britain on the strength of a specimen he 
had taken at Earlham near Norwich during June, 1878 (Trans. Ent. Soc. 
1887, p. 374) on Thomson’s authority; and I have a couple taken by 
Dr. Capron at Shere in Surrey. Brischke tells us (Schr. Nat. Ges. Danz. 
1878, p. 107) that he has raised it from Vofhris verbascella and a species of 
Tortrix in Prussia. 
8. spiracularis, Thoms. 
Triclistus spiracularis, Thoms. Deut. Ent. Zeit. 1887, p. 205, ¢. 
Black and shining with the legs pale, the metathoracic spiracles large, 
calcaria short and wings hyaline with the areolet oblique and elongately 
petiolate; ¢ with the flagellum basally pale throughout. Length, 5 mm. 
Smaller than £’. congener, with shorter calcaria and the areolet more 
petiolate and oblique. 
I possess four specimens of this Swedish species, not hitherto recorded 
as British, whose hitherto undescribed @ differs only in its narrower body 
and longer, basally pale antennae, from Dr. Capron’s Surrey Collection, 
and a couple were bred with Chorinaeus tricarinatws and Aficrogaster 
tibialis at the end of May, 1898, from Colchester larvae of Depressaria 
scopariella, Hein., by Bankes. 
