Exenterus| BRITISH IGHNEUMONS. 213 

leaves in Tryphon, from sawfly larva taken off ash at Earlham, near Nor- 
wich. It is said to prey upon Pferonus ribestt by Thomson on the 
Continent, where Holmgren took it in June and July, and it ranges from 
Lapland to France. 
15. lineola, Steph. 
Tryphon lincola, Ste. Ill. M. vii. 255, ?. Exenterus Dahlbomi, Holmgr. Sv. 
Ak. Handl. 8855, p. 242, ¢. 
A very finely punctate species, with the central segments triangularly 
red. Head transverse and a little tumidous with the mouth, clypeus, face 
and cheeks, flavidous; clypeus subconvex and slightly depressed before 
its rounded apex. Antennae red beneath. Thorax somewhat stout and 
shortly pubescent; prothorax with a marginal flavous mark; metathoracic 
areae complete with the areola elongate. Abdomen ovate-fusiform with 
the apical margin of all the segments flavidous and a large triangular 
mark on each of the second to fifth segments; the basal gradually dilated 
apically, with fine and parallel carinae. Legs slender and red; anterior 
coxae and trochanters flavous, hind coxae basally and their tarsi apically 
infuscate. Tegulae flavidous, stigma infuscate and basally paler; ner- 
vellus intercepted a little below its centre. Length,5 mm. 4g 92. 
The peculiar abdominal markings render it sufficiently distinct. I have 
examined the single exponent of Stephens’ species in the National Col- 
lection and am sure of the synonymy. £. funebris, Holmgr., may not be 
distinct; at least, I consider an example from Nunton, so named by Mar- 
shall, to belong here. 
Only known elsewhere from Sweden, where it was captured by Boheman 
and is said to be very rare. Holmgren’s species was introduced as new 
to our fauna by Bridgman (Trans. Ent. Soc. 1883, p. 169), who took it at 
Horning Ferry in the Norfolk Broads at the end of June and adds that 
Bignell also captured a Q near Plymouth. I swept a single @ in marshes 
at Barton Mills in north-west Suffolk on 11th June, 1900; and Elliott has 
sent me males both from the Scots highlands, taken in September, and 
from Llandrindod in Radnor, during the middle of June, 1906. 
16. bimaculatus, Holmgr. 
Exenterus bimaculatus, Holmgr. Sv. Ak. Handl. 1854, p. 72, ¢; lib. cit. 1855, 
p.245, ¢ ¢. Cteniscus bimaculatus, Brisch. Schr. Ges. Konig. 1871, p. 99, ¢; 
Schr. Nat. Ges. Danz. 1878, p. 106, ¢. 
A stout, shining and very finely punctulate species. Head transverse 
and not narrowed posteriorly; clypeus somewhat convex, slightly de- 
pressed before the rounded apex. Antennae somewhat shorter than the 
body. Thorax gibbulous, scarcely longer than high, convex and as broad 
as the head; pleurae very finely punctate; areola subpentagonal and 
scutellum apically depressed. Basal abdominal segment finely rugulose 
and gradually dilated towards its apex. Legs slender. Areolet wanting ; 
radial nervure apically straight and nervellus intercepted below its centre. 
Black with the clypeus, mandibles, palpi, two subtriangular facial marks 
and the tegulae, flavous. Basal segment with a central apical red mark, 
the four following more or less entirely red and the remainder narrowly 
