52 



BRITISH ICHNEUMONS. 



obsolete with the intervening space not striolate, though occasionally 

 rugose ; third segment with a depression, at least in $ ; anus of S immacu- 

 late, of ? more rarely with a pale-marked membrane. Legs robust, claws 

 usually stout and curved ; the 6 calcaria elongate ; tibiae of $ often ex- 

 ternally white-marked in the centre. Wings with apex of radial nervure 

 very often arcuate, though scarcely sinuate. 



Certain species of this genus, Thomson remarks, closely approach those 

 of Eui^alamus, but differ in the areolation of the metathorax and in the 

 conformation of the post-petiole. 



Tal>/e of Species. 



(32). II. 



(26). 25. 



Frontal orbits and nearly the whole scute 



Coxae of $ with scopulae ; abdomen 

 of $ testaceous 



Coxae of $ with no scopulae ; abdomen 

 of (^ black 



Frontal orbits and scutellum castaneous 

 or black, latter rarely apically flavous. 



Mesonotum dull ; orbits and scutellum 

 of $ red, its anus usually flavous. 



Post-petiole scabriculous ; anus of $ 

 pale ; flagellum of $ white-banded. 



Gastrocaeli deep ; abdomen mainly 

 black ; $ scopulae wanting 



Gastrocaeli superficial ; abdomen ru- 

 fescent ; 5 scopulae distinct 



Post-petiole punctate ; anus of 9 , and 

 flagellum of $ , immaculate 



Mesonotum shining ; orbits and scu- 

 tellum of $ not red, its anus not dis- 

 tinctly flavous. 



Size 8 mm. or more ; coxae of $ with 

 no cristulae. 



Abdomen black, or at most badious. 



Tibiae of ? not broadly white exter- 

 nally ; flagellum of $ pale-banded. 



Vertical orbits immaculate ; coxae of $ 

 scopuliferous. 



Post-petiole not centrally glabrous 



Post-petiole centrally glabrous 



Vertical orbits pale-marked ; coxae of 

 $ with no scopulae 



Tibiae of ? broadly white externally ; 

 flagellum of $ not banded. 



Coxae of $ with scopulae ; $ thyridii 

 linear, its tibiae not white 



Coxae of $with no scopulae. 



Radial nervure incurved ; $ thyridii 

 circular, its tibiae not white 



Radial nervure straight ; posterior 

 tibiae of $ externally white 



Abdomen of $ , and usually of $ , casta- 

 neous or red. 



Terebra less than one-third shorter 

 than abdomen ; $ with neither 

 flagellar band nor coxae white. 



Coxae of $ with no scopulae ; $ abdo- 

 men castaneous 



Hum stramineous. 



1. LUTEIVENTRIS, Gr. 



2. siCARius, Grav. 



3. RUBRICOSUS, Holm. 



4. RUFICEPS, Grav. 



5. RUFIFRONS, Grav. 



6. NIGRITARIUS, Gr. 



7. LIOSTYLUS, Thorns. 



8. DissiMiLis, Grav. 



9. FABRICATOR, Fab. 



10. ANNULATOR, Fab. 



11. PALLIDIFRONS, Gr. 



12. FUGITIVUS, Grav. 



