Monoblastus | BRITISH ICHNEUMONS. 287 

3. exstirpatorius, Grav. 
Tryphon exstirpatorius, Gr. I. E. ii. 213; Drewsen, Wiegm. Arch. 1836, p. 37 ; 
Fonsc. Ann. Soc. Fr. 1849, p.224, ¢ 9. (2) Cteniscus exstirpatorius, Brisch. 
Schr. Phys. Ges. Konig. 1871, p.98; Schr. Nat. Ges. Danz. 1878, p. 106 (nec 
Holmer.). Polyblastus laevigatus, Holmgr. Sv. Ak. Handl. 1854, p. 75; lb. cit. 
1855, p. 203, ¢ ¢. Monoblastus laevigatus, Holmgr. /.c. 1856, p. 385; Brisch. 
Schr. Nat. Ges. Danz. 1878, p.95, ¢ ?. 
Head with the mouth and, except sometimes centrally, the face flavous. 
Antennae of 2 with flagellum broadly testaceous beneath ; of ¢ entirely 
black. Thorax immaculate, metanotal costae strong; scutellum apically 
and usually the ? postscutellum flavous. Abdomen oblong-ovate and 
sessile ; second to fourth segments except sometimes two discal black 
dots, apex of the first and sometimes base of fifth and sixth red; seventh 
of ¢ whitish, of 2 fulvous with the very short terebra concolorous. Legs 
normal and red ; anterior coxae and trochanters testaceous or stramineous, 
the latter basally black ; hind coxae basally or mainly black. Wings with 
the areolet irregular and subpetiolate, its outer nervure often weak ; radix 
and tegulae flavous. Length, 6—7 mm. 
Our commonest and most unmistakable species, since it is the only one 
with pale scutellum. It is found in Sweden and France and has been 
bred from Lmphytus rufocinctus according to Cameron (i. 273), in Ger- 
many by Brischke from Jficronematus pullus, Pontania proxima and Pter- 
onus miliaris, according to Gaulle. Introduced by Bridgman (Entom. 
1880, p. 54) upon his taking three specimens near Norwich in 1879; he 
adds later that J. Fletcher of Worcester bred it from Lviocampa ovata. 
There is a full series from Surrey in Dr. Capron’s collection; I have taken 
it at Horning and Wroxham Broad in Norfolk in the middle of June, on 
Heracleum flowers on the Southwold cliffs in July, and upon those of 
Angelica in the New Forest in August. 
4. chrysopus, Gmel. 
Ichneumon chrysopus, Gmel. S. N. i.2702. Tryphon chrysopus, Grav. I. E. 
ii. 302, ¢ (sic ¢). Monoblastus Caproni, Bridg. Trans. Ent. Soc. 1882, p. 159, ¢. 
M. chrysopus, Pfank. Zeits. Hym. Dip. 1907, p. 148, g ?. 
A black species with the face, mouth except a circular clypeal spot, 
cheeks, anterior coxae and trochanters, flavous; anus and discal marks on 
second segments, with all femora broadly and hind tibiae mainly, black. 
Length, 64—g9 mm. 
This species is extremely like AZ. Jongicornis, with which I at first 
synonymised it and am able now to differentiate it by nothing but the 
colour of the cheeks, femora and second segment; Pfankuch, however, 
was Satisfied respecting their distinctness, and compares the present more 
particularly with JZ. exstirpatortus, from which he says it may be known 
by its flavous cheeks and front of head which bears but a single black 
clypeal spot, the scutellum is black, mesopleurae almost rugosely punc- 
tate, metanotal costae weak and costulae wanting, basal segment almost 
as long as in JV. dongicornis, second with two often coalesced black dots 
on its disc, anus black with terebral sheaths pale. 
Bridgman’s species is obviously synonymous, and the type is in my 
collection with a full series of both sexes, taken in Surrey by Capron 
thirty years ago ; elsewhere it has been only recognised in Germany. I 
