108 BRITISH ICHNEUMONS. [ Homocidus 


tells us that in Devonshire he “captured it at Laira, 16th and 23rd Sep- 
tember, depositing ova on larva of aphidivorous flies, which were feeding 
on the wormwood Aphis, Szphonophora absinthit.” My male was swept 
from herbage in Henstead marsh in Suffolk on 28th August, 1898. In 
confirmation of my opinion, I have recently found that the specimen, 
upon which this species was originally considered British, is in Stephens’ 
collection (in Mus. Brit.), labelled ‘‘ s¢rigafor”’ in his own writing, and that 
it is most certainly identical with my own, above described. Other 
specimens have subsequently been mingled with it by Desvignes and 
Marshall, neither of whom understood it. Haliday mentions it, in his 
MS. diary now in the Dublin Museum, as being common in Ireland.* 
23. xanthaspis, Thoms. 
Homoporus xanthaspis, Thoms. O. E. xiv. 1518; Morl. Trans. Ent. Soc. 1905, 
p. 428, o¢. 
A black species with humeral hamate marks, mouth, scutellum en- 
tirely and mesosternum partly flavous; legs entirely testaceous or paler, 
with only hind tarsi darker. Length, 5—64 mm. 
This species is abundantly distinct in its entirely pale scutellum, elongate 
and deeply punctate second abdominal segment, and strongly compressed 
? abdomen. It is the last of the d:mzdiatus group of species and differs 
from my description of that insect in having the face of Q black, of @ 
stramineous together with its cheeks and frontal orbits in part; clypeus 
discally punctulate, apically emarginate centrally, with transverse lateral 
foveolae, and (like the mouth) stramineous; antennae filiform through- 
out, of ? not reaching beyond the thorax, of ¢@ flavous beneath ; 
metathorax rugose-punctate, with petiolar area and lateral costae in- 
dicated ; scutellum large, convex, densely punctate and entirely flavous 
in both sexes; abdomen double length of thorax and in @ strongly com- 
pressed from third segment to anus; postpetiole apically convex in the 
centre; second segment laterally parallel, longer than apically broad, 
coarsely and not confluently punctate; thyridii distinct and subcircular, 
with the intervening space not striolate; third of g@ with a centrally 
interrupted basal stramineous fascia; terebra slightly exserted. Legs 
testaceous or, in 4, paler; hind tarsi alone subinfuscate, and in ¢ their 
tibiae whitish; wings with stigma basally testaceous; areolet oblique, 
subsessile and somewhat large. 
Thomson described both sexes from examples captured by Drewsen in 
Denmark ; I possess three males from Capron’s collection, probably taken 
at Shere in Surrey, and a fourth which I swept from low herbage in ‘Tud- 
denham Fen, Suffolk, on 23rd August, 1905. . 
24. emarginatus, sp. 1. 
Head transverse, not strongly constricted behind the eyes and broader 
than thorax; mouth, except the castaneous mandibular apices, and 
apices of the cheeks stramineous; frons, and the laterally impressed face, 
evenly alutaceous and very dull; clypeus strongly discreted, convex, 
* Since the above was written Pfankuch has found that Gravenhorsts’ ¢ ¢ of B. strigator (which he 
seems to allow are synonymous with Fabricius’ species) are co-specific with B. ruficornis, Holmgren, 
