Euryproctus] BRITISH ICHNEUMONS. 239 
and a little curved dorso-ventrally; petiole always very distinct from post- 
petiole and usually parallel-sided to the subcentral and prominent spira- 
cles; postpetiole dilated throughout, and often discally sulcate at its base; 
apical segment not emarginate; terebra slightly exserted and straight, 
though often deflexed. Legs with intermediate femora apically subatten- 
uate, their tibiae a little curved, the hind tarsi often white-banded, and all 
the claws simple. Areolet inconstant, petiolate. 
The distinct and usually parallel-sided petiole will at once distinguish 
this genus from AZesolevus and its allies, in which the basal segment is 
evenly explanate throughout from its base; here the segment is distinctly 
a little arcuate and not, as in JWesolep/us, straight. 
I retain this genus exactly as it was at first erected by Holmgren, 
since it has more recently been broken up into a multiplicity of subgenera 
and named groups by Thomson in his three papers (O. E. ix. 926; xiii. 
1429; xix. 1984). Such divisions of these as include those of our species 
which were originally placed here will be found in my table, but I am 
strongly of the opinion that their features are insufficient to constitute 
genera, except perhaps in the case of Sychnolefer and even here they lie 
more in superficial facies than structural characters. Pfankuch regards 
the kinds falling under /focfonus, Thoms., more correctly placed in 
Phobetes, Frst., on account of the sparse metanotal carinae: I use Thom- 
son’s, not Forster’s typeless, subgenera. Syndzpnus would well repay a 
month’s elucidation, which I have not found leisure to bestow upon it; 
there are many more forms than are here exhibited in Britain and these 
may prove to be good species. 
Table of Species. 
(18). 1. Basal segment evenly sculptured ; 
petiole elongate and very slender. 
(11). 2. Metanotum bicarinate; postpetiole 
often strongly, abruptly dilated. 
(10). 3. Metanotal costulae wanting; post- 
petiole bicarinate or not sulcate 
[EURYPROCTUS]. 
(9). 4. Antennae and hind tarsi broadly 
white-banded ; areola entire. 
ion 
(6). 5. Abdomen and hind tibiae entirely 
black I. ANNULATUS, Grav. 
(5). 6. Abdomenand hind tibiae very broadly 
red. 
(8). 7. Areolet entire ; face black; metano- 
tum dull ~ : .. 2. NEMORALIS, Fourc, 
(7). 8. Areolet wanting ; face flavous ; me- 
tanotum shining = 3. ALPINUS, Holmgr. 
(4). 9. Antennae and hind tarsi not banded ; 
areola incomplete .. aa 4. MUNDUS, Grav. 
(3). 10. Metanotal costulae_ entire ; post- 
petiole simply sulcate Ne 
LETER] he 5. GENICULOSUS, Grav. 
(2). 11. Metanotum not or hardly carinate ; 
postpetiole slightly dilated. 
(13). 12. Basal petiolar scrobes distinct; an- 
tennae white-banded[ HIMERTUS] 6, DEFECTIVUS, Grav. 
(12). 13. Basal petiolar scrobes wanting ; an- 
tennae not pale-banded [Ipocro- 
Nus]. 
