66 BRITISH ICHNEUMONS. [ Stenomacrus 
(19). 18. Radius emitted beyond centre of the 
flavous stigma Sb: . Q. VENTRALIS, Hlolmgr. 
(18). 19. Radius emitte -d from centre of the in- 
fuscate stigma . 10. AGILIS, Holmer. 
(15). 20. Space between submarginal ‘and re- 
current nervures longer than sub- 
marginal [Sect. v, Thoms. ]. 
(30). 21. Radial nervure emitted from centre of 
stigma. 
(23). 22. Stigma Le aeoaie a and convex 
“below ; i .. 11. CONFINIS, Holmgr. 
(22). 23. Stigma luteous, narrow, and straight 
below. 
(25). 24. Radial nervure externally straight ; 
size larcer sie ry .. 12. INTERMEDIUS, Aolm, 
(24). 25. Radial nervure externally curved; 
size smaller, 
(27). 26. Head transverse; terebra not ex- 
serted hs ae .. 13. COGNATUS, Holmer. 
(26). 27. Head cubical; ‘terebra sometimes 
elongately exserted. 
(29). 28. Cheeks of 4 black; terebra of 9 
elongately exserted 14. EXERENS, 7homis. 
(28). 29. Cheeks “of 6 flavous; terebra of Q 
not exserted 15. AFFINIS, Ze?/. 
(21). 30. Radial nervure emitted from distinctly 
before centre of stigma. 
(34). 31. Head distinctly transverse ; hind 
femora not entirely black. 
( 
( 
( 
( 
( 
33). 32. Body and legs very distinctly slender 16. PUSILLUS, Ze/t. 
82) Sask Body and legs, especially the hind or 
posterior, stouter .. 17. BINOTATUS, Holmer. 
entirely black. 
. 35. Length 2—3 mm.; face of g black.. 18. CUBICEPS, Zhoms. 
) 
) 
31). 34. Head cubical; hind femora usually 
) 
). 36. Length 4—s5 mm.; face of ¢ flavous 19. SILVATICUS, Holmgr. 
1. flaviceps, Grav. 
Orthocentrus flaviceps, Gr. I. E. iii. 364, ¢ (mec Holmgr.). O. Caneuera 
Holmgr. Sv. Ak. Handl. 1855, p. 336, excl. ¢. O. caudatus, Holmer. /.c. p. 351, 
var. indiv. Boh., ?. Stenomacrus flaviceps, Thoms. O. E. xxil. 2440, oak 
Head subglobose, of Q with the face below scrobes and the vertical 
orbits broadly stramineous, of ¢ with mouth, cheeks, face and both frontal 
and vertical orbits broadly flavous. Antennae filiform, shorter than body 
and infuscate with the scape flavous, and the following joints in both 
sexes ochraceous, beneath. Thorax subcylindrical and black with the ¢@ 
propleurae and callosities beneath radices flavous.. Abdomen _linear- 
cylindrical, narrower and a little longer than head and thorax; basal seg- 
ment evenly scabriculous and twice longer than broad; second segment 
of @ nearly entirely scabriculous ; @ with incisures of second and third 
testaceous. Legs normal; the anterior fulvous with the coxae and tro- 
chanters of @ stramineous; hind ones darker with the coxae basally in- 
fuscate above, and trochanters sometimes flavous ; tarsi, tibial apices and 
sides of femora sometimes infuscate. Wings hyaline with the stigma and 
radius stramineous, radix and tegulae of ¢ flavous ; areolet obliquely pen- 
tagonal with its nervures fine. Length, 2? mm. 
