Hyperacmus | BRITISH ICHNEUMONS. 21 

HYPERACMUS, Holmgren. 
Holmgr. Sv. Ak. Handl. 1855, p. 322; Nothaima, Cam. Journ. Bombay N.H. 
Soc. 1902, p. 428. 
Head transverse, with the vertex emarginate and face strongly pro- 
tuberant ; interantennalcarinaentirely wanting; clypeus deplanate and but 
obsoletely discreted ; eyes not emarginate. Antennae stout, with the scape 
subcylindrical; flagellum filiform, of g as long as the body and apically 
attenuate with the joints elongate and the fifth basally emarginate, of @ 
short with the joints subtransverse and externally subdenticulate. 
Thorax deplanate, with the epomiae wanting and epicnemia entire ; 
notauli very distinct and extending to centre of mesonotum ; metathorax 
somewhat convex and rugulose with obvious longitudinal but no trans- 
verse costae; petiolar area subobsolete. Abdomen of 9 oblong-ovate, 
of ¢ subcylindrical; basal segment rugulose, gradually constricted 
basally and laterally immarginate, with spiracles slightly before the 
centre; remaining segments transverse and nitidulous. Legs sub- 
incrassate and not very short, with the tibiae externally setiferous and 
calcaria curved. Wings narrow and somewhat elongate; areolet want- 
ing ; nervellus intercepted below its centre. 
The strongly deplanate and nitidulous mesothorax and abdomen, and 
the peculiar conformation of the antennae of both sexes, will instantly 
distinguish this genus, which is somewhat allied to Lamprono/a. 
1. crassicornis, Grav. 
Exochus crassicornis, Gr. I. E. ii. 347, ?. Hyperacmus crassicornis, 
Holmgr. Sv. Ak. Handl. 1855, p. 322, ¢: Brisch. Schr. Ges. Kénig. 1871, p. 101; 
Schr. Nat. Ges. Danz. 1878, p. 108; Thoms. Deut. Ent. Zeit. 1887, p. 199, ¢¢. 
Nothaima bicarinata, Cam. l.c. 
A strongly shining black species with palpi pale, the mouth, underside 
of antennae and most of the legs castaneous. Head somewhat tumidu- 
lous, with vertex emarginate and face smooth; frons somewhat convex 
and centrally canaliculate. Thorax stout with the metathorax scabrous 
and bicarinate throughout; spiracles oval and not small. Abdomen 
black or sometimes mainly badious; basal segment laterally nearly 
straight, dorsally scabriculous with basal weak carinae extending to the 
spiracles, which are a little before the centre and not prominent ; remain- 
ing segments strongly shining. Legs castaneous with the anterior, 
especially in g, paler; all the coxae and the hind trochanters black. 
Wings hyaline with the tegulae, radix and stigma piceous; radial cell 
somewhat narrow. Length, 7—9 mm. 
This is an uncommon species both in Sweden and central Europe. It 
was introduced as British by Bridgman (Trans. Ent. Soc. 1882, p. 161) on 
the strength of a female taken at Shere in Surrey by Dr. Capron, and the 
latter records both sexes from the same locality by sweeping rough grass 
under trees on 3rd September (Entom. 1883, p. 240). These three 
specimens are now in my collection, together with a fourth captured at 
Shirley on zoth August, 1904, by Mr. Ernest Bedwell. 1 have examined 
examples from India. 
