Homocidus | BRITISH ICHNEUMONS. 101 

and, possibly, another in the Nottingham Museum, captured at Bagthorpe 
on 27th May, 1902, by Professor Carr. It is much mixed with the last 
species in collections and its distribution is probably co-extensive. 
Giraud bred it (Ann. Soc. France, 1877, p. 408) from a species of Syrphus 
in Austria; and it may be well to here note that his MS. Aassus pipizae 
is said (oc. c’t.) to have emerged from the allied Prpiza noctiluca, Linn. 
14. niger, Morl. 
Homoporus niger, Morl. Trans. Ent. Soc. 1905, p. 422, ¢. 
Head as broad as thorax, black with face, mouth except apices of man- 
dibles, frontal orbits and cheeks shortly, stramineous; vertex narrow and 
not emarginate; clypeus hardly emarginate apically in the centre. An- 
tennae filiform and black above with the scape and pedicellus stramineous, 
and flagellum ferrugineous, beneath. Thorax with a hamate line before 
radices and dots beneath both pairs of wings, as well as before the anterior 
pair pale, as also is the mesosternum anteriorly ; metathorax scabriculous 
with the lateral costae, the petiolar and subquadrate basal areae entire. 
Scutellum black. Abdomen subparallel-sided, entirely black; two basal 
segments coarsely and confluently punctate, with their ventral plica dull 
testaceous ; the first basally bicarinate nearly to its centre and the second 
basally irregularly striolate; anus nitidulous and not compressed. Legs 
fulvous; all the coxae and trochanters stramineous, with the hind coxae 
basally black ; hind tarsi not infuscate. Wings with radix stramineous 
and stigma fulvous; areolet sessile, with the outer nervure subobsolete ; 
nervellus subopposite and intercepted below its centre. Length, 5 mm. 
This species is certainly allied to the French H. drevicornis, Thoms., 
and it is just possible that it is its unknown male, though differing in the 
short petiolar carinae, posteriorly entire vertex, entirely pale stigma, sub- 
striate second segment and the colouration of the legs. At first 1 had 
thought it possibly the unknown male of 1. dongzpes, Holmgr., to which 
the colour of the legs is more nearly allied, but the comparatively short 
antennae, entirely black abdomen and fulvous hind tarsi, seem to preclude 
such a situation. 
1 swept the type of this species, which is in my collection and the only 
specimen known, from rank herbage in Wroxham Broad, Norfolk, during 
the evening of June 14th, rgor. 
15. Sundevalli, Holmgr. 
Bassus Sundevalli, Holmgr. Sv. Ak. Handl. 1855, p.364,¢ ¢; Brisch. Schr. 
Nat. Ges. Danz. 1878, p.113,¢. B. scabrosus, Desv. Trans. Ent. Soc. 1862, 
p- 217,¢. Homoporus Sundevallt. Morl, lib. cit, 1905, p. 427; Thoms. O.E. xiv. 
1508,¢ ¢. 
A black, punctulate and somewhat shining species. Head transverse 
and hardly as broad as the thorax; mouth, the apically emarginate clypeus, 
central 2 epistomal dot or ¢ whole face, flavous; frons subsulcate, im- 
maculate, shining and sparsely punctulate; vertex evenly and somewhat 
strongly emarginate ; face subdeplanate and laterally parallel. Antennae 
setaceous and longer than half the body, beneath flavous in ¢@ and, 
except scape, rufescent in 9; basal flagellar joints of ¢ subelongate. 
