INTRODUCTORY PAPERS ON ICHNEUMONID®. 99 
logue, which is strictly synonymic, contains 258 species, and to 
these there are a few additions to be made, which will be men- 
tioned amongst their respective genera. 
The Ichnewmones oxypygi have been tabulated by Holmgren, 
as follows :— 
A. Scutellum generally slightly convex, slightly sloping at 
the tip. 
a. Apex of clypeus emarginate: head of female buccated or 
swollen; abdomen narrow and pointed. 
Gen. 1. Chasmodes, Wesm. 
b. Apical margin of clypeus entire, or sometimes somewhat 
sinuous. 
* Abdomen of the female with 8th dorsal segment exserted. 
Gen. 4. Hxophanes, Wesm. 
** The 8th dorsal segment not exserted. 
Gen. 2. Ichnewmon, Lin. 
B. Scutellum somewhat gibbous, abruptly sloping behind; 
sides of the metathorax with spines. 
Gen. 3. Hoplismenus, Grav. 
Before commencing the tables of species it must be observed 
that many, or perhaps we might say most, of these insects vary 
greatly in coloration ; for instance, the face of the male is gene- 
yally marked with white or yellow; sometimes the face is 
completely pale, sometimes only a thin streak by the sides of the 
eyes, and sometimes the face is quite black; these differences 
will occur as varieties of the same species. The legs also in one 
variety will be quite black, except that the front pair are slightly 
pale, whilst an extreme variety will have all the legs red. The 
same with the marks on the thorax, which are generally confined 
to the collar, lines or spots before and below the wings, the 
scutellum and post-scutcllum; these sometimes are present, 
sometimes entirely wanting. So also with the abdomen; some 
of the black species will have the margins obscure red, some of 
the segments more or less red, and in some instances the entire 
abdomen sordid red ; for example, see the varieties of Ichnewmon 
lineatus. Great variation also is found in those Ichneumons 
which have the abdomen yellow and black, the yellow being 
sometimes more or less marked with black; the same may be 
said of those we shall allude to as having the abdomen tricoloured 
