168 BRITISH ICHNEUMONS. [ Mesolerus 

38. multicolor, Grav. 
Tryphon naevius, var. 1, Gr. I. E. ii. 153, 2. T. multicolor, Gr. l.c. 168; 
Ratz. Ichn. d. Forst. i. 128, ?. Mesoleius multicolor, Holmgr. Sv. Ak. Handl. 
1855, p. 160; l.c. 1876, p.41; Thoms. O. E. xix. 2046, ¢¢. Var. M. napaeus, 
Holmgr. l.c. 1855, p. 161; l.c. 1876, p. 42, ¢ ?. Var. M. dives, Holmgr. l.c. 1855, 
Pp: 162); 7c S76) pylOona. 
An elongate and slender black species. Head obviously constricted 
posteriorly ; cheeks subbuccate and apically flavous ; mouth, the apically 
emarginate-truncate clypeus and the face flavous. Antennae slender, 
dark rufescent beneath with scape paler, and second flagellar joint linear. 
Thorax elongate with margin of pronotum, a line beneath and at least in 
6 callosity before radices, in ¢ also lateral mesonotal and pectoral 
marks, stramineous; mesopleurae alutaceous; areola often wanting, 
rarely with carinae entire though fine; petiolar area semilunar with dis- 
tinct carinae. Scutellum flavous, rarely in ? fulvidous. Abdomen black 
with the segmental margins and venter flavous; basal segment narrow, a 
little longer than hind coxae, with apical angles obtuse and the discal 
sulcus evanescent; second somewhat shorter than broad, alutaceous and 
like the following pubescent. Legs red, with anterior coxae and tro- 
chanters stramineous; the slender hind tarsi and apices of their 
stramineous tibiae infuscate ; fourth hind tarsal joint linear. Wings with 
stigma subtestaceous, radix and tegulae flavous; areolet rarely externally 
pellucid; nervellus subopposite. Length, 8—g9 mm. 
The varieties consist in having the thorax black or with humeral marks, 
the scutellum pale and a sternal mark, larger in @, concolorous. 
Northern and central Europe; common in Germany during June and 
July, whence Ratzeburg says (doubtless 77 errore) that Dahlbom bred a 
female on 24th July, 1834, from Zimea padella ; Giraud in 1877 gives 
Lophyrus polytomus as an Austrian host ; common in central and southern 
Swedish woods; France, Belgium, etc. Bridgman records it from Nor- 
wich and named a specimen captured in 1879, by the Rev. E. N. Bloom- 
field, at Guestling in Sussex ; there is a female named by Gravenhorst in 
Mus. Brit., with several from Desvignes’ and Marshall’s collections, the 
latter from Botusfleming in 1890 and Bishops Teignton in Devon. Elliott 
has taken this species by sweeping heather at Cromer early in September, 
1903, as well as at North Berwick in August, 1908; and Miss Chawner 
has given it me from the New Forest. In Suffolk it must be extremely 
rare, for I took a male on mountain ash in the Bentley Woods on 17th 
May, 1898, and a female in my garden at Monks’ Soham on 24th 
August, 1909. 
39. niger, Grav. 
Tryphon niger, Gr. 1. E. ii. 126; Ste. Ill. M. vii. 231, 9; Ratz. Ichn. d. Forst. 
i. 114, pl. i, fig.9,¢ ¢. Mesoleius niger, Holmgr. Sv. Ak. Handl. 1855, p. 165; 
l.c. 1876, p.50; Brisch. Schr. Nat. Ges. Danz. 1878, p. 85; Thoms. O. E. xix. 
2040 aoe 
A narrow black species, with hind tibiae slender and conspicuously 
white. Head buccate with the vertex broad; mandibles stout, with lower 
tooth somewhat the longer; clypeus apically broadly rounded, its margin 
inflexed and obsolete, with lateral angles inconspicuous; cheeks short 
and apically stramineous; mouth, clypeus and face concolorous. An- 
