98 THE ENTOMOLOGIST. 
++ Abdomen of the female obtuse at the apex; the last ventral 
segment reaching, or almost reaching, the base of the 
aculeus. - - - - 2. Ichneumones amblypygt. 
** Petiole slightly depressed (that is the transverse diameter is 
a little larger than its vertical diameter). 
3. Ichneumones platyurt. 
b. Metathoracic spiracles circular. 4. Ichnewmones pneustict. 
B. Spiracles placed in the middle of the 1st segment of the 
abdomen. - . - 5. Ichneumones heterogastrt. 
To the above Holmgren has added, in his valuable but 
unfinished ‘ Ichneumonologia Suecica’ (1864—71) :— 
1. Ichneumones oxypygi: 2nd to 4th ventral segments of the 
male furnished with an elevated fold after death. 
2. Ichneumones amblypygi: 8rd to 8th or 4th to 8th ventral 
segments smooth; 2nd and 8rd segments sometimes 
have a short elevated fold. 
The first division is easily recognised, as far as regards the 
female, by the last ventral segments having a longitudinal sht, 
which is wanting in the other divisions. The males are not so 
easily distinguished, but the presence of the ventral fold is the 
best mark; still this is sometimes present in the J. amblypyqt. 
Further notes to the ‘ Ichneumonologia Suecica,’ by Holmgren, 
are now in course of publication in the ‘Entomologisk Tidskrift ;’ 
and Tischbein’s recent tables, in the Stettin ‘Entomologische 
Zeitung,’ should specially be referred to. 
We shall not waste space by describing the general appearance 
of the family of Ichneumonide, because there are now so many 
good figures in various works which give a much better idea of 
the insects than we could do by description. The number of 
species is large. Kirchner makes 556 in his ‘ Catalogus Hyme- 
nopterum Hurope’ (1867), but of these it must be said that their 
synonymy has received but little attention. A few small genera 
belonging to the Cryptidze and Pimplide are also here included 
amongst the Ichneumonide. Dours, in his ‘Catalogue syno- 
nymique des Hyménopteres de France’ (1874), gives but 135 
species; and here also Stilpnus and one or two other small 
Cryptid genera are included. Marshall’s first-‘Catalogus’ (1870) 
included 262 British species; his Entomological Society's Cata- 
