270 BRITISH ICHNEUMONS. \Spilocryptus. 



SPILOCRYPTUS, Thomson. 

 Thorns. O. E. v. 501. 



Head with vertex declived behind ocelli ; clypeus apically sub-mutic ; 

 epistoma not or hardly convex. Antennae of ? filiform and white- 

 banded. Metathorax apically truncate ; coxal areae indeterminate ; 

 spiracles generally small and sub-circular. Abdomen not strongly convex, 

 nearly obovate, centrally red ; seventh segment with disc entirely, and of 

 the sixth and the eighth partly, white ; petiolar spiracles far behind the 

 centre of first segment ; venter strongly plicate ; terebra normal and 

 straight, spicula apically spinulose. Tibiae nearly mutic, front ones more 

 or less incrassate. Upper wings with areolet large and parallel-sided ; the 

 lower with nervellus sub-opposite, intercepted below or nearly in the centre. 



This genus differs from Hoplocrypius in the shorter abdomen of the 

 female, in having the petiolar spiracles far behind the centre, the lateral 

 carinae before the spiracles obsolete but basally dentate, and the apex of 

 the spicula hastate ; the petiolar area of the metathorax incomplete above 

 and laterally dentate or cristate, with its spiracles generally round. 



Twenty-three palaearctic species are here included, together with three 

 others doubtfully (of which we may consider Cryptus amoenus to be 

 correctly placed), by Schmiedeknecht, who retains Forster's name Agro- 

 thereutes sub-generically to include those kinds whose females are 

 brachypterous. 



Table of Species. 



Spiracles circular and small ; hind tibiae distinctly white basally. 



Abdomen stout, its post-petiole not white ; 

 $ macropterous. 



Cheeks narrow. 



Clypeus convex ; ? front coxae red, $ 

 scutellum white i. incubitor, Strom. 



(4). 5. Clypeus deplanate ; ? front coxae and 



$ scutellum black 2. CIMBICIS, Tschek. 



Cheeks buccate. 



Antennae of $ tricoloured ; $, fifth seg- 

 ment broadest, face black 3. MIGRATOR,/".:;;^. 



Antennae of ? bicoloured ; $ second seg- 

 ment broadest, face often white 4. fumipennis, Grav. 



Abdomen of $ slender, its post-petiole 

 white-marked ; ? brachypterous 5. abbreviator. Fab. 



Spiracles oval and usually large ; hind 

 tibiae not white-marked. 



Scutellum and pronotum white 6. adustus, Grav. 



Scutellum and pronotum black. 



Apophyses acute ; clypeus hardly dis- 

 creted 7. nubeculatus, Grav. 



(13). 14. Apophyses wanting; clypeus distinctly 



discreted 8. amoenus, Grav. 



