604 
FAUNA AND FLORA OF NORFOLK : ICHNEUMONS. 
Ichneumonum Belgii,’ this was the tirst great work on the subject 
after that of Gravenhorst’s, it treated only of the latter’s tirst 
family, or rather genus as it was then, Ichneumon, he subdivided 
it into many genera, from structural differences, arid in that state 
the family still remains, with very little alteration ; he afterwards 
published several papers, which may be looked upon as additions to 
this work, as well as a monograph entitled ‘Itevue des Anomalous 
de Belgique.’ Holmgren began in 1856 to publish monographs of 
several of the families, viz., ‘ Monographia Tryphoniduni Sueciae’; 
‘Conspectus Generum Pimpliarum Sueciae,’ 1860; ‘Monographia 
Uphionidum Sueciae,’ 1861; ‘Ichneumonologia Suecica,’ part i. 1864, 
part ii. 1871, part iii. 1889, the latter part not appearing till after 
his death; ‘A Monograph of the Genus Campoplex,’ 1872 ; 
‘ Dispositio methodica Exochorum Scandinaviae,’ 1873; ‘Dispositio 
methodica Mesoleiorum Scandinaviae,’ 1876. Eoerster, in 1850, 
published a monograph of the genus Pezomachue , Gr., dividing it 
into several genera, and describing many species ; he also published 
a synopsis of the families and genera of Ichneumons, monographs 
of the genus of Campoplex , and of the families and genera of 
iStiljpnoides and Plectiscoides. Taschenberg, in 1863 and 1865, 
published monographs of the German Pimplides and Cryjptides , 
giving tables of the genera and species. Professor Thomson, in 
1869, published the first part of his ‘ Opuscula Entomologica,’ the 
eighteenth part appeared a few months ago ; this work contains 
monographs of insects, and among them those of most of the 
families and genera of which this paper treats; these are the 
principal works on this subject, but there are a great many other 
papers scattered among the various Continental journals, it can there- 
fore easily be seen that a careful study of this branch of entomology 
cannot be carried on without considerable difficulty, on account of 
the scattered nature of its literature. In the earlier part of this 
century we have in this country had some good workers at this 
order, as we find from the lists they have left behind them ; 
I need only mention the names of Curtis, Stephens, Haliday, and 
later of Uesvignes. At the present time I know of but one earnest 
worker, the Kev. T. A. Marshall, and to him 1 am deeply indebted 
for very much assistance ; there are at present but few collectors. 
Mr. Billups, of London, and Mr. Bignell, of Plymouth, have bred 
and captured large quantities of Ichneumons, as I can testify, from 
