242 BRITISH ICHNEUMONS. [Stilpnus. 



I. gagates, Grav. 



Stilpmts ^agates, Gr. I. E. i. 667 ; Curt. B. E. 388 ; Ste. III. M. vii. 209 ; Tasch. 

 Zeits. Ges. Nat. 1865, p. 56; Fcirst. Verb. VVien. z.-b. Ver. 1876, pp. 36, 41 ; Thonis. 

 O. E. X. 1027, i 9 . 



Head not narrowed behind the eyes, black with the palpi pale ; clypeus 

 slightly discreted, somewhat impressed laterally, apically rounded and 

 obsoletely punctate ; mandibles with the upper tooth a little the longer. 

 Antennae short, filiform and somewhat stout ; of ? half the length of the 

 body, of $ longer ; more or less broadly red basally, with the scape usually 

 nigrescent above. Thorax black and nitidulous, with acute apophyses. 

 Abdomen glittering black and as long as the thorax, of $ lanceolate, of 9 

 sub-orbiculate, deplanate and broader than the thorax, with the basal 

 segment sub-linear ; post-petiole a little broader and canaliculate, with $ 

 spiracles usually prominent ; terebra sub-exserted. Legs normal, fulvous, 

 with the coxae and trochanters sometimes partly black. Wings hyaline ; 

 stigma piceous, radix and tegulae pale testaceous ; areolet pentagonal and 

 entire, with the external cubital nervure obsolete ; lower angle of the dis- 

 coidal cell not or hardly acute, nervellus antefurcal. Length, 4-5 mm. 



From all the following this species differs in its centrally sub-produced 

 clypeus and basally testaceous antennae. The female is very distinct in 

 its short, incrassate antennae, which do not reach to the apex of the meta- 

 thorax. 



It is said to occur in gardens and upon house windows ; Hope took it 

 at Netley in Shropshire and Haliday in Ireland, in June and August. St. 

 John's Wood at the end of September (Curtis) ; not uncommon in June, 

 near London (Stephens) ; Brundall near Norwich, in July (Bridgman) ; 

 Bickleigh, early in August (Bignell) ; Land's End (Marquand) : Lasting- 

 ham in Yorks. (Marshall) ; Fairlight in Sussex (Hastings List) ; common 

 at Glanville's Wootton (Dale) ; Maldon in Essex (Fitch). Dr. Capron used 

 to take it commonly at Shere in Surrey, and I have found it at Blakenham 

 and Monks' Soham in Suffolk, on the flowers of Angelica sylvestris in 

 the middle of August. Brischke has bred it in Germany from the very 

 abundant British dipteron, Afithomyia radiciim, Linn. 



2. pavoniae, Scop. 



Ichnemnon pat'oniae. Scop. Ent. Car. 762 ; Christ Hym. 368 ; Oliv. Enc. meth. 

 214, 9. Stilpuus pavoniae, Gr. I. E. i. 672; Ste. 111. M. vii. 209; Curt. B. E. 3S8 ; 

 Forst. Verb. Wien. z.-b. Ver. 1876, p. 36; Briscb. Scbr. Ges. Danz. 1881, p. 345; 

 Tboms. O. E. x. 1028, i 9 . 



Head hardly narrowed behind the eyes ; clypeus apically rounded and 

 not produced. Antennae longer than half the body, with the basal joints 

 pale red; the following black in (?, testaceous and gradually becoming 

 darker apically in ? . Thorax black ; petiolar area not or only slightly 

 impressed, but distinctly discreted ; apophyses distinct and obtuse. 

 Abdomen black with the second segment entirely, and often the third of 

 $ , testaceous or rufescent ; of $ lanceolate-oblong with the five basal 

 segments gradually dilated, of ? sub-orbiculate and slightly broader than 



