178 BRITISH ICHNEUMONS. [ Trvphon 

an Athalia in Austria—that I think one is justified in the supposition that 
the Tenthredinids are not hosts of these abundant parasites, especially 
when the number of Mesoleii, etc., bred thence by Brischke is considered. 
Mr. J. E. Fletcher’s most interesting discovery of the economy of Zzy- 
phon signator points to a very probable parasitism of the present genus 
upon the fossorial aculeates to whose ecdyses so little attention has been 
yet paid, in spite of the notice their interesting habits in the perfect state 
have from the earliest times excited. Wasps’ and the larger bees’ nests 
have frequently been kept under observation, with the result that we know 
hymenopterous parasites in most of our species; but those of fossors, 
whether constructed in sand, clay or rotten wood, are more difficult to 
come at and have consequently been very little studied. 
In his 1898 list of South Devon Ichneumonidae, Bignell says he has 
taken “ Zrematopy gus rubiginosus, Gr.,” at Princetown towards the end of 
June. This 77yphon, sensu Grav., had not before been noted as British; 
and Pfankuch tells us that the type is Acrofomus tnsidiator, Holmgr., ¢. 
Bignell’s insect was most probably named by Rev. T. A. Marshall, in whose 
collection I find three males of 77ypfhon, sensu stricto, under the name 
rubiginosus, Gr. These, however, are nothing but one Z7ryphon elongator 
and two Zryphon stgnaior, all somewhat small with unusally infuscate 
abdomens. 
Table of Species. 
(4). 1. Frons witha distinct central, elongate 
horn. 
(3). 2. Horn not apicallyincised ; coxae black 
[COSMOCONUS, Forst.] .. I. ELONGATOR, Fad. 
(2). 3. Hern apically incised; coxae pale 
5 
[COELOCONUS, Forst. ] 
(1). 4. Frons with no central horn. 
5. Scrobes internally elevated; hind 
femora red|SYMPOETHUS, Forst.] 
(7). 6. Basalsegments, metanotum and frons 
bo 
BRACHYACANTHUS, Gad, 
finely. punctate ats 3. HELOPHILUS, Grav. 
(6). 7. Basal segments, metanotum and frons 
scabriculous and dull om 4. EXCLAMATIONIS, Grav. 
(5). 8. Scrobes internally simple; hind fem- 
ora almost always black. 
(10). g. Metanotum glittering with no longi- 
tudinal costae | PSILOSARGE, 
Forst. }. 5. EPHIPPIUM, Hlo/mgr. 
(9g). 10. Metanotum punctate with longitudinal 
costae. 
(16). 11. Scrobes auricularly dilated above the 
antennae, as figured [OTITO- 
CHILUS, Forst.}. 
). 12. Face partly or entirely flavous. 
). 13. Anus immaculate red; all the tro- 
chanters black-marked .. .. 6. RUTILATOR, £2772. 
). 14. Anus more or less nigrescent; tro- 
chanters all flavous a .. 7. TROCHANTERATUS, A//g. 
). 15. Face immaculate black 8. VULGARIS, Holmgr. 
) 
) 

16. Scrobes simple; basal segment less 
elongate. 
. 17. Face transversely flavous in the cen- 
tre or two-spotted ee .. 9. SIGNATOR, Grav, 
