Svenomacrus | BRITISH ICHNEUMONS. 65 


his distinctions, as usual, are by no means obvious till we possess a large 
number of specimens for comparison. We appear to possess none of the 
members of his first section—excepting the fabulous Weurateles papy- 
raceous—and it appears but poorly distinguished (in words) from his fifth, 
since the distinctions seem to lie in the sculptured apex of the second 
segment, the sub-parallel-sided and thrice longer than broad basal seg- 
ment, and the cultriform 9 abdomen. 
I am inclined to place more reliance than my predecessors upon the 
presence or absence of areolet in this genus. The outer nervure is always 
distinctly visible when present and examined in a good light, and I have 
met with none among my numerous specimens, concerning which I 
have felt compelled to entertain the least doubt in this respect. The 
feature cannot, however, be determined when the wing is gummed on 
card; but the wings of specimens carded with gum tragacanth can 
almost invariably be raised intact by passing a fine needle beneath them 
from the thorax outwards. 
Probably we have more species than those with which I am acquainted 
in the following table. 
Table of Species. 
(14). 1. Areolet of the wing more or less dis- 
tinctly present. 
(5). 2. Basal segment subdeplanate, neither 
sulcate nor impressed [Sect. iil, 
Thoms. ]. 
(4). 3. Vertical orbits broadly pale; basal 
nervure postfurcal . I. FLAVICEPS, Grav. 
(3). 4. Vertical orbits immaculate basal ner- 
vure continuous... ne .. 2. CAUDATUS, Holmgr. 
(2). 5. Basal segment convex, always im- 
pressed and discally ‘sulcate [Sect, 
iv, Thoms. 
(7). 6. Hind tibiae basally whitish ; 4 basal 
incisures stramineous. 2. 3. INCISUS, Grav. 
(6). 7. Hind tibiae not basally whitish; 4th 
incisure not pale. 
(9). 8. Radius emitted from basal third of 
stigma; terebra exserted i 4.1: CURVICAUDATUS, 47. 
(8). 9. Radius emitted from centre of stigma ; 
terebra not exserted. 
(13). 10. Stigma pale infuscate, as dark as the 
nervures, 
(12). 11. Areolet sessile; radius straight; an- 
tennae black a Es .. 5. CONCINNUS, Holmgr. 
(11). 12. Areolet subpetiolate; radius curved ; 
antennae testaceous : 6. DELETUS, Zhoms. 
(10). 13. Stigma pale stramineous, much paler 
than the nervures .. “5 , 
(1). 14. Areolet entirely wanting. 
(20). 15. Space between submarginal and re- 
current nervures shorter than sub- 
marginal [Sect. ii, Thoms. ]. 
(17). 16. Abdomen pubescent; radial nervure 
apically straight .. Pe? .. 8. RIDIBUNDUS, Grav. 
(16). 17. Abdomen not pubescent; radius dis- 
tinctly curved apically, 
LARICIS, Had. 
aa 
