226 BRITISH ICHNEUMONS. [ Mesoleptus 

in its antemedial petiolar spiracles it is allied only to MW. /es/aceus and the 
next species. 
This species is frequent in marshy fields throughout Sweden and proba- 
bly throughout Europe, in August and September, sometimes (says Grav.) 
upon umbelliferous flowers. It is very widely distributed but certainly 
not common with us, and has not been recorded hence since 1835. Near 
London “in June” (Stephens); Nunton, Cheltenham and Cornworthy 
in Devon (Marshall coll.); Hastings (Esam); several at Wimbledon in 
early August (Stenton); New Forest (Miss Chawner); Shere (Capron); a 
male at light at Withycombe near Taunton on z9th September, 1908 
(Slater); Tostock in Suffolk late in 1898 (Tuck); Whitby in August 
(Beaumont). Banchory in September, 1910, Cromer and in profusion by 
the Tay at Birnam in Perth, zoth August, 1907 (Elliott); Nairn in August, 
1904 (Yerbury); Barr in Ayrshire in July, 1899 (Dalglish); Whiting Bay 
in the Isle of Arran in September, 1903 (Waterston). Poyntzpass in Co. 
Armagh in 1g1o (Johnson). I first took it by sweeping bracken at 
Matley Bog and Hinchelsea in the New Forest, in the middle of August, 
1901; subsequently I swept a couple in Tuddenham Fen on 12th August, 
1906; and on 18th October, 1908, a wholely testaceous 2 of the maxi- 
mum size flew in doors to light at Monks’ Soham House, Suffolk, at 
10.30 p.m. 
11. attenuatus, Bridg. 
Mesoleius attenuatus, Bridg. Trans. Ent. Soc. 1887, p. 371, ¢. 
Head with face, mandibles and the apically subtruncate clypeus, 
flavous. Antennae filiform and longer than body, with scape flavous 
beneath. Thorax with radical callosities alone flavous; notauli distinct, 
mesonotum smooth and shining, its pleurae scabriculous and dull; meta- 
thorax with no areae. Scutellum black. Abdomen elongate and 
slender with segments two to four or three to five red and the ventral 
plica pale; basal segment with petiole slender, parallel-sided, twice 
longer than broad; postpetiole a little longer but apically very little 
broader, finely scabriculous, not sulcate, and apically shining; second 
and third of equal length and finely scabriculous ; remainder transverse. 
Legs red with trochanters except the black base of hind ones, and apices 
of the anterior coxae, flavous ; hind tarsi, apical third of their tibiae and 
extreme apices of their femora nigrescent, two apical joints of their tarsi 
subequal in length. Wings with tegulae flavous, areolet present ; nervellus 
intercepted at its centre. Length,8mm. 6 Q. 
“It belongs to Sect. A. of J/esolep‘us of Holmgren’s Mon. Tryph. Suec., 
which division he afterwards placed in the genus J/esole‘us (Disp. Syn. 
Mesol. Scand.), and is very distinct from any of the group” (Bridg. 2. ¢.) ; 
hence it must be relegated to A/exefer. 
One male was taken by Mr. E. Brunetti and given by him to Bridg- 
man, with no locality, though certainly British. It is probably in the 
Norwich Castle Museum. It is an uncommon species, much mixed with 
M. typhae from which the antennal colouration and apically black hind 
femora sufficiently separate it. I have taken a couple of males in the 
Suffolk Bentley Woods, and Mr. W. W. Esam has given me a single 
female, found in the Hastings district about 1899. 
