Stenomacrus | BRITISH ICHNEUMONS. ai 

head and premedially emitted radial nervure ; consequently I have had 
recourse to dividing them in my collection upon the general stoutness of 
the present species and slenderness of the last, especially in respect to 
that of the hind legs. 
It is only known on the Continent from southern Lapland, but Marshall 
introduced it as British in his 1872 Catalogue on the strength of a 
correctly named female from St. Albans, still in his collection * (though 
with it was a female S. /aric’s, Hal.). I possess a score of specimens 
from Taynuilt in Scotland in mid- September (Beaumont), Shere in Surrey 
(Capron). and several from Bickleigh in Devon at the end of October 
(Bignell) ; it has occurred to me by beating mountain ash, birch and hazel 
in woods in May at Bentley, by sweeping in marshes in June at Brandon 
and Eaton near Norwich, at Beccles on a flower of Angelica sylvestris in 
early September, and on reeds in Covehithe Broad on rst October. Big- 
nell’s late dates, combined with a specimen I beat from a yew tree in a 
fir wood at Belstead as early as zoth March, 1903, go to suggest that this 
species hibernates in the perfect state. 
18. cubiceps, Thoms. 
Stenomacrus cubiceps, Thoms. O. E. xxii. 2447, 3 ¢?. 
A small black species, with large head. Head cubical with the vertex, 
especially in ?, distinctly broad and subdilated behind the eyes; genal 
sulcus wanting ; face not pale. Antennae with the flagellar joints of 9° 
well discreted and pilose, the first triangular and not or in ¢ hardly 
longer than the second. Abdomen immaculate with the venter black, at 
most basally pale. Legs pale, infuscate-marked, in ¢ darker. Wings 
with the areolet wanting ; radial nervure emitted before centre of stigma ; 
anal nervure emitted from centre of brachial cell; recurrent nervures not 
approximate. Length, z—2} mm. 
Known at once by its peculiarly broad head and the discreted 9? 
flagellar joints ; it was the first species of Orthocentrides I was enabled to 
recognise. 
It has hitherto been known only from Sweden, but Capron took it at 
Shere, Bignell several at Bickleigh in early September, and I have met 
with it in Clare Island on the west coast of Ireland, at the base of the 
Corton cliffs at the end of August, on birch in the Bentley Woods and at 
Foxhall in the middle of May. Tull Ichneumonidae are collected as care- 
fully as Coleoptera we cannot tell the frequency of these very small 
species. 
19. silvaticus, Holmgr. 
Orthocentrus silvaticus, Holmgr. Sv. Ak. Handl. 1855, p.342; Brisch. Schr. 
Ges. Kénig. 1871, p. 103, ¢ ¢. O. femoralis, Holmgr. lib. cit. p. 346; Brisch. 
l.c. p. 103; Schr. Nat. Ges. Danz. 1878, p.110, ¢ ¢. Stenomacrus femoralis, 
‘Mhonms: OE. xxit..2445,.¢ 2 . 
A shining, finely punctate and somewhat large, black species with sub- 
cubical head. Head buccate and subdilated behind the eyes; face and 
frons smooth, the latter unevenly impressed in front ; g with most of the 
face, and 9 with the mouth and the face transversely below the scrobes, 
flavescent. Antennne basally flavescent beneath; basal flagellar joint of 
 quadrate and of ¢ a little longer than broad, second of @ transverse 
