Trematopygus | BRITISH ICHNEUMONS. Wis 

5. atratus, Holmgr. 
Trematopygus atratus, Holmgr. Sv. Ak. Handl. 1855, p. 181, ?; Brisch. Schr. 
Phys. Ges. Kénig. 1871, p. 86; Schr. Nat. Ges. Danz. 1878, p.90; /.c. 1892, p. 38, 
¢ ¢?. Spudaeus atratus, Thoms. O. E. xix. 2010. 
A somewhat dull species with the abdominal incisures pale, and seg- 
ments two and three transimpressed. Head subdilated behind the eyes; 
black, 9 with mouth and clypeus red, ¢ with palpi, mandibles, face and 
cheeks flavous; clypeus apically subemarginate and centrally produced. 
Antennae nigrescent, of g with scape flavous and flagellum rufescent 
beneath. Thorax black, g with marks on the pro- and meso-sternum 
flavous; metathorax somewhat short, areola sulciform and short, costulae 
wanting, petiolar area large. Abdomen scabriculous and black with 
incisures rufescent; three basal segments very closely punctate and trans- 
versely impressed; basal segmenta little curved, broad, a littie constricted 
basally and hardly sulcate discally. Legs red wtth coxae, base of tro- 
chanters, hind tarsi and their subtestaceous tibiae apically, black; @ with 
trochanters and anterior coxae flavous. Stigma iniuscate, basally paler ; 
areolet wanting ; nervellus intercepted a little below its centre. Length, 
6—8 mm. 
At once known by its distinctly impressed second and third basal seg- 
ments. 
Sweden, Prussia and France. Brischke records it in 1878 from larvae 
of Nematus septentrionalis; and it was introduced as British by Bairstow 
(Trans. Yorks Nat. Union, 1882, p. 107; cf. Trans. Ent. Soc. 1882, p. 157) 
on the strength of several examples bred by Wilson in 1881 from Cvoesus 
septentrionalis at York. Later, Bridgman says that it was also bred from 
C. varians and captured by Atmore at Kings Lynn in Norfolk; I took a 
? on birch in Tuddenham Fen, Suffolk, on gth June, 1910, with immacu- 
late incisures and possess a typical ¢, captured by Rev. A. Thornley at 
Scotton Common, near Gainsborough, on 22nd of the same month in 1898. 
TRYPHON, Faillén. 
Fall. Specim. Hym. (1813), 16; Holmgr. Sv. Ak. Handl, 1855, p. 185. 
Head transverse and hardly dilated posteriorly ; vertex not centrally in- 
cised ; clypeus apically broadly rounded, and generally transversely 
elevated before its centre, impressed before its apex; oral costa usually 
elevated ; labrum hardly exserted; frons black, rarely cornute. Antennae 
filiform, rarely as long as body. Thorax stout ; epomiae large and extend- 
ing nearly to mesonotum ; metanotal areae usually distinct and entire. 
Scutellum black. Abdomen centrally red, with the segments not im- 
pressed ; basal segment nearly always with two parallel discal carinae, a 
little narrowed but not acutely dentate basally, with spiracles before its 
centre; second with distinct thyridii; terebra short and straight. Legs 
normal with femora stout and not elongate; tarsal claws not pectinate, 
ungues stout and curved. Areolet entire, irregular and generally petiolate ; 
tegulae black, at most apically testaceous; nervellus postfurcal or 
opposite. 
So very rarely have our species of this genus been bred—once from a 
Dolerus in Prussia, once from a Selandria in France and once from 
M 
