96 BRITISH ICHNEUMONS. { Homocidus 

the nervellus intercepted below centre; radix and tegulae flavous; stigma 
dark testaceous, basally pale. Length,6 mm. 9 only. 
It is said to agree with H. drgutfafus in every way but its coloration : 
the metathorax apically and abdomen basally are rosy, and the hind tibiae 
nigrescent becoming basally whitish through gradual rufescence. 
The type was captured by Bignell at Dousland, in Devon, on 23rd 
August, 1884; itis now in the Plymouth Museum. A second 9 has 
been captured by Kriechbaumer in Bavaria. Both were examined by 
Thomson and considered to constitute a good species by him. 
9. flavolineatus, Grav. 
Bassus flavolineatus, Gr. 1. E. iii. 337; Holmgr. Sv. Ak. Handl. 1855, p. 358; 
Brisch. Schr. Nat. Ges. Danz. 1878, p. 112, ? (nec Zett.). Homoporus flavolinea- 
tus, Thoms. O.E. xiv. 1502; Morl. Trans. Ent. Soc. 1905, p.427,¢ ¢. Var. Bas- 
sus interruptus, Holmer. Sv. Ak. Handl. 1855, p. 359,¢. Var. B. bimaculatus, 
Holmegr. lib. cit. p.360; Brisch. Schr. Nat. Ges. Danz. 1878, p.112,¢. 
A black species with the epistoma or in ¢ whole face and mouth, 
humeral lines and scutellum apically, white; legs red with the hind tibiae 
and tarsi, except the white base of the former, black; postpetiole quad- 
rate. Length, 5—6 mm. 
Very similarto H. drgut/atus, especially in its hardly excavate, dull and 
not sulcate frons, the pedal colouration and apically white scutellum; but 
differing in the narrower head, hardly angularly emarginate vertex, always 
white female epistoma, nearly always pale humeral lines, apically sub- 
dilated face, longer basal segment with more distinct basal carinae, quad- 
rate postpetiole, stouter hind tarsi, white callosity beneath hind wings 
and antennae longer than body. 
It sometimes varies in having: (1) the mesonotum immaculate black, 
(z) the mandibles centrally pale, (3) the g¢ scutellum quadrately at apex, 
and laterally nearly to base, white; (4) ¢ legs mainly flavo-testaceous, 
(5) & pronotum and mesosternum mainly pale testaceous (var. d7macu- 
latus), (6) & third segment broadly fasciated, except centrally, with white 
and the fourth with a slender concolorous basal line (var. ¢z/errup/us). 
Gravenhorst knew but a single specimen, sent him by Hope from 
Netley in Shrophire; but it has since been recorded, though of little 
frequency, from southern Sweden, Norway, Prussia, Belgium, and most 
probably France, since it figures in Dours’ Catalogue though not Gaulle’s. 
The only localised British records are Cameron’s ‘‘bred from the pupa of 
a Syrphus got on the hanks of the Kelvin” (E.M.M. xii (1876), p. 228) 
and Bignell’s from Whitsand Bay early in May; it seems by no means 
common and, when found, to occur singly; thus Piffard took a single 
pair at Felden in Herts during many years, Beaumont took one at Black- 
heath in July, 1897, and one at Lewisham in June, 1891, and Newbery 
swept one at Ivybridge in Devon in August, 1905, but Capron appears to 
have met with females not uncommonly at Shere in Surrey. I swepta ? 
at the Brandon Staunch in June, 1903 and another at the end of Septem- 
ber, 1907; a @ turned up on reeds in the Southwold salt-marshes in the 
middle of September with AH. deplanatus, and another was swept at 
Depden, the highest point of Suffolk (420 feet) during the same month. 
I believe Mr. Evans at St. Davids in Fife in the middle of June, rgoo, 
and Mr. Atmore at Kings Lynn, Norfolk, have also taken this species. 
Marshall possessed several specimens from Cornworthy and Bishops 
Teignton, in Devon. 
