302 BRITISH ICHNEUMONS. [ Polyblastus 
all claws very distinctly pectinate. Areolet narrow, strongly oblique and 
apically incomplete; radial nervure apically nearly straight; nervellus in- 
tercepted below its centre. Length, 6-—7 mm. 
The unique colouration is remarkable. 
Ratzburg records a single @ bred from a pupa of Cladius eucera in 
Germany in 1852; Holmgren knew two Swedish ? 9 taken by Boheman 
and himself in grassy places on 5th September; Gaulle records it from 
France; and Brischke bred both sexes in Prussia from larvae of Cladus 
viminalis and unknown species of Wematus. It was introduced as British 
by Bridgman (Trans. Ent. Soc. 1887, p. 374) on the strength of a single 
example bred from an unknown host, probably at Worthing, by Mr. 
W.H. B. Fletcher. A beautiful 9 emerged in my breeding cage on 
26th May, 1903, from the cocoon of Cladius viminalis, taken at Holbrook 
in Suffolk on 11th of the preceding February. 
15. Wahlbergi, Holmer. 
Polyblastus Wahlbergi, Holmgr. Sv. Ak. Handl. 1855, p.213; Brisch. Schr. 
NataGesOanz s878) upaco sc : or: 
Shining and black with the mouth, apex of clypeus, scape beneath, 
tegulae, discal abdominal vitta, venter and nearly whole of legs, pale tes- 
taceous. Clypeus somewhat convex and slightly impressed before its 
subrotund apex. Antennae somewhat shorter than the body, filiform and 
infuscate, paler beneath with the scape testaceous. Metathorax punctate 
and somewhat dull, with three distinct areae. Scutellum not pyramidal. 
Basal segment gradually dilated towards its apex, impressed on either side 
and distinctly sulcate centrally ; remaining segments deplanate and nearly 
smooth; the second and third with their apices and a common, more or 
less broad discal vitta testaceous; terebra slender and exserted. Legs 
normal and pale testaceous with the hind femora, tarsi and in @ apical 
half of their tibiae, piceous. Areolet subsessile ; radial nervure apically 
nearly straight; nervellus oblique and intercepted below its centre. 
Length, 5—6 mm. 
The peculiar and constant plaga on the abdominal disc renders this 
species unmistakable. 
The first indication we have of this species as British is a male, ex- 
hibited at a meeting of the Ent. Soc. (Proc. 1880, p. xxviil), captured at 
Ashstead, in Surrey. It is not uncommon with us, however, and has a 
distribution from Sweden, through Prussia where Brischke bred it from 
larvae of Kenusa betulae, to France, whence Gaulle gives Kalosysphinga 
pumila as host. Several from Cornworthy and Botusfleming (Marshall 
coll.), several from Shere in Surrey (Capron coll.), Kings Lynn, several 
in July, 1909 (Atmore), a large male on 24th July, 1904, at Braemar 
(Elliott). 
16. subalpinus, Holmgr. 
Polyblastus subalpinus, Holmgr. Sv. Ak. Handl. 1855, p. 211, 3 ?. 
A somewhat shining, pubescent and black species with only the an- 
terior legs red and hind tibiae white-banded. Clypeus red and sub-im- 
pressed before its rounded apex. Antennae somewhat shorter than the 
body, apically rufescent beneath. Metathorax short, with distinct and 
